Analysis
- max time kernel
139s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20230831-en - resource tags
- submitted
06/09/2023, 18:34
General
- Target fe882df431e2a0475d0e1fe4de15929a.exe
- Size 268KB
- Sample230906-w7rfqaag7t
- SHA256 ed0d87028ca259fd20def7b2131b184049ef43c5507937d8a5a9faf40ca9f761
Malware Config
Extracted
-
stealc
-
8268873659707098636355379426
-
http://charlesjones.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\fe882df431e2a0475d0e1fe4de15929a.exe"C:\Users\Admin\AppData\Local\Temp\fe882df431e2a0475d0e1fe4de15929a.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\fe882df431e2a0475d0e1fe4de15929a.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- Suspicious use of WriteProcessMemory
-
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 2260 -s 26962⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2260 -ip 22601⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
mozglue.dll
nss3.dll
memory/2260-4-0x0000000000400000-0x00000000022EA000-memory.dmp
memory/2260-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2260-1-0x0000000002400000-0x0000000002500000-memory.dmp
memory/2260-3-0x0000000000400000-0x00000000022EA000-memory.dmp
memory/2260-71-0x0000000002400000-0x0000000002500000-memory.dmp
memory/2260-77-0x0000000000400000-0x00000000022EA000-memory.dmp
memory/2260-81-0x0000000004030000-0x000000000404B000-memory.dmp
memory/2260-2-0x0000000004030000-0x000000000404B000-memory.dmp
memory/2260-91-0x0000000000400000-0x00000000022EA000-memory.dmp
memory/2260-92-0x0000000000400000-0x00000000022EA000-memory.dmp