Analysis
- max time kernel
146s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
26/10/2024, 11:19
General
- Target c56D7_Receipt.vbs
- Size 130KB
- Sample241026-netrdatdnc
- SHA256 30c4d81a0075e27984f768fa73c43240f5b14724a84a5057c15c99114b4aac15
Malware Config
Extracted
-
xworm
-
3.1
-
xwor3july.duckdns.org:9402
-
JIs7HXfvmVwG8wtR
-
install_file
USB.exe
Signatures
- Detect Xworm Payload 1 IoCs
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Xworm
Xworm is a remote access trojan written in C#.
- Xworm family
- Blocklisted process makes network request 1 IoCs
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Drops file in System32 directory 1 IoCs
- 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).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- NSIS installer 2 IoCs
- Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\c56D7_Receipt.vbs"1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\filaucioso.bat"C:\ProgramData\filaucioso.bat"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\filaucioso.bat"C:\ProgramData\filaucioso.bat"3⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
filaucioso.bat
nsaBB15.tmp
nsaBB15.tmp
nsaBB15.tmp
nsgBC20.tmp
nskB9CB.tmp
nskB9CB.tmp
nskB9CB.tmp
nskB9CB.tmp
nskB9CB.tmp
nskB9CB.tmp
System.dll
nswBD1B.tmp
nswBD1B.tmp
nswBD1B.tmp
nswBD1B.tmp
nswBD1B.tmp
memory/3404-587-0x0000000004D90000-0x0000000006424000-memory.dmp
memory/3404-588-0x00000000770B1000-0x00000000771D1000-memory.dmp
memory/3404-589-0x0000000073D04000-0x0000000073D05000-memory.dmp
memory/3404-591-0x0000000004D90000-0x0000000006424000-memory.dmp
memory/3820-599-0x0000000000800000-0x0000000001A54000-memory.dmp
memory/3820-600-0x0000000000800000-0x000000000080E000-memory.dmp
memory/3820-601-0x0000000035C30000-0x0000000035CCC000-memory.dmp
memory/3820-603-0x00000000361A0000-0x0000000036744000-memory.dmp
memory/3820-604-0x0000000035DD0000-0x0000000035E62000-memory.dmp
memory/3820-605-0x0000000035E70000-0x0000000035E7A000-memory.dmp
memory/3820-607-0x0000000036850000-0x00000000368B6000-memory.dmp