njrat | d29c210fb38115e7dbab2db78822979b2227a2cdf9809be230bb1af40125b2e3

General

Target

dcbb32405ee05f65b14eeeb946736623.exe
Size

37KB
MD5

dcbb32405ee05f65b14eeeb946736623
SHA1

cc73493e9d5cd12d9e1c96e22c5581a293bf83bf
SHA256

d29c210fb38115e7dbab2db78822979b2227a2cdf9809be230bb1af40125b2e3
SHA512

d1c4d752a2d3e486eb1a11090cc11e9f54b457c535d51514ef8fbcfbc914d421c6811b47741669e5cba5dff02fc3c4cd2e6209d91732e3087008a75bf4cf4dad
SSDEEP

384:b6bZpj6icjri5Z7JAyk/A4wfL3Ze6Yd2rAF+rMRTyN/0L+EcoinblneHQM3epzXq:ubXHJ7k/A4wzZrYYrM+rMRa8NuhOt

Score

10^/10

njrat welmoroff evasion trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

welmoroff

C2

0.tcp.eu.ngrok.io:11993

Mutex

619a2000a3e32d8aaaca3d14ba2e0945

Attributes

reg_key
619a2000a3e32d8aaaca3d14ba2e0945
splitter
|'|'|

Signatures

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

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
3732	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-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	dcbb32405ee05f65b14eeeb946736623.exe

Executes dropped EXE 1 IoCs

pid	Process
4320	Nursultan.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
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	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe
Token: 33	4320	Nursultan.exe
Token: SeIncBasePriorityPrivilege	4320	Nursultan.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3512 wrote to memory of 4320	3512	dcbb32405ee05f65b14eeeb946736623.exe	88
PID 3512 wrote to memory of 4320	3512	dcbb32405ee05f65b14eeeb946736623.exe	88
PID 3512 wrote to memory of 4320	3512	dcbb32405ee05f65b14eeeb946736623.exe	88
PID 4320 wrote to memory of 3732	4320	Nursultan.exe	92
PID 4320 wrote to memory of 3732	4320	Nursultan.exe	92
PID 4320 wrote to memory of 3732	4320	Nursultan.exe	92

C:\Users\Admin\AppData\Local\Temp\dcbb32405ee05f65b14eeeb946736623.exe
"C:\Users\Admin\AppData\Local\Temp\dcbb32405ee05f65b14eeeb946736623.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3512
- C:\Users\Admin\AppData\Roaming\Nursultan.exe
  "C:\Users\Admin\AppData\Roaming\Nursultan.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4320
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Nursultan.exe" "Nursultan.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:3732

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
37KB

MD5
dcbb32405ee05f65b14eeeb946736623

SHA1
cc73493e9d5cd12d9e1c96e22c5581a293bf83bf

SHA256
d29c210fb38115e7dbab2db78822979b2227a2cdf9809be230bb1af40125b2e3

SHA512
d1c4d752a2d3e486eb1a11090cc11e9f54b457c535d51514ef8fbcfbc914d421c6811b47741669e5cba5dff02fc3c4cd2e6209d91732e3087008a75bf4cf4dad

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

Filesize
37KB

MD5
dcbb32405ee05f65b14eeeb946736623

SHA1
cc73493e9d5cd12d9e1c96e22c5581a293bf83bf

SHA256
d29c210fb38115e7dbab2db78822979b2227a2cdf9809be230bb1af40125b2e3

SHA512
d1c4d752a2d3e486eb1a11090cc11e9f54b457c535d51514ef8fbcfbc914d421c6811b47741669e5cba5dff02fc3c4cd2e6209d91732e3087008a75bf4cf4dad

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

Filesize
37KB

MD5
dcbb32405ee05f65b14eeeb946736623

SHA1
cc73493e9d5cd12d9e1c96e22c5581a293bf83bf

SHA256
d29c210fb38115e7dbab2db78822979b2227a2cdf9809be230bb1af40125b2e3

SHA512
d1c4d752a2d3e486eb1a11090cc11e9f54b457c535d51514ef8fbcfbc914d421c6811b47741669e5cba5dff02fc3c4cd2e6209d91732e3087008a75bf4cf4dad

Download Submit
memory/3512-133-0x0000000000B10000-0x0000000000B20000-memory.dmp

Filesize
64KB

Download
memory/4320-143-0x00000000016A0000-0x00000000016B0000-memory.dmp

Filesize
64KB

Download
memory/4320-144-0x00000000016A0000-0x00000000016B0000-memory.dmp

Filesize
64KB

Download

Analysis

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