Analysis
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max time kernel
149s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20231130-en -
resource tags
arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system -
submitted
03-12-2023 12:42
Behavioral task
behavioral1
Sample
s.exe
Resource
win7-20231201-en
Behavioral task
behavioral2
Sample
s.exe
Resource
win10v2004-20231130-en
General
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Target
s.exe
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Size
23KB
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MD5
4d0542e1d74a6be9dae377b16ddacc17
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SHA1
cb0e366897672385e2bcad2a8c98b038a8b6cd99
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SHA256
91997affc537134c5dcef64236568d14974ae3f5b4e2e3cf2330a6c0a2cd8c67
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SHA512
645594fc8e9823ca68e0cd70e60022b330c1b233a4e2938579b4ca7010bfa62d36e1300070d68f25c7af3c43c3e1742036ab6f81971880e239069bfe9e7e993e
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SSDEEP
384:zslUlEvOEJ8xWwYJOMiOBZEdj1567gtwi5HhbQmRvR6JZlbw8hqIusZzZ0Hk:EeEvwIlLMRpcnuxE
Malware Config
Extracted
njrat
0.7d
HacKed
43.249.38.36:5552
1c214698f485e7d0799a81ebc3c171f7
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reg_key
1c214698f485e7d0799a81ebc3c171f7
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splitter
|'|'|
Signatures
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Modifies Windows Firewall 1 TTPs 1 IoCs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
s.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-423100829-2271632622-1028104103-1000\Control Panel\International\Geo\Nation s.exe -
Drops startup file 2 IoCs
Processes:
spur.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1c214698f485e7d0799a81ebc3c171f7.exe spur.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1c214698f485e7d0799a81ebc3c171f7.exe spur.exe -
Executes dropped EXE 1 IoCs
Processes:
spur.exepid process 900 spur.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
spur.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-423100829-2271632622-1028104103-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\1c214698f485e7d0799a81ebc3c171f7 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\spur.exe\" .." spur.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\1c214698f485e7d0799a81ebc3c171f7 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\spur.exe\" .." spur.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
Processes:
spur.exedescription pid process Token: SeDebugPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe Token: 33 900 spur.exe Token: SeIncBasePriorityPrivilege 900 spur.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
s.exespur.exedescription pid process target process PID 876 wrote to memory of 900 876 s.exe spur.exe PID 876 wrote to memory of 900 876 s.exe spur.exe PID 876 wrote to memory of 900 876 s.exe spur.exe PID 900 wrote to memory of 1540 900 spur.exe netsh.exe PID 900 wrote to memory of 1540 900 spur.exe netsh.exe PID 900 wrote to memory of 1540 900 spur.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\s.exe"C:\Users\Admin\AppData\Local\Temp\s.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\spur.exe"C:\Users\Admin\AppData\Local\Temp\spur.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\spur.exe" "spur.exe" ENABLE3⤵
- Modifies Windows Firewall
Network
MITRE ATT&CK Matrix ATT&CK v13
Persistence
Create or Modify System Process
1Windows Service
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\spur.exeFilesize
23KB
MD54d0542e1d74a6be9dae377b16ddacc17
SHA1cb0e366897672385e2bcad2a8c98b038a8b6cd99
SHA25691997affc537134c5dcef64236568d14974ae3f5b4e2e3cf2330a6c0a2cd8c67
SHA512645594fc8e9823ca68e0cd70e60022b330c1b233a4e2938579b4ca7010bfa62d36e1300070d68f25c7af3c43c3e1742036ab6f81971880e239069bfe9e7e993e
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C:\Users\Admin\AppData\Local\Temp\spur.exeFilesize
23KB
MD54d0542e1d74a6be9dae377b16ddacc17
SHA1cb0e366897672385e2bcad2a8c98b038a8b6cd99
SHA25691997affc537134c5dcef64236568d14974ae3f5b4e2e3cf2330a6c0a2cd8c67
SHA512645594fc8e9823ca68e0cd70e60022b330c1b233a4e2938579b4ca7010bfa62d36e1300070d68f25c7af3c43c3e1742036ab6f81971880e239069bfe9e7e993e
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C:\Users\Admin\AppData\Local\Temp\spur.exeFilesize
23KB
MD54d0542e1d74a6be9dae377b16ddacc17
SHA1cb0e366897672385e2bcad2a8c98b038a8b6cd99
SHA25691997affc537134c5dcef64236568d14974ae3f5b4e2e3cf2330a6c0a2cd8c67
SHA512645594fc8e9823ca68e0cd70e60022b330c1b233a4e2938579b4ca7010bfa62d36e1300070d68f25c7af3c43c3e1742036ab6f81971880e239069bfe9e7e993e
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memory/876-0-0x0000000075360000-0x0000000075911000-memory.dmpFilesize
5.7MB
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memory/876-1-0x0000000000AC0000-0x0000000000AD0000-memory.dmpFilesize
64KB
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memory/876-2-0x0000000075360000-0x0000000075911000-memory.dmpFilesize
5.7MB
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memory/876-12-0x0000000075360000-0x0000000075911000-memory.dmpFilesize
5.7MB
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memory/900-13-0x0000000075360000-0x0000000075911000-memory.dmpFilesize
5.7MB
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memory/900-15-0x0000000075360000-0x0000000075911000-memory.dmpFilesize
5.7MB
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memory/900-16-0x0000000001520000-0x0000000001530000-memory.dmpFilesize
64KB