njrat | bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33

General

Target

bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe
Size

281KB
MD5

1d9eff99ab6fb0c021103eb08eeb5990
SHA1

826e83a19de828c699fc8bb8d068d9874c6d7ad6
SHA256

bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33
SHA512

3255923d93b679fb5aca8d0d61b73d74410be723b0478847a432e587e5a38b87eac5c3640f8a9fcf264dea95f60d989358bf34ec6247704243f8bc9fae24a4fb
SSDEEP

768:aIvCOcOvSLaZ1UaZ1/GJGNxjRuSLA7CvUH8D8Fg9Xx5tw1F:L6ESW/b//GIrjR5LWNZC9XpwP

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
4664	skype.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
3108	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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\260d4ec5ffa107d730ba24a134b4844e.exe	skype.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\260d4ec5ffa107d730ba24a134b4844e.exe	skype.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\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\260d4ec5ffa107d730ba24a134b4844e = "\"C:\\Users\\Admin\\AppData\\Roaming\\skype.exe\" .."	skype.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\260d4ec5ffa107d730ba24a134b4844e = "\"C:\\Users\\Admin\\AppData\\Roaming\\skype.exe\" .."	skype.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	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe
Token: 33	4664	skype.exe
Token: SeIncBasePriorityPrivilege	4664	skype.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 4664	2828	bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe	85
PID 2828 wrote to memory of 4664	2828	bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe	85
PID 2828 wrote to memory of 4664	2828	bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe	85
PID 4664 wrote to memory of 3108	4664	skype.exe	88
PID 4664 wrote to memory of 3108	4664	skype.exe	88
PID 4664 wrote to memory of 3108	4664	skype.exe	88

C:\Users\Admin\AppData\Local\Temp\bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe
"C:\Users\Admin\AppData\Local\Temp\bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Users\Admin\AppData\Roaming\skype.exe
  "C:\Users\Admin\AppData\Roaming\skype.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\skype.exe" "skype.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:3108

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\skype.exe

Filesize
281KB

MD5
1d9eff99ab6fb0c021103eb08eeb5990

SHA1
826e83a19de828c699fc8bb8d068d9874c6d7ad6

SHA256
bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33

SHA512
3255923d93b679fb5aca8d0d61b73d74410be723b0478847a432e587e5a38b87eac5c3640f8a9fcf264dea95f60d989358bf34ec6247704243f8bc9fae24a4fb

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

Filesize
281KB

MD5
1d9eff99ab6fb0c021103eb08eeb5990

SHA1
826e83a19de828c699fc8bb8d068d9874c6d7ad6

SHA256
bb6b4149610929628f09587536d131237a6155bb71fd814a37aae4c1a588fe33

SHA512
3255923d93b679fb5aca8d0d61b73d74410be723b0478847a432e587e5a38b87eac5c3640f8a9fcf264dea95f60d989358bf34ec6247704243f8bc9fae24a4fb

Download Submit
memory/2828-132-0x00000000752A0000-0x0000000075851000-memory.dmp

Filesize
5.7MB

Download
memory/2828-133-0x00000000752A0000-0x0000000075851000-memory.dmp

Filesize
5.7MB

Download
memory/2828-137-0x00000000752A0000-0x0000000075851000-memory.dmp

Filesize
5.7MB

Download
memory/3108-139-0x0000000000000000-mapping.dmp

Download
memory/4664-134-0x0000000000000000-mapping.dmp

Download
memory/4664-138-0x00000000752A0000-0x0000000075851000-memory.dmp

Filesize
5.7MB

Download
memory/4664-140-0x00000000752A0000-0x0000000075851000-memory.dmp

Filesize
5.7MB

Download

Analysis

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