Analysis
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max time kernel
187s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
20-05-2022 23:19
Behavioral task
behavioral1
Sample
053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe
Resource
win10v2004-20220414-en
General
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Target
053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe
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Size
23KB
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MD5
a81fbdcd88ec62ad6a264e21e7634738
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SHA1
51dae7eb156317ee935dfb82050b135da0288e30
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SHA256
053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c
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SHA512
a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b
Malware Config
Extracted
njrat
0.7d
Fast.exe
127.0.0.1:3158
59a4c7d5a45bd632bb2583e1dc4664dd
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reg_key
59a4c7d5a45bd632bb2583e1dc4664dd
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splitter
|'|'|
Signatures
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Executes dropped EXE 1 IoCs
Processes:
Fast.exepid process 2000 Fast.exe -
Modifies Windows Firewall 1 TTPs
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Loads dropped DLL 1 IoCs
Processes:
053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exepid process 1344 053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
Fast.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\59a4c7d5a45bd632bb2583e1dc4664dd = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Fast.exe\" .." Fast.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\59a4c7d5a45bd632bb2583e1dc4664dd = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Fast.exe\" .." Fast.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of AdjustPrivilegeToken 17 IoCs
Processes:
Fast.exedescription pid process Token: SeDebugPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe Token: 33 2000 Fast.exe Token: SeIncBasePriorityPrivilege 2000 Fast.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exeFast.exedescription pid process target process PID 1344 wrote to memory of 2000 1344 053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe Fast.exe PID 1344 wrote to memory of 2000 1344 053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe Fast.exe PID 1344 wrote to memory of 2000 1344 053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe Fast.exe PID 1344 wrote to memory of 2000 1344 053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe Fast.exe PID 2000 wrote to memory of 1688 2000 Fast.exe netsh.exe PID 2000 wrote to memory of 1688 2000 Fast.exe netsh.exe PID 2000 wrote to memory of 1688 2000 Fast.exe netsh.exe PID 2000 wrote to memory of 1688 2000 Fast.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe"C:\Users\Admin\AppData\Local\Temp\053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Fast.exe"C:\Users\Admin\AppData\Local\Temp\Fast.exe"2⤵
- 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\Fast.exe" "Fast.exe" ENABLE3⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\Fast.exeFilesize
23KB
MD5a81fbdcd88ec62ad6a264e21e7634738
SHA151dae7eb156317ee935dfb82050b135da0288e30
SHA256053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c
SHA512a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b
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C:\Users\Admin\AppData\Local\Temp\Fast.exeFilesize
23KB
MD5a81fbdcd88ec62ad6a264e21e7634738
SHA151dae7eb156317ee935dfb82050b135da0288e30
SHA256053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c
SHA512a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b
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\Users\Admin\AppData\Local\Temp\Fast.exeFilesize
23KB
MD5a81fbdcd88ec62ad6a264e21e7634738
SHA151dae7eb156317ee935dfb82050b135da0288e30
SHA256053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c
SHA512a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b
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memory/1344-54-0x00000000761F1000-0x00000000761F3000-memory.dmpFilesize
8KB
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memory/1344-55-0x0000000074AE0000-0x000000007508B000-memory.dmpFilesize
5.7MB
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memory/1688-62-0x0000000000000000-mapping.dmp
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memory/2000-57-0x0000000000000000-mapping.dmp
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memory/2000-61-0x0000000074AE0000-0x000000007508B000-memory.dmpFilesize
5.7MB