Suspicious Diantz Download and Compress Into a CAB File

Status: test
Severity: medium
Log source: category process_creation, product windows
Author: frack113
Source: github.com/SigmaHQ/sigma

Download and compress a remote file and store it in a cab file on local machine.

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1105` Ingress Tool Transfer

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: Suspicious Diantz Download and Compress Into a CAB File
id: 185d7418-f250-42d0-b72e-0c8b70661e93
status: test
description: Download and compress a remote file and store it in a cab file on local machine.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Diantz/
author: frack113
date: 2021-11-26
modified: 2022-08-13
tags:
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - diantz.exe
            - ' \\\\'
            - '.cab'
    condition: selection
falsepositives:
    - Unknown
level: medium

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    CommandLine|contains|all:
        - diantz.exe
        - ' \\\\'
        - '.cab'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`\\\\` corpus 8 (sigma 8) `.cab` corpus 5 (sigma 5) `diantz.exe` corpus 2 (sigma 2)	`field:"CommandLine" kind:match`

Suspicious Diantz Download and Compress Into a CAB File

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`