Analysis
- max time kernel
144s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20230915-en - resource tags
- submitted
19/10/2023, 08:41
General
- Target b49d3b05754d98405c82e912ab6bf09d.exe
- Size 238KB
- Sample231019-klez1sfa2t
- SHA256 2ceff65463ef3156fafaae4c327ac9f81a3d7540f6f44d16be2546ddabdcb6ab
Malware Config
Extracted
-
stealc
-
http://kevinrobinson.top
-
url_path
/e9c345fc99a4e67e.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\b49d3b05754d98405c82e912ab6bf09d.exe"C:\Users\Admin\AppData\Local\Temp\b49d3b05754d98405c82e912ab6bf09d.exe"1⤵
- Checks computer location settings
- 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 timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b49d3b05754d98405c82e912ab6bf09d.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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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4952 -s 26362⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4952 -ip 49521⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
mozglue.dll
nss3.dll
memory/4952-1-0x00000000008C0000-0x00000000009C0000-memory.dmp
memory/4952-2-0x0000000000400000-0x000000000062D000-memory.dmp
memory/4952-3-0x00000000007E0000-0x00000000007FB000-memory.dmp
memory/4952-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4952-57-0x00000000008C0000-0x00000000009C0000-memory.dmp
memory/4952-72-0x0000000000400000-0x000000000062D000-memory.dmp
memory/4952-73-0x0000000000400000-0x000000000062D000-memory.dmp
memory/4952-90-0x0000000000400000-0x000000000062D000-memory.dmp