Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 16:19
Behavioral task
behavioral1
Sample
0x000b000000003c9f-55.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
0x000b000000003c9f-55.exe
Resource
win10v2004-20220414-en
General
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Target
0x000b000000003c9f-55.exe
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Size
37KB
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MD5
05d1abc69e538eb3c86bfeacc33c2a10
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SHA1
f424222562968f86d5d043cce57b1a0389061150
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SHA256
cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918
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SHA512
e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526
Malware Config
Extracted
njrat
im523
WormRATT
178.33.93.88:1742
7869d44e9b90d6b1e669bf52c9e89c61
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reg_key
7869d44e9b90d6b1e669bf52c9e89c61
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splitter
|'|'|
Signatures
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Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 4488 svchost.exe -
Modifies Windows Firewall 1 TTPs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
0x000b000000003c9f-55.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation 0x000b000000003c9f-55.exe -
Drops startup file 2 IoCs
Processes:
svchost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7869d44e9b90d6b1e669bf52c9e89c61.exe svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7869d44e9b90d6b1e669bf52c9e89c61.exe svchost.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\7869d44e9b90d6b1e669bf52c9e89c61 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe\" .." svchost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\7869d44e9b90d6b1e669bf52c9e89c61 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe\" .." svchost.exe -
Drops autorun.inf file 1 TTPs
Malware can abuse Windows Autorun to spread further via attached volumes.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
svchost.exepid process 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe 4488 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
svchost.exepid process 4488 svchost.exe -
Suspicious use of AdjustPrivilegeToken 35 IoCs
Processes:
svchost.exedescription pid process Token: SeDebugPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe Token: 33 4488 svchost.exe Token: SeIncBasePriorityPrivilege 4488 svchost.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
0x000b000000003c9f-55.exesvchost.exedescription pid process target process PID 3700 wrote to memory of 4488 3700 0x000b000000003c9f-55.exe svchost.exe PID 3700 wrote to memory of 4488 3700 0x000b000000003c9f-55.exe svchost.exe PID 3700 wrote to memory of 4488 3700 0x000b000000003c9f-55.exe svchost.exe PID 4488 wrote to memory of 260 4488 svchost.exe netsh.exe PID 4488 wrote to memory of 260 4488 svchost.exe netsh.exe PID 4488 wrote to memory of 260 4488 svchost.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\0x000b000000003c9f-55.exe"C:\Users\Admin\AppData\Local\Temp\0x000b000000003c9f-55.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\svchost.exe"C:\Users\Admin\AppData\Local\Temp\svchost.exe"2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- 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\svchost.exe" "svchost.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\svchost.exeFilesize
37KB
MD505d1abc69e538eb3c86bfeacc33c2a10
SHA1f424222562968f86d5d043cce57b1a0389061150
SHA256cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918
SHA512e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526
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C:\Users\Admin\AppData\Local\Temp\svchost.exeFilesize
37KB
MD505d1abc69e538eb3c86bfeacc33c2a10
SHA1f424222562968f86d5d043cce57b1a0389061150
SHA256cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918
SHA512e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526
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memory/260-135-0x0000000000000000-mapping.dmp
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memory/3700-130-0x0000000074A60000-0x0000000075011000-memory.dmpFilesize
5.7MB
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memory/4488-131-0x0000000000000000-mapping.dmp
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memory/4488-134-0x0000000074A60000-0x0000000075011000-memory.dmpFilesize
5.7MB