Analysis
- max time kernel
122s - max time network
123s - platform
windows7_x64 - resource
win7-20231215-en - resource tags
- submitted
27/12/2023, 04:18
General
- Target SecuriteInfo.com.Trojan.PWS.Siggen3.35279.1356.9470.exe
- Size 278KB
- Sample231227-ew1ftacef5
- SHA256 2628201fa47cb015f5cc8ed60f7495ee3897a5b361971f82a7ebc2cd24cace46
Malware Config
Extracted
-
stealc
-
http://5.42.64.41
-
url_path
/40d570f44e84a454.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Deletes itself 1 IoCs
- Loads dropped DLL 2 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).
- 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 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.PWS.Siggen3.35279.1356.9470.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.PWS.Siggen3.35279.1356.9470.exe"1⤵
- 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\SecuriteInfo.com.Trojan.PWS.Siggen3.35279.1356.9470.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
memory/2808-3-0x0000000000400000-0x000000000062E000-memory.dmp
memory/2808-2-0x00000000001B0000-0x00000000001CC000-memory.dmp
memory/2808-1-0x0000000000290000-0x0000000000390000-memory.dmp
memory/2808-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2808-42-0x0000000000400000-0x000000000062E000-memory.dmp
memory/2808-68-0x0000000000400000-0x000000000062E000-memory.dmp
memory/2808-69-0x0000000000290000-0x0000000000390000-memory.dmp
memory/2808-73-0x0000000000400000-0x000000000062E000-memory.dmp
memory/2808-74-0x0000000000400000-0x000000000062E000-memory.dmp
memory/2808-75-0x0000000000290000-0x0000000000390000-memory.dmp