njrat | f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9

General

Target

f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe
Size

134KB
MD5

25550b693db6fc2706143d865984ebc0
SHA1

3e6aced12db538757793edf90546a130d43b2b60
SHA256

f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9
SHA512

e92d5cfd73048c94de26b35a40787e6ae4b85b4161a83cc450e4f1d7cb4fbfec4a8e9893d34f6baca1f8e9217ec595bf366ab481bbf06080ee7a08ae6d439300
SSDEEP

1536:xftEpYzptVKNxZAT6ucYKq1iaqITtO3iyN++S2vK8GeQ:lt5kNxZAT6u/KSHT1wN1va

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
4180	server.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4828	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	f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\13b744fe92a3e5c630f8f3abb1fe36d1.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\13b744fe92a3e5c630f8f3abb1fe36d1.exe	server.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\13b744fe92a3e5c630f8f3abb1fe36d1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\13b744fe92a3e5c630f8f3abb1fe36d1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.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 33 IoCs

description	pid	Process
Token: SeDebugPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe
Token: 33	4180	server.exe
Token: SeIncBasePriorityPrivilege	4180	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 4180	1800	f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe	81
PID 1800 wrote to memory of 4180	1800	f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe	81
PID 1800 wrote to memory of 4180	1800	f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe	81
PID 4180 wrote to memory of 4828	4180	server.exe	82
PID 4180 wrote to memory of 4828	4180	server.exe	82
PID 4180 wrote to memory of 4828	4180	server.exe	82

C:\Users\Admin\AppData\Local\Temp\f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe
"C:\Users\Admin\AppData\Local\Temp\f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4180
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:4828

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\server.exe

Filesize
134KB

MD5
25550b693db6fc2706143d865984ebc0

SHA1
3e6aced12db538757793edf90546a130d43b2b60

SHA256
f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9

SHA512
e92d5cfd73048c94de26b35a40787e6ae4b85b4161a83cc450e4f1d7cb4fbfec4a8e9893d34f6baca1f8e9217ec595bf366ab481bbf06080ee7a08ae6d439300

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

Filesize
134KB

MD5
25550b693db6fc2706143d865984ebc0

SHA1
3e6aced12db538757793edf90546a130d43b2b60

SHA256
f2881c0d7a49bc24ea06087961e577a3690f2fa8e25907729d9e3c711f6317e9

SHA512
e92d5cfd73048c94de26b35a40787e6ae4b85b4161a83cc450e4f1d7cb4fbfec4a8e9893d34f6baca1f8e9217ec595bf366ab481bbf06080ee7a08ae6d439300

Download Submit
memory/1800-132-0x0000000074660000-0x0000000074C11000-memory.dmp

Filesize
5.7MB

Download
memory/1800-136-0x0000000074660000-0x0000000074C11000-memory.dmp

Filesize
5.7MB

Download
memory/4180-133-0x0000000000000000-mapping.dmp

Download
memory/4180-137-0x0000000074660000-0x0000000074C11000-memory.dmp

Filesize
5.7MB

Download
memory/4180-139-0x0000000074660000-0x0000000074C11000-memory.dmp

Filesize
5.7MB

Download
memory/4828-138-0x0000000000000000-mapping.dmp

Download

Analysis

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