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Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
21/01/2024, 04:23
Static task
static1
Behavioral task
behavioral1
Sample
6c579929873c53c8aeac1eec5fd9cd43.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
6c579929873c53c8aeac1eec5fd9cd43.exe
Resource
win10v2004-20231222-en
General
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Target
6c579929873c53c8aeac1eec5fd9cd43.exe
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Size
40KB
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MD5
6c579929873c53c8aeac1eec5fd9cd43
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SHA1
dd1bb4131e623621167f7787e502901b3dc290e7
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SHA256
ca1cfa6d6fbad23c5096a460c845a4426eda5895b24db04b562253d29332e866
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SHA512
7f9707963f6a27fb13329f705664749bf68905d5d12dbb2c546d425520c65a41cd1e82f894ff3c805c46b97de01126e2cd12b452ee9beffa232ec32e540bba28
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SSDEEP
768:ohaBfpq3Q+FpWCvSO9qO37Z7duyJS2IrW2w88WkKeH:oUeA+FpHjqO3t7duwS2f889KeH
Malware Config
Extracted
njrat
0.7d
HacKed
winfix.ddns.net:2655
c544fdd3a27573c904e8127ab07c610e
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reg_key
c544fdd3a27573c904e8127ab07c610e
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splitter
|'|'|
Signatures
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Modifies Windows Firewall 1 TTPs 1 IoCs
pid Process 1464 netsh.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 6c579929873c53c8aeac1eec5fd9cd43.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\c544fdd3a27573c904e8127ab07c610e.exe winhelper.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\c544fdd3a27573c904e8127ab07c610e.exe winhelper.exe -
Executes dropped EXE 1 IoCs
pid Process 3764 winhelper.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\c544fdd3a27573c904e8127ab07c610e = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\winhelper.exe\" .." winhelper.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\c544fdd3a27573c904e8127ab07c610e = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\winhelper.exe\" .." winhelper.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 35 IoCs
description pid Process Token: SeDebugPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe Token: 33 3764 winhelper.exe Token: SeIncBasePriorityPrivilege 3764 winhelper.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4884 wrote to memory of 3764 4884 6c579929873c53c8aeac1eec5fd9cd43.exe 99 PID 4884 wrote to memory of 3764 4884 6c579929873c53c8aeac1eec5fd9cd43.exe 99 PID 3764 wrote to memory of 1464 3764 winhelper.exe 104 PID 3764 wrote to memory of 1464 3764 winhelper.exe 104
Processes
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C:\Users\Admin\AppData\Local\Temp\6c579929873c53c8aeac1eec5fd9cd43.exe"C:\Users\Admin\AppData\Local\Temp\6c579929873c53c8aeac1eec5fd9cd43.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4884 -
C:\Users\Admin\AppData\Local\Temp\winhelper.exe"C:\Users\Admin\AppData\Local\Temp\winhelper.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3764 -
C:\Windows\SYSTEM32\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\winhelper.exe" "winhelper.exe" ENABLE3⤵
- Modifies Windows Firewall
PID:1464
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
40KB
MD56c579929873c53c8aeac1eec5fd9cd43
SHA1dd1bb4131e623621167f7787e502901b3dc290e7
SHA256ca1cfa6d6fbad23c5096a460c845a4426eda5895b24db04b562253d29332e866
SHA5127f9707963f6a27fb13329f705664749bf68905d5d12dbb2c546d425520c65a41cd1e82f894ff3c805c46b97de01126e2cd12b452ee9beffa232ec32e540bba28