Analysis
- max time kernel
147s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
24/12/2023, 18:06
General
- Target UndertaleTrainer.exe
- Size 3.8MB
- Sample231224-wpqfpsdfbj
- SHA256 b7d757263aac8d89154f7962550b795cca99e2df080d8bfdfbc3582b1a0d8d43
Score
10/10
Malware Config
Extracted
Family
-
marsstealer
Botnet
-
Default
C2
-
www.msk-post.com/server/init.php
Signatures
- Mars Stealer
An infostealer written in C++ based on other infostealers.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe"C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\Adobe\.exe"C:\Users\Admin\AppData\Roaming\Adobe\.exe"2⤵
- Executes dropped EXE
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 18403⤵
- Program crash
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4552 -ip 45521⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
.exe
.exe
.exe
memory/4552-10-0x0000000000400000-0x000000000043D000-memory.dmp
memory/4552-20-0x0000000000400000-0x000000000043D000-memory.dmp
memory/4656-0-0x0000000075030000-0x00000000757E0000-memory.dmp
memory/4656-1-0x0000000000350000-0x00000000003C2000-memory.dmp
memory/4656-12-0x0000000075030000-0x00000000757E0000-memory.dmp