Analysis
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max time kernel
125s -
max time network
126s -
platform
windows11-21h2_x64 -
resource
win11-20250314-en -
resource tags
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submitted
17/03/2025, 15:57
General
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Target
GrimClient3.5.exe
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Size
42KB
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MD5
f8aad0ba44c22a03a92c8a992de6f188
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SHA1
a8f8ac95ee5a49a473104581ba073118c0f545f7
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SHA256
ccf8f646ddf20ba1e354c3ad35880e441d78ab292a2fd8b2edd49f3abfbe0422
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SHA512
7fa3cb08ee2b176ddaeb3bf20bed0a46a583c87a01922851975e1d191999f47a9dfe4421c8eb50c15c5c8b97d80c99d3da59fc97eb7756b84a216d5b61f51820
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SSDEEP
384:7AfIRHS2LtjR39hxiTRWgxfYTx2s/XZxIh/9oJEFq5nm0GTAsQ4KQsLd/SfgUfAQ:Z7DxURWf4uZvLlGTjQ4KZKfgm3Eht+
Malware Config
Extracted
mercurialgrabber
https://discord.com/api/webhooks/1351222685405024296/pvzGqfhW1MeB2uoiUPX5kRWkfddZIOBcx4zo8SpxDvoTeVdF_InCZ3P760g3QMnaEEnA
Signatures
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Mercurial Grabber Stealer
Mercurial Grabber is an open source stealer targeting Chrome, Discord and some game clients as well as generic system information.
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Mercurialgrabber family
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Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
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System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
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Modifies registry class 4 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\GrimClient3.5.exe"C:\Users\Admin\AppData\Local\Temp\GrimClient3.5.exe"1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}1⤵
- System Location Discovery: System Language Discovery
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,Control_RunDLL C:\Windows\System32\srchadmin.dll ,1⤵
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.131⤵
- Modifies registry class
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
555KB
MD55683c0028832cae4ef93ca39c8ac5029
SHA1248755e4e1db552e0b6f8651b04ca6d1b31a86fb
SHA256855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e
SHA512aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3
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Filesize
8KB
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Filesize
64KB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
10.8MB