HackTool - CobaltStrike Malleable Profile Patterns - Proxy

Status: test
Severity: high
Log source: category proxy
Author: Markus Neis, Florian Roth (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects cobalt strike malleable profiles patterns (URI, User-Agents, Methods).

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1071.001` Application Layer Protocol: Web Protocols

Rule body yaml

title: HackTool - CobaltStrike Malleable Profile Patterns - Proxy
id: f3f21ce1-cdef-4bfc-8328-ed2e826f5fac
related:
    - id: 953b895e-5cc9-454b-b183-7f3db555452e
      type: obsolete
    - id: 41b42a36-f62c-4c34-bd40-8cb804a34ad8
      type: obsolete
    - id: 37325383-740a-403d-b1a2-b2b4ab7992e7
      type: obsolete
    - id: c9b33401-cc6a-4cf6-83bb-57ddcb2407fc
      type: obsolete
status: test
description: Detects cobalt strike malleable profiles patterns (URI, User-Agents, Methods).
references:
    - https://github.com/rsmudge/Malleable-C2-Profiles/blob/26323784672913923d20c5a638c6ca79459e8529/normal/amazon.profile
    - https://www.hybrid-analysis.com/sample/ee5eca8648e45e2fea9dac0d920ef1a1792d8690c41ee7f20343de1927cc88b9?environmentId=100
    - https://github.com/rsmudge/Malleable-C2-Profiles/blob/26323784672913923d20c5a638c6ca79459e8529/normal/ocsp.profile
    - https://github.com/yeyintminthuhtut/Malleable-C2-Profiles-Collection/
    - https://github.com/rsmudge/Malleable-C2-Profiles/blob/26323784672913923d20c5a638c6ca79459e8529/normal/onedrive_getonly.profile
author: Markus Neis, Florian Roth (Nextron Systems)
date: 2024-02-15
tags:
    - attack.command-and-control
    - attack.t1071.001
logsource:
    category: proxy
detection:
    selection_amazon_1:
        c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
        cs-method: 'GET'
        c-uri: '/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books'
        cs-host: 'www.amazon.com'
        cs-cookie|endswith: '=csm-hit=s-24KU11BB82RZSYGJ3BDK|1419899012996'
    selection_amazon_2:
        c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
        cs-method: 'POST'
        c-uri: '/N4215/adj/amzn.us.sr.aps'
        cs-host: 'www.amazon.com'
    selection_generic_1:
        c-useragent:
            - 'Mozilla/4.0 (compatible; MSIE 6.0;Windows NT 5.1)'
            - 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E )'
            - 'Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 5.2) Java/1.5.0_08'
    selection_generic_2:
        c-useragent|endswith: '; MANM; MANM)'
    selection_oscp:
        c-uri|contains: '/oscp/'
        cs-host: 'ocsp.verisign.com'
    selection_onedrive:
        cs-method: 'GET'
        c-uri|endswith: '\?manifest=wac'
        cs-host: 'onedrive.live.com'
    filter_main_onedrive:
        c-uri|startswith: 'http'
        c-uri|contains: '://onedrive.live.com/'
    condition: 1 of selection_* and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

1 of selection_* and not 1 of filter_main_*

Stage 1: `selection_amazon_1`

selection_amazon_1:
    c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
    cs-method: 'GET'
    c-uri: '/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books'
    cs-host: 'www.amazon.com'
    cs-cookie|endswith: '=csm-hit=s-24KU11BB82RZSYGJ3BDK|1419899012996'

Stage 2: `selection_amazon_2`

selection_amazon_2:
    c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
    cs-method: 'POST'
    c-uri: '/N4215/adj/amzn.us.sr.aps'
    cs-host: 'www.amazon.com'

Stage 3: `selection_generic_1`

selection_generic_1:
    c-useragent:
        - 'Mozilla/4.0 (compatible; MSIE 6.0;Windows NT 5.1)'
        - 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E )'
        - 'Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 5.2) Java/1.5.0_08'

Stage 4: `selection_generic_2`

selection_generic_2:
    c-useragent|endswith: '; MANM; MANM)'

Stage 5: `selection_oscp`

selection_oscp:
    c-uri|contains: '/oscp/'
    cs-host: 'ocsp.verisign.com'

Stage 6: `selection_onedrive`

selection_onedrive:
    cs-method: 'GET'
    c-uri|endswith: '\?manifest=wac'
    cs-host: 'onedrive.live.com'

Stage 7: `not filter_main_onedrive`

filter_main_onedrive:
    c-uri|startswith: 'http'
    c-uri|contains: '://onedrive.live.com/'

Exclusions

Top-level NOT(...) conjuncts: predicates this rule actively suppresses.

Field	Kind	Excluded values
`c-uri`	match	`://onedrive.live.com/`
`c-uri`	starts_with	`http`

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`c-uri`	ends_with	`\?manifest=wac`
`c-uri`	eq	`/N4215/adj/amzn.us.sr.aps` `/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books`
`c-uri`	match	`/oscp/`
`c-useragent`	ends_with	`; MANM; MANM)`
`c-useragent`	eq	`Mozilla/4.0 (compatible; MSIE 6.0;Windows NT 5.1)` `Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E )` `Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko` `Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 5.2) Java/1.5.0_08`
`cs-cookie`	ends_with	`=csm-hit=s-24KU11BB82RZSYGJ3BDK\|1419899012996`
`cs-host`	eq	`ocsp.verisign.com` `onedrive.live.com` `www.amazon.com`
`cs-method`	eq	`GET` `POST`

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

HackTool - CobaltStrike Malleable Profile Patterns - Proxy

MITRE ATT&CK coverage

Rule body yaml

Stages and Predicates

Stage 0: `condition`

Stage 1: `selection_amazon_1`

Stage 2: `selection_amazon_2`

Stage 3: `selection_generic_1`

Stage 4: `selection_generic_2`

Stage 5: `selection_oscp`

Stage 6: `selection_onedrive`

Stage 7: `not filter_main_onedrive`

Exclusions

Indicators

Keyboard shortcuts

Search operators

HackTool - CobaltStrike Malleable Profile Patterns - Proxy

MITRE ATT&CK coverage

Rule body yaml

Stages and Predicates

Stage 0: condition

Stage 1: selection_amazon_1

Stage 2: selection_amazon_2

Stage 3: selection_generic_1

Stage 4: selection_generic_2

Stage 5: selection_oscp

Stage 6: selection_onedrive

Stage 7: not filter_main_onedrive

Exclusions

Indicators

Stage 0: `condition`

Stage 1: `selection_amazon_1`

Stage 2: `selection_amazon_2`

Stage 3: `selection_generic_1`

Stage 4: `selection_generic_2`

Stage 5: `selection_oscp`

Stage 6: `selection_onedrive`

Stage 7: `not filter_main_onedrive`