Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240508-en - resource tags
- submitted
28/05/2024, 05:13
General
- Target a999b7662a7095d6070dbc1a4748c34052284a0f871752d80433228c4036e7d6.exe
- Size 1.9MB
- Sample240528-fwv2rsff2w
- SHA256 a999b7662a7095d6070dbc1a4748c34052284a0f871752d80433228c4036e7d6
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://steamcommunity.com/profiles/76561199689717899
-
https://t.me/copterwin
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 8 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
- 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\a999b7662a7095d6070dbc1a4748c34052284a0f871752d80433228c4036e7d6.exe"C:\Users\Admin\AppData\Local\Temp\a999b7662a7095d6070dbc1a4748c34052284a0f871752d80433228c4036e7d6.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat597A.tmpC:\Users\Admin\AppData\Local\Temp\kat597A.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
kat597A.tmp
memory/1808-4-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1808-8-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1808-10-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1808-19-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1808-20-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1808-22-0x00000000284C0000-0x000000002871F000-memory.dmp
memory/1808-37-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1808-38-0x0000000000400000-0x0000000000646000-memory.dmp
memory/4192-0-0x00000000008A0000-0x00000000008A1000-memory.dmp
memory/4192-1-0x00000000040D0000-0x0000000004219000-memory.dmp
memory/4192-9-0x0000000000400000-0x00000000005EC000-memory.dmp