njrat | e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00

General

Target

e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe
Size

45KB
MD5

c4c4bcf2646caf649c30f037f4e6065f
SHA1

2ccd7762f43c258aef4fe5160239e7251962412e
SHA256

e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00
SHA512

8bb05f80a457e2fd8695d870544d30fe069fb200198fe7102b6b284e405efbe7bd622c6ff9863e58790a87f024cc23916eeb4d9b5547afa05d08285756dae265
SSDEEP

768:qkBy+xPvm5dxZj3B95Jr8qHUiljyEPdr/F05ccxGhZhzooqRrIbH:qkMRdxZLB95Jwot7Pd7EGfhkoqVI

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Executes dropped EXE 1 IoCs

pid	Process
4072	sys32.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4580	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9204272cb5f1d2d37625bec6891bc1c4.exe	sys32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9204272cb5f1d2d37625bec6891bc1c4.exe	sys32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9204272cb5f1d2d37625bec6891bc1c4 = "\"C:\\Users\\Admin\\AppData\\Roaming\\sys32.exe\" .."	sys32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\9204272cb5f1d2d37625bec6891bc1c4 = "\"C:\\Users\\Admin\\AppData\\Roaming\\sys32.exe\" .."	sys32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 19 IoCs

description	pid	Process
Token: SeDebugPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe
Token: 33	4072	sys32.exe
Token: SeIncBasePriorityPrivilege	4072	sys32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 4072	2020	e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe	83
PID 2020 wrote to memory of 4072	2020	e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe	83
PID 2020 wrote to memory of 4072	2020	e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe	83
PID 4072 wrote to memory of 4580	4072	sys32.exe	88
PID 4072 wrote to memory of 4580	4072	sys32.exe	88
PID 4072 wrote to memory of 4580	4072	sys32.exe	88

C:\Users\Admin\AppData\Local\Temp\e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe
"C:\Users\Admin\AppData\Local\Temp\e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Users\Admin\AppData\Roaming\sys32.exe
  "C:\Users\Admin\AppData\Roaming\sys32.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4072
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\sys32.exe" "sys32.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:4580

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\sys32.exe

Filesize
45KB

MD5
c4c4bcf2646caf649c30f037f4e6065f

SHA1
2ccd7762f43c258aef4fe5160239e7251962412e

SHA256
e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00

SHA512
8bb05f80a457e2fd8695d870544d30fe069fb200198fe7102b6b284e405efbe7bd622c6ff9863e58790a87f024cc23916eeb4d9b5547afa05d08285756dae265

Download Submit
C:\Users\Admin\AppData\Roaming\sys32.exe

Filesize
45KB

MD5
c4c4bcf2646caf649c30f037f4e6065f

SHA1
2ccd7762f43c258aef4fe5160239e7251962412e

SHA256
e8f0b67861705801676cf4ad8edddcc6ee3233d4aa367ea3191bc8a080a49e00

SHA512
8bb05f80a457e2fd8695d870544d30fe069fb200198fe7102b6b284e405efbe7bd622c6ff9863e58790a87f024cc23916eeb4d9b5547afa05d08285756dae265

Download Submit
memory/2020-132-0x0000000074F70000-0x0000000075521000-memory.dmp

Filesize
5.7MB

Download
memory/2020-136-0x0000000074F70000-0x0000000075521000-memory.dmp

Filesize
5.7MB

Download
memory/4072-137-0x0000000074F70000-0x0000000075521000-memory.dmp

Filesize
5.7MB

Download
memory/4072-138-0x0000000074F70000-0x0000000075521000-memory.dmp

Filesize
5.7MB

Download

Analysis

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