njrat | 3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe

General

Target

3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe
Size

142KB
MD5

f02e991e47f748452b1890c851851502
SHA1

296030748dadc40b4ecea6ff12f21de32dbc1ba7
SHA256

3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe
SHA512

3e04ccbbb5ee305835f045ca21253cb74b36b93e97ee1424d7689d88a22ff6fcf3d05c714e6412785f50f9a8920dfca8e6e87a6e1dbfe1d6482bbc20499cd0f4
SSDEEP

1536:YTTgK2ohN4WgdRKFsssssiFgmFqxDZCAwsssssv2sssEsaM+mgYjgXA3AN5cZFq7:Y/gK34RRKrdsxlUsHq0w0EH

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
4976	svchost1.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2040	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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e74cec0f65b349763c044a26938020c8.exe	svchost1.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e74cec0f65b349763c044a26938020c8.exe	svchost1.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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e74cec0f65b349763c044a26938020c8 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost1.exe\" .."	svchost1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e74cec0f65b349763c044a26938020c8 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost1.exe\" .."	svchost1.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\security.config.cch.new	3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe
File created	C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\enterprisesec.config.cch.new	3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.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 31 IoCs

description	pid	Process
Token: SeDebugPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe
Token: 33	4976	svchost1.exe
Token: SeIncBasePriorityPrivilege	4976	svchost1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1556 wrote to memory of 4976	1556	3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe	79
PID 1556 wrote to memory of 4976	1556	3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe	79
PID 4976 wrote to memory of 2040	4976	svchost1.exe	85
PID 4976 wrote to memory of 2040	4976	svchost1.exe	85

C:\Users\Admin\AppData\Local\Temp\3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe
"C:\Users\Admin\AppData\Local\Temp\3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1556
- C:\Users\Admin\AppData\Local\Temp\svchost1.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost1.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4976
- - C:\Windows\SYSTEM32\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\svchost1.exe" "svchost1.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:2040

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\Local\Temp\svchost1.exe

Filesize
142KB

MD5
f02e991e47f748452b1890c851851502

SHA1
296030748dadc40b4ecea6ff12f21de32dbc1ba7

SHA256
3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe

SHA512
3e04ccbbb5ee305835f045ca21253cb74b36b93e97ee1424d7689d88a22ff6fcf3d05c714e6412785f50f9a8920dfca8e6e87a6e1dbfe1d6482bbc20499cd0f4

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost1.exe

Filesize
142KB

MD5
f02e991e47f748452b1890c851851502

SHA1
296030748dadc40b4ecea6ff12f21de32dbc1ba7

SHA256
3d272e26f5ef378082fd12a9ad22ff4189003b5ab6062781085a7bead5fc7ffe

SHA512
3e04ccbbb5ee305835f045ca21253cb74b36b93e97ee1424d7689d88a22ff6fcf3d05c714e6412785f50f9a8920dfca8e6e87a6e1dbfe1d6482bbc20499cd0f4

Download Submit
memory/1556-132-0x00007FFFED490000-0x00007FFFEDEC6000-memory.dmp

Filesize
10.2MB

Download
memory/4976-136-0x00007FFFED490000-0x00007FFFEDEC6000-memory.dmp

Filesize
10.2MB

Download

Analysis

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