Analysis
- max time kernel
140s - max time network
140s - platform
windows10_x64 - resource
win10v20201028 - submitted
08/02/2021, 06:53
General
- Target 1c430e444822fe0167d5b2f50292c425.exe
- Size 2.0MB
- Sample210208-9pgxng8fjs
- SHA256 ac1bddf60c98cb507f43077da521f73c9c19bea7553beb307fb0d0fa1f356657
Malware Config
Signatures
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Loads dropped DLL 2 IoCs
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses 2FA software files, possible credential harvesting 2 TTPs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious use of SetThreadContext 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\1c430e444822fe0167d5b2f50292c425.exe"C:\Users\Admin\AppData\Local\Temp\1c430e444822fe0167d5b2f50292c425.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\1c430e444822fe0167d5b2f50292c425.exe"{path}"2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im 1c430e444822fe0167d5b2f50292c425.exe /f & erase C:\Users\Admin\AppData\Local\Temp\1c430e444822fe0167d5b2f50292c425.exe & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im 1c430e444822fe0167d5b2f50292c425.exe /f4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3824-11-0x0000000000400000-0x000000000048C000-memory.dmp
memory/3824-13-0x0000000000400000-0x000000000048C000-memory.dmp
memory/3996-6-0x0000000004D10000-0x0000000004D11000-memory.dmp
memory/3996-9-0x0000000008040000-0x0000000008110000-memory.dmp
memory/3996-10-0x00000000081B0000-0x00000000081B1000-memory.dmp
memory/3996-8-0x0000000007670000-0x0000000007674000-memory.dmp
memory/3996-7-0x0000000005190000-0x0000000005191000-memory.dmp
memory/3996-2-0x0000000073920000-0x000000007400E000-memory.dmp
memory/3996-5-0x0000000004D60000-0x0000000004D61000-memory.dmp
memory/3996-4-0x00000000051B0000-0x00000000051B1000-memory.dmp
memory/3996-3-0x0000000000400000-0x0000000000401000-memory.dmp