Analysis
- max time kernel
142s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
26/12/2023, 09:11
General
- Target 5c5d345bb44d5efcf46818d3ec00f69e.exe
- Size 298KB
- Sample231226-k5llxaeffp
- SHA256 95a88bacdc3b5524ee43abd4c37c729b69f4b2bf439d61cecedf54fb1f0df94e
Malware Config
Extracted
-
stealc
-
http://5.42.66.58
-
url_path
/3886d2276f6914c4.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 4 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.
- 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\5c5d345bb44d5efcf46818d3ec00f69e.exe"C:\Users\Admin\AppData\Local\Temp\5c5d345bb44d5efcf46818d3ec00f69e.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\5c5d345bb44d5efcf46818d3ec00f69e.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 1672 -s 25362⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 1672 -ip 16721⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
freebl3.dll
softokn3.dll
memory/1672-59-0x0000000002230000-0x000000000224C000-memory.dmp
memory/1672-91-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-6-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1672-39-0x0000000000690000-0x0000000000790000-memory.dmp
memory/1672-58-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-1-0x0000000000690000-0x0000000000790000-memory.dmp
memory/1672-80-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-5-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-4-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-98-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-100-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-102-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-3-0x0000000000400000-0x000000000062E000-memory.dmp
memory/1672-2-0x0000000002230000-0x000000000224C000-memory.dmp
memory/1672-109-0x0000000000400000-0x000000000062E000-memory.dmp