Analysis
- max time kernel
148s - max time network
144s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
24/10/2026, 17:16
General
- Target CREBTER 2018.exe
- Size 1022KB
- Sample261024-vs5t5abs3s
- SHA256 d14c5940b163dda50170276c84997033990e0797a2382be569dd706351d9376c
Malware Config
Extracted
-
umbral
-
v1.3
-
https://discord.com/api/webhooks/1537631553251704915/pYjuZXSVqFJF8UDGNGHbS13FUlJA2WvuLsGU39gflbIsE9iTkJ1qFg8UBZttARkB32aJ
Signatures
- Family: Umbral
Umbral stealer is an open-source modular stealer written in C#.
- Detects Umbral payload 4 IoCs
- Executes dropped EXE 2 IoCs
- Looks up external IP address via web service 1 TTPs 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Queries system WMI classes for hardware identifiers 2 TTPs 1 IoCs
Uses WMI to read hardware serial numbers or the system UUID, commonly used to fingerprint the victim machine.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 43 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\CREBTER 2018.exe"C:\Users\Admin\AppData\Local\Temp\CREBTER 2018.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\1.exe"C:\Users\Admin\AppData\Roaming\1.exe"2⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid3⤵
- Queries system WMI classes for hardware identifiers
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
-
C:\Users\Admin\AppData\Roaming\unpacker.exe"C:\Users\Admin\AppData\Roaming\unpacker.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
1.exe
unpacker.exe
memory/4184-32-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-28-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-39-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-34-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-17-0x000002CBC15C0000-0x000002CBC1600000-memory.dmp
memory/4184-36-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-27-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-37-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-35-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-33-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-31-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/4184-30-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/5588-0-0x00007FFF1A7AF000-0x00007FFF1A7B0000-memory.dmp
memory/5588-20-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/5588-8-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/5588-23-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/5588-18-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/5588-1-0x00000000004B0000-0x00000000005B6000-memory.dmp
memory/5588-2-0x00007FFF1A620000-0x00007FFF1AFC4000-memory.dmp
memory/5776-29-0x0000000004F10000-0x0000000004F1A000-memory.dmp
memory/5776-26-0x0000000004F60000-0x0000000004FF2000-memory.dmp
memory/5776-25-0x0000000005480000-0x0000000005A3A000-memory.dmp
memory/5776-24-0x0000000000450000-0x000000000051A000-memory.dmp
memory/5776-38-0x00000000745B2000-0x00000000745B3000-memory.dmp