Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
09/06/2024, 15:59
General
- Target 913ffffe973462ca717e6d6a35435f05.exe
- Size 2.4MB
- Sample240609-tfe79sch53
- SHA256 d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741
Malware Config
Extracted
-
stealc
Signatures
- Detect Vidar Stealer 1 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- 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.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\913ffffe973462ca717e6d6a35435f05.exe"C:\Users\Admin\AppData\Local\Temp\913ffffe973462ca717e6d6a35435f05.exe"1⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\ProgramData\GIEGHJEGHJ.exe"C:\ProgramData\GIEGHJEGHJ.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\GIEHJDHCBAEH" & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 103⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
GIEGHJEGHJ.exe
memory/4092-0-0x0000000000940000-0x000000000100F000-memory.dmp
memory/4092-7-0x000000001E820000-0x000000001EA7F000-memory.dmp
memory/4608-64-0x0000000008550000-0x0000000008B68000-memory.dmp
memory/4608-66-0x0000000007FE0000-0x0000000007FF2000-memory.dmp
memory/4608-59-0x0000000072AEE000-0x0000000072AEF000-memory.dmp
memory/4608-60-0x0000000005760000-0x0000000005D04000-memory.dmp
memory/4608-61-0x0000000005250000-0x00000000052E2000-memory.dmp
memory/4608-62-0x0000000072AE0000-0x0000000073290000-memory.dmp
memory/4608-63-0x00000000051E0000-0x00000000051EA000-memory.dmp
memory/4608-57-0x0000000000400000-0x0000000000480000-memory.dmp
memory/4608-65-0x00000000080A0000-0x00000000081AA000-memory.dmp
memory/4608-75-0x0000000072AE0000-0x0000000073290000-memory.dmp
memory/4608-67-0x0000000008040000-0x000000000807C000-memory.dmp
memory/4608-68-0x00000000081B0000-0x00000000081FC000-memory.dmp
memory/4608-69-0x0000000008330000-0x0000000008396000-memory.dmp
memory/4608-70-0x0000000008CF0000-0x0000000008D66000-memory.dmp
memory/4608-71-0x0000000008510000-0x000000000852E000-memory.dmp
memory/4608-72-0x0000000009EF0000-0x000000000A0B2000-memory.dmp
memory/4608-73-0x000000000A6F0000-0x000000000AC1C000-memory.dmp
memory/4744-58-0x0000000000C70000-0x0000000000C71000-memory.dmp