Analysis
- max time kernel
148s - max time network
152s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
25/06/2024, 20:00
General
- Target 99ef461bc750761a9fd872d354f234823ee68911ced1df1475a8c1d83c3df10c.exe
- Size 2.2MB
- Sample240625-yrdwsssdmr
- SHA256 99ef461bc750761a9fd872d354f234823ee68911ced1df1475a8c1d83c3df10c
Malware Config
Extracted
-
vidar
-
https://t.me/g067n
-
https://steamcommunity.com/profiles/76561199707802586
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0
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 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\99ef461bc750761a9fd872d354f234823ee68911ced1df1475a8c1d83c3df10c.exe"C:\Users\Admin\AppData\Local\Temp\99ef461bc750761a9fd872d354f234823ee68911ced1df1475a8c1d83c3df10c.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5C1A.tmpC:\Users\Admin\AppData\Local\Temp\kat5C1A.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
kat5C1A.tmp
memory/560-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/560-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/560-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/560-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/560-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/560-27-0x000000002F6E0000-0x000000002F93F000-memory.dmp
memory/560-35-0x0000000000400000-0x0000000000648000-memory.dmp
memory/560-36-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-0-0x00000000024A0000-0x00000000024A1000-memory.dmp
memory/2464-2-0x0000000002AF0000-0x0000000002C00000-memory.dmp
memory/2464-9-0x0000000000400000-0x0000000000641000-memory.dmp