Qakbot Uninstaller Execution

Status: test
Severity: high
Log source: product windows, category process_creation
Author: Florian Roth (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects the execution of the Qakbot uninstaller file mentioned in the USAO-CDCA document on the disruption of the Qakbot malware and botnet

MITRE ATT&CK coverage

Tactic	Techniques
Execution	No specific technique

Event coverage

Provider	Event	Title
Sysmon	Event ID 1	Process creation

Rule body yaml

title: Qakbot Uninstaller Execution
id: bc309b7a-3c29-4937-a4a3-e232473f9168
status: test
description: Detects the execution of the Qakbot uninstaller file mentioned in the USAO-CDCA document on the disruption of the Qakbot malware and botnet
references:
    - https://www.justice.gov/usao-cdca/divisions/national-security-division/qakbot-resources
    - https://www.virustotal.com/gui/file/7cdee5a583eacf24b1f142413aabb4e556ccf4ef3a4764ad084c1526cc90e117/community
    - https://www.virustotal.com/gui/file/fab408536aa37c4abc8be97ab9c1f86cb33b63923d423fdc2859eb9d63fa8ea0/community
author: Florian Roth (Nextron Systems)
date: 2023-08-31
modified: 2023-09-01
tags:
    - attack.execution
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\QbotUninstall.exe'
        - Hashes|contains:
              - 'IMPHASH=E772C815072311D6FB8C3390743E6BE5'
              - 'SHA256=423A9D13D410E2DC38EABB9FDF3121D2072472D0426260283A638B822DCD5180'
              - 'SHA256=559CAE635F0D870652B9482EF436B31D4BB1A5A0F51750836F328D749291D0B6'
              - 'SHA256=855EB5481F77DDE5AD8FA6E9D953D4AEBC280DDDF9461144B16ED62817CC5071'
              - 'SHA256=FAB408536AA37C4ABC8BE97AB9C1F86CB33B63923D423FDC2859EB9D63FA8EA0'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    - Image|endswith: '\QbotUninstall.exe'
    - Hashes|contains:
          - 'IMPHASH=E772C815072311D6FB8C3390743E6BE5'
          - 'SHA256=423A9D13D410E2DC38EABB9FDF3121D2072472D0426260283A638B822DCD5180'
          - 'SHA256=559CAE635F0D870652B9482EF436B31D4BB1A5A0F51750836F328D749291D0B6'
          - 'SHA256=855EB5481F77DDE5AD8FA6E9D953D4AEBC280DDDF9461144B16ED62817CC5071'
          - 'SHA256=FAB408536AA37C4ABC8BE97AB9C1F86CB33B63923D423FDC2859EB9D63FA8EA0'

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
`Hashes`	match	`IMPHASH=E772C815072311D6FB8C3390743E6BE5` `SHA256=423A9D13D410E2DC38EABB9FDF3121D2072472D0426260283A638B822DCD5180` `SHA256=559CAE635F0D870652B9482EF436B31D4BB1A5A0F51750836F328D749291D0B6` `SHA256=855EB5481F77DDE5AD8FA6E9D953D4AEBC280DDDF9461144B16ED62817CC5071` `SHA256=FAB408536AA37C4ABC8BE97AB9C1F86CB33B63923D423FDC2859EB9D63FA8EA0`
`Image`	ends_with	`\QbotUninstall.exe`

`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)

Qakbot Uninstaller Execution

MITRE ATT&CK coverage

Event coverage

Rule body yaml

Stages and Predicates

Stage 0: `condition`

Stage 1: `selection`

Indicators

Keyboard shortcuts

Search operators

Qakbot Uninstaller Execution

MITRE ATT&CK coverage

Event coverage

Rule body yaml

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`