Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
18-06-2022 20:54
Behavioral task
behavioral1
Sample
tmpE1B.tmp.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
tmpE1B.tmp.exe
Resource
win10v2004-20220414-en
General
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Target
tmpE1B.tmp.exe
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Size
37KB
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MD5
73196f394725a9623d84a512cdddf6ce
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SHA1
4d24d92f70b2cbce52b1b173162b8f504ee7752f
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SHA256
ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4
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SHA512
9c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6
Malware Config
Extracted
njrat
im523
NEXT
109.197.196.135:9991
413491cbe232876548b9b7cd8a1b451d
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reg_key
413491cbe232876548b9b7cd8a1b451d
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splitter
|'|'|
Signatures
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Executes dropped EXE 1 IoCs
Processes:
dllhost.exepid process 3776 dllhost.exe -
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:
tmpE1B.tmp.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation tmpE1B.tmp.exe -
Drops startup file 2 IoCs
Processes:
dllhost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\413491cbe232876548b9b7cd8a1b451d.exe dllhost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\413491cbe232876548b9b7cd8a1b451d.exe dllhost.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
dllhost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\413491cbe232876548b9b7cd8a1b451d = "\"C:\\Users\\Admin\\AppData\\Roaming\\dllhost.exe\" .." dllhost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\413491cbe232876548b9b7cd8a1b451d = "\"C:\\Users\\Admin\\AppData\\Roaming\\dllhost.exe\" .." dllhost.exe -
Drops autorun.inf file 1 TTPs 3 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
Processes:
dllhost.exedescription ioc process File created C:\autorun.inf dllhost.exe File opened for modification C:\autorun.inf dllhost.exe File created D:\autorun.inf dllhost.exe -
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:
dllhost.exepid process 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe 3776 dllhost.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
dllhost.exepid process 3776 dllhost.exe -
Suspicious use of AdjustPrivilegeToken 35 IoCs
Processes:
dllhost.exedescription pid process Token: SeDebugPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe Token: 33 3776 dllhost.exe Token: SeIncBasePriorityPrivilege 3776 dllhost.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
tmpE1B.tmp.exedllhost.exedescription pid process target process PID 5016 wrote to memory of 3776 5016 tmpE1B.tmp.exe dllhost.exe PID 5016 wrote to memory of 3776 5016 tmpE1B.tmp.exe dllhost.exe PID 5016 wrote to memory of 3776 5016 tmpE1B.tmp.exe dllhost.exe PID 3776 wrote to memory of 5056 3776 dllhost.exe netsh.exe PID 3776 wrote to memory of 5056 3776 dllhost.exe netsh.exe PID 3776 wrote to memory of 5056 3776 dllhost.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmpE1B.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmpE1B.tmp.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\dllhost.exe"C:\Users\Admin\AppData\Roaming\dllhost.exe"2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Drops autorun.inf file
- 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\Roaming\dllhost.exe" "dllhost.exe" ENABLE3⤵
- Modifies Windows Firewall
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\dllhost.exeFilesize
37KB
MD573196f394725a9623d84a512cdddf6ce
SHA14d24d92f70b2cbce52b1b173162b8f504ee7752f
SHA256ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4
SHA5129c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6
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C:\Users\Admin\AppData\Roaming\dllhost.exeFilesize
37KB
MD573196f394725a9623d84a512cdddf6ce
SHA14d24d92f70b2cbce52b1b173162b8f504ee7752f
SHA256ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4
SHA5129c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6
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memory/3776-131-0x0000000000000000-mapping.dmp
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memory/3776-135-0x0000000075000000-0x00000000755B1000-memory.dmpFilesize
5.7MB
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memory/3776-137-0x0000000075000000-0x00000000755B1000-memory.dmpFilesize
5.7MB
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memory/5016-130-0x0000000075000000-0x00000000755B1000-memory.dmpFilesize
5.7MB
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memory/5016-134-0x0000000075000000-0x00000000755B1000-memory.dmpFilesize
5.7MB
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memory/5056-136-0x0000000000000000-mapping.dmp