Analysis
- max time kernel
140s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20231020-en - resource tags
- submitted
06/11/2023, 08:36
General
- Target cf5cb731825863750c4b86a3df164db7.exe
- Size 254KB
- Sample231106-khkfbsbf42
- SHA256 da52dc0f002d544115f1d64dbc1d7ec9569be150d59cfe0bfd3f6bb5aed54dc5
Malware Config
Extracted
-
stealc
-
http://jaimemcgee.top
-
url_path
/40d570f44e84a454.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 IoCs
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\cf5cb731825863750c4b86a3df164db7.exe"C:\Users\Admin\AppData\Local\Temp\cf5cb731825863750c4b86a3df164db7.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\cf5cb731825863750c4b86a3df164db7.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
-
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1464 -s 25242⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1464 -ip 14641⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
mozglue.dll
nss3.dll
memory/1464-1-0x0000000000770000-0x0000000000870000-memory.dmp
memory/1464-2-0x0000000000750000-0x000000000076B000-memory.dmp
memory/1464-3-0x0000000000400000-0x000000000062D000-memory.dmp
memory/1464-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1464-48-0x0000000000770000-0x0000000000870000-memory.dmp
memory/1464-52-0x0000000000400000-0x000000000062D000-memory.dmp
memory/1464-53-0x0000000000750000-0x000000000076B000-memory.dmp
memory/1464-90-0x0000000000400000-0x000000000062D000-memory.dmp