Analysis
- max time kernel
122s - max time network
129s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
02/08/2023, 09:09
General
- Target b2c05d6fee47f1c3b44226a8af13f799.exe
- Size 296KB
- Sample230802-k4gassfa4x
- SHA256 a52921112e0ccf922d4dbf38d241e5d03fb77bf9940354b37581d4d1c6d86054
Malware Config
Extracted
-
stealc
-
http://adriaenclaeys.top/e9c345fc99a4e67e.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 22 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\b2c05d6fee47f1c3b44226a8af13f799.exe"C:\Users\Admin\AppData\Local\Temp\b2c05d6fee47f1c3b44226a8af13f799.exe"1⤵
- Loads dropped DLL
- 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\b2c05d6fee47f1c3b44226a8af13f799.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4756 -s 26682⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4756 -ip 47561⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Are.docx
mozglue.dll
mozglue.dll
nss3.dll
memory/4756-136-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4756-184-0x00000000025C0000-0x00000000025D5000-memory.dmp
memory/4756-174-0x0000000000400000-0x0000000002439000-memory.dmp
memory/4756-133-0x00000000025C0000-0x00000000025D5000-memory.dmp
memory/4756-135-0x0000000000400000-0x0000000002439000-memory.dmp
memory/4756-204-0x0000000004080000-0x000000000409B000-memory.dmp
memory/4756-209-0x0000000000400000-0x0000000002439000-memory.dmp
memory/4756-134-0x0000000004080000-0x000000000409B000-memory.dmp
memory/4756-219-0x0000000000400000-0x0000000002439000-memory.dmp
memory/4756-220-0x0000000000400000-0x0000000002439000-memory.dmp