Sigma rule: UNC2452 Process Creation Patterns

Rule

Title

UNC2452 Process Creation Patterns

Status

test

Level

high

Author

Florian Roth (Nextron Systems)

Date

2021-01-22

Modified

2024-09-12

File

rules-emerging-threats/2020/TA/SolarWinds-Supply-Chain/proc_creation_win_apt_unc2452_cmds.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a specific process creation patterns as seen used by UNC2452 and provided by Microsoft as Microsoft Defender ATP queries

Log source

product

windows

category

process_creation

Detection

# To avoid writing complex condition. "selection_generic_1" and "selection_generic_2" are the same except for the extension used.
selection_generic_1:
    CommandLine|contains:
        - '7z.exe a -v500m -mx9 -r0 -p'
        - '7z.exe a -mx9 -r0 -p'
    CommandLine|contains|all:
        - '.zip'
        - '.txt'
selection_generic_2:
    CommandLine|contains:
        - '7z.exe a -v500m -mx9 -r0 -p'
        - '7z.exe a -mx9 -r0 -p'
    CommandLine|contains|all:
        - '.zip'
        - '.log'
selection_generic_3:
    ParentCommandLine|contains|all:
        - 'wscript.exe'
        - '.vbs'
    CommandLine|contains|all:
        - 'rundll32.exe'
        - 'C:\Windows'
        - '.dll,Tk_'
selection_generic_4:
    ParentImage|endswith: '\rundll32.exe'
    ParentCommandLine|contains|all:
        - 'C:\Windows'
        - '.dll'
    CommandLine|contains: 'cmd.exe /C '
selection_generic_5:
    ParentImage|endswith: '\rundll32.exe'
    Image|endswith: '\dllhost.exe'
    CommandLine: ''
condition: 1 of selection_generic_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.execution
• attack.t1059.001
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1059.001

References

• https://www.microsoft.com/security/blog/2021/01/20/deep-dive-into-the-solorigate-second-stage-activation-from-sunburst-to-teardrop-and-raindrop/

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2020/TA/SolarWinds-Supply-Chain/proc_creation_win_apt_unc2452_cmds.yml