Analysis
- max time kernel
142s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20250610-en - resource tags
- submitted
02/07/2025, 04:24
General
- Target Factura.pdf.exe
- Size 1.4MB
- Sample250702-e1rdpssnz7
- SHA256 d4ef07a0aa3a3deb3bac17915190bc6901199958a0e15311f1e11ffe544dc950
Malware Config
Extracted
-
vipkeylogger
-
Protocol
smtp
-
Host
smtp.ionos.es
-
Port
587
-
Username
-
Password
.ML2023arSn.
-
Email to
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
- Vipkeylogger family
- Loads dropped DLL 6 IoCs
- 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 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Looks up external IP address via web service 3 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
- Drops file in Program Files directory 1 IoCs
- Browser Information Discovery 1 TTPs
Enumerate browser information.
- 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.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Factura.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Factura.pdf.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Factura.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Factura.pdf.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v16
Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
LangDLL.dll
System.dll
memory/2604-65-0x00000000776E9000-0x00000000776EA000-memory.dmp
memory/2604-61-0x0000000034E80000-0x0000000035424000-memory.dmp
memory/2604-72-0x0000000035F20000-0x0000000035F2A000-memory.dmp
memory/2604-48-0x0000000077648000-0x0000000077649000-memory.dmp
memory/2604-49-0x00000000776E9000-0x00000000776EA000-memory.dmp
memory/2604-59-0x00000000004B0000-0x0000000001704000-memory.dmp
memory/2604-60-0x00000000004B0000-0x00000000004F8000-memory.dmp
memory/2604-71-0x0000000035E40000-0x0000000035ED2000-memory.dmp
memory/2604-62-0x0000000035530000-0x00000000355CC000-memory.dmp
memory/2604-63-0x0000000001710000-0x0000000002490000-memory.dmp
memory/2604-69-0x00000000328D0000-0x0000000032920000-memory.dmp
memory/2604-68-0x0000000035B70000-0x0000000035D32000-memory.dmp
memory/5012-45-0x00000000049D0000-0x0000000005750000-memory.dmp
memory/5012-46-0x00000000742A5000-0x00000000742A6000-memory.dmp
memory/5012-47-0x00000000049D0000-0x0000000005750000-memory.dmp