Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
13/06/2024, 02:21
General
- Target efaa7293a55aed0c7114d97215ea544e59c9af070a1119363c74eb54ca7dbc26.exe
- Size 2.1MB
- Sample240613-cs8lxavcml
- SHA256 efaa7293a55aed0c7114d97215ea544e59c9af070a1119363c74eb54ca7dbc26
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/r8z0l
-
https://steamcommunity.com/profiles/76561199698764354
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 17 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
- 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
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\efaa7293a55aed0c7114d97215ea544e59c9af070a1119363c74eb54ca7dbc26.exe"C:\Users\Admin\AppData\Local\Temp\efaa7293a55aed0c7114d97215ea544e59c9af070a1119363c74eb54ca7dbc26.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat7791.tmpC:\Users\Admin\AppData\Local\Temp\kat7791.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 708 -s 24883⤵
- Program crash
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 708 -ip 7081⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat7791.tmp
memory/708-26-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-45-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-72-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-3-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-71-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-64-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-39-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-36-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-28-0x000000001B860000-0x000000001BABF000-memory.dmp
memory/708-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-46-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-62-0x0000000000400000-0x0000000000648000-memory.dmp
memory/708-63-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4216-5-0x0000000002AE0000-0x0000000002BF0000-memory.dmp
memory/4216-0-0x0000000002390000-0x0000000002391000-memory.dmp
memory/4216-9-0x0000000000400000-0x0000000000629000-memory.dmp