Analysis
- max time kernel
143s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
15/01/2024, 07:26
General
- Target 7db8125b22e50160dc9415589d0dd849.exe
- Size 332KB
- Sample240115-h9hppscfd7
- SHA256 d7959915fe8fbcb40b99fd599db914143a239cbd48992d2ad6bbd24909e1f5bf
Malware Config
Extracted
-
stealc
-
http://185.172.128.24
-
url_path
/40d570f44e84a454.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\7db8125b22e50160dc9415589d0dd849.exe"C:\Users\Admin\AppData\Local\Temp\7db8125b22e50160dc9415589d0dd849.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\7db8125b22e50160dc9415589d0dd849.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 24642⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4808 -ip 48081⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
mozglue.dll
nss3.dll
memory/4808-4-0x0000000000400000-0x0000000000875000-memory.dmp
memory/4808-47-0x0000000000400000-0x0000000000875000-memory.dmp
memory/4808-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4808-1-0x00000000009C0000-0x0000000000AC0000-memory.dmp
memory/4808-3-0x0000000000400000-0x0000000000875000-memory.dmp
memory/4808-77-0x00000000009C0000-0x0000000000AC0000-memory.dmp
memory/4808-78-0x00000000009A0000-0x00000000009BC000-memory.dmp
memory/4808-87-0x0000000000400000-0x0000000000875000-memory.dmp
memory/4808-88-0x0000000000400000-0x0000000000875000-memory.dmp
memory/4808-2-0x00000000009A0000-0x00000000009BC000-memory.dmp
memory/4808-98-0x0000000000400000-0x0000000000875000-memory.dmp