Analysis
- max time kernel
108s - max time network
138s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
23/01/2023, 14:41
General
- Target bi.exe
- Size 645KB
- Sample230123-r2fd2sfc7y
- SHA256 2827acabbd8a2d0213080c3cf3855db732799cabb5254bca6764734d16549b26
Malware Config
Signatures
- Executes dropped EXE 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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SendNotifyMessage 2 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\bi.exe"C:\Users\Admin\AppData\Local\Temp\bi.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\drgahhk.exe"C:\Users\Admin\AppData\Local\Temp\drgahhk.exe" "C:\Users\Admin\AppData\Local\Temp\ugxysejr.au3"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\drgahhk.exe"C:\Users\Admin\AppData\Local\Temp\drgahhk.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
drgahhk.exe
drgahhk.exe
drgahhk.exe
ugxysejr.au3
xzfuncm.a
yonooghf.ms
memory/1952-140-0x0000000006530000-0x0000000006AD4000-memory.dmp
memory/1952-141-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1952-142-0x00000000033A0000-0x0000000003406000-memory.dmp
memory/1952-143-0x00000000082D0000-0x0000000008362000-memory.dmp
memory/1952-144-0x0000000008290000-0x000000000829A000-memory.dmp
memory/1952-145-0x00000000083C0000-0x0000000008410000-memory.dmp
memory/1952-146-0x0000000008680000-0x0000000008842000-memory.dmp