General
- Target Nireva.exe
- Size 613KB
- Sample261113-slc5esw15q
- SHA256 e478a60520a83a5d1421d5981f17305b2b246344f7f07094fa279b678be85db6
- MD5 9c2b8ce0bfb29ac0b269d190c2aeaf0d
- SHA1 9d93260f0367753614d0564c2d9cc032faa21469
- SHA512 e989a5b7ba8971dda8d8a45d3be9af50739e83ac8f3fff6c1e1e37f4e96baf42823ac61d90164f22044e76239d507dd6472debb91495e985ff71fb25bac18784
- SSDEEP 12288:hhCW73Y6YHzgUpCKAZvcNRrf82FP8eAMS6deYQr/X:bm6YTgUpCh1gk217ysQr/
- TLSH T1B9D4D4147B99CAC8E4501BFE455A1904DB9B99E115F2E303370AFB62CD048DEDE2D3EA
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
Nireva.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
Nireva.exe
Resource
win11ltsc2024-20260911-en
Malware Config
Targets
-
- Target Nireva.exe
- Size 613KB
- SHA256 e478a60520a83a5d1421d5981f17305b2b246344f7f07094fa279b678be85db6
- MD5 9c2b8ce0bfb29ac0b269d190c2aeaf0d
- SHA1 9d93260f0367753614d0564c2d9cc032faa21469
- SHA512 e989a5b7ba8971dda8d8a45d3be9af50739e83ac8f3fff6c1e1e37f4e96baf42823ac61d90164f22044e76239d507dd6472debb91495e985ff71fb25bac18784
- SSDEEP 12288:hhCW73Y6YHzgUpCKAZvcNRrf82FP8eAMS6deYQr/X:bm6YTgUpCh1gk217ysQr/
- TLSH T1B9D4D4147B99CAC8E4501BFE455A1904DB9B99E115F2E303370AFB62CD048DEDE2D3EA
- MD5 SHA1 SHA512 SSDEEP TLSH
Detects Dracula aka Samurai Stealer payload
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.
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
Executes dropped EXE
Loads dropped DLL
Accesses Microsoft Outlook profiles
Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
Drops file in System32 directory
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
2AppInit DLLs
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Event Triggered Execution
2AppInit DLLs
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1