Detectionhighexperimental
Potential Vcruntime140 DLL Sideloading
Detects potential DLL sideloading of vcruntime140.dll, a common C++ runtime library. Threat actors have been observed using DLL sideloading techniques to load malicious payloads under the guise of legitimate applications such as SqlWriter, SqlDumper etc. Notably, APT29 has been documented leveraging WinELOADER to sideload vcruntime140.dll for executing malicious code.
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Launch
Swachchhanda Shrawan Poudel (Nextron Systems)Created Mon Jan 12d7a63acb-1284-49bc-bfea-7771146c8b1cwindows
Log Source
WindowsImage Load (DLL)
ProductWindows← raw: windows
CategoryImage Load (DLL)← raw: image_load
Detection Logic
Detection Logic3 selectors
detection:
selection:
ImageLoaded|endswith: '\vcruntime140.dll'
filter_main_legitimate_path:
ImageLoaded|startswith:
- 'C:\Windows\System32\'
- 'C:\Windows\SysWOW64\'
- 'C:\Program Files\'
- 'C:\Program Files (x86)\'
filter_main_legitimate_signer:
Signed: true
SignatureStatus: 'Valid'
Description: 'Microsoft® C Runtime Library'
condition: selection and not 1 of filter_main_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Rule Metadata
Rule ID
d7a63acb-1284-49bc-bfea-7771146c8b1c
Status
experimental
Level
high
Type
Detection
Created
Mon Jan 12
Path
rules/windows/image_load/image_load_side_load_vcruntime140.yml
Raw Tags
attack.defense-evasionattack.persistenceattack.privilege-escalationattack.t1574.001