Analysis
- max time kernel
145s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
27/06/2024, 01:44
General
- Target 91858fd31593f6bd31cd02d21097ee491766f20fcb7ba9e9a86d21d5670bdd73.exe
- Size 1.5MB
- Sample240627-b57ppswdqf
- SHA256 91858fd31593f6bd31cd02d21097ee491766f20fcb7ba9e9a86d21d5670bdd73
Malware Config
Extracted
-
stealc
-
default
-
http://68.183.108.129
-
url_path
/6259fdc16222e061.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- 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\91858fd31593f6bd31cd02d21097ee491766f20fcb7ba9e9a86d21d5670bdd73.exe"C:\Users\Admin\AppData\Local\Temp\91858fd31593f6bd31cd02d21097ee491766f20fcb7ba9e9a86d21d5670bdd73.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5D14.tmpC:\Users\Admin\AppData\Local\Temp\kat5D14.tmp2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
kat5D14.tmp
memory/4916-0-0x0000000002420000-0x0000000002421000-memory.dmp
memory/4916-2-0x0000000002B40000-0x0000000002C44000-memory.dmp
memory/4916-10-0x0000000000400000-0x0000000000584000-memory.dmp
memory/4960-8-0x0000000000400000-0x000000000063C000-memory.dmp
memory/4960-9-0x0000000000400000-0x000000000063C000-memory.dmp
memory/4960-4-0x0000000000400000-0x000000000063C000-memory.dmp
memory/4960-11-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4960-83-0x0000000000400000-0x000000000063C000-memory.dmp
memory/4960-84-0x0000000000400000-0x000000000063C000-memory.dmp