General
- Target Client.exe
- Size 549KB
- Sample261018-nc13nsae67
- SHA256 2b2b2543eeb29a31f989e09a84717176ee8bebad7f31a7e02d1606c7381db854
- MD5 a3cfdef3c5fede25bc7a644ca837ce54
- SHA1 fd7d2fa2d0a7a161d0a017846fd86434a6938e53
- SHA512 63fd4ae8567626c7df5511732eae40a5a915b6a6fdbdf5348b7eacaed3642cb28cc42069f3ddfc942ed798ec02d0062c5436dc73b9ecfacc1ffd53a45872c8c7
- SSDEEP 12288:bbag6zxRDaMePVle8ZB4bD9XU1hxyN/3X:bbaNxRDbaOpU1EX
- TLSH T1D2C4B51DFE81F809DE2A3E73CFE920145B7121C16E22924621596FFD87663B358E267C
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
Client.exe
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral2
Sample
Client.exe
Resource
win11ltsc2024-20260911-en
Malware Config
Extracted
-
sheetrat
-
Sheet_nbszmiyxtax
-
t82vhiny4s.localto.net:3153
Targets
-
- Target Client.exe
- Size 549KB
- SHA256 2b2b2543eeb29a31f989e09a84717176ee8bebad7f31a7e02d1606c7381db854
- MD5 a3cfdef3c5fede25bc7a644ca837ce54
- SHA1 fd7d2fa2d0a7a161d0a017846fd86434a6938e53
- SHA512 63fd4ae8567626c7df5511732eae40a5a915b6a6fdbdf5348b7eacaed3642cb28cc42069f3ddfc942ed798ec02d0062c5436dc73b9ecfacc1ffd53a45872c8c7
- SSDEEP 12288:bbag6zxRDaMePVle8ZB4bD9XU1hxyN/3X:bbaNxRDbaOpU1EX
- TLSH T1D2C4B51DFE81F809DE2A3E73CFE920145B7121C16E22924621596FFD87663B358E267C
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Detects Sheetrat obfuscated V1.8 and higher
Sheetrat aka NonEuclid RAT is a trojan written in C#.
-
Detects Sheetrat obfuscated version
-
Modifies WinLogon for persistence
-
Event Triggered Execution: AppInit DLLs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
-
Loads dropped DLL
-
Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
-
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1