Analysis
- max time kernel
113s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
30/03/2023, 07:27
General
- Target OPH21.bat.exe
- Size 622KB
- Sample230330-h94beada4t
- SHA256 2c02e5bec85fedefe1d21d2cc02b0d7e91eebfedcb53f444127463987de67bc0
Malware Config
Extracted
-
snakekeylogger
-
Protocol
smtp
-
Host
mail.eversafe.pt
-
Port
587
-
Username
-
Password
Ev3rsaf3_2021
-
Email to
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
- Snake Keylogger payload 2 IoCs
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Loads dropped DLL 2 IoCs
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\OPH21.bat.exe"C:\Users\Admin\AppData\Local\Temp\OPH21.bat.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\OPH21.bat.exe"2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 23043⤵
- Program crash
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4916 -ip 49161⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
AdvSplash.dll
System.dll
memory/2300-148-0x00000000049C0000-0x0000000006AC2000-memory.dmp
memory/2300-149-0x00000000049C0000-0x0000000006AC2000-memory.dmp
memory/4916-150-0x0000000000F00000-0x0000000003002000-memory.dmp
memory/4916-151-0x0000000000F00000-0x0000000003002000-memory.dmp
memory/4916-164-0x0000000000400000-0x000000000062B000-memory.dmp
memory/4916-165-0x0000000000F00000-0x0000000003002000-memory.dmp
memory/4916-166-0x0000000000400000-0x0000000000426000-memory.dmp
memory/4916-167-0x00000000363B0000-0x0000000036954000-memory.dmp
memory/4916-168-0x0000000035E00000-0x0000000035E9C000-memory.dmp
memory/4916-169-0x0000000036010000-0x0000000036020000-memory.dmp
memory/4916-171-0x0000000000F00000-0x0000000003002000-memory.dmp