Analysis
- max time kernel
121s - max time network
122s - platform
windows7_x64 - resource
win7-20240508-en - resource tags
- submitted
06/06/2024, 23:23
General
- Target 3a63202764bc3726e9e658e2caa10caaa6986ffe8f590d75221e0e50ebefb90d.exe
- Size 1.8MB
- Sample240606-3db79sde4x
- SHA256 3a63202764bc3726e9e658e2caa10caaa6986ffe8f590d75221e0e50ebefb90d
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/ta904ek
-
https://steamcommunity.com/profiles/76561199695752269
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 10 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- 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.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies system certificate store 2 TTPs 3 IoCs
- Suspicious behavior: EnumeratesProcesses 35 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\3a63202764bc3726e9e658e2caa10caaa6986ffe8f590d75221e0e50ebefb90d.exe"C:\Users\Admin\AppData\Local\Temp\3a63202764bc3726e9e658e2caa10caaa6986ffe8f590d75221e0e50ebefb90d.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat3BF7.tmpC:\Users\Admin\AppData\Local\Temp\kat3BF7.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
94308059B57B3142E455B38A6EB92015
94308059B57B3142E455B38A6EB92015
Tar4071.tmp
kat3BF7.tmp
memory/1724-0-0x00000000001B0000-0x00000000001B1000-memory.dmp
memory/1724-2-0x0000000003280000-0x00000000033CC000-memory.dmp
memory/1724-21-0x0000000000400000-0x00000000005CE000-memory.dmp
memory/3064-9-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-15-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-11-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-17-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-23-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-19-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-24-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-13-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-172-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-193-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-216-0x000000001E190000-0x000000001E3EF000-memory.dmp
memory/3064-230-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3064-251-0x0000000000400000-0x0000000000649000-memory.dmp