njrat | e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc

General

Target

e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe
Size

23KB
MD5

45c2097b3e02593577bc6bd4705aa590
SHA1

79cbaa62c0c129471435a8af5eefc7831c3a235b
SHA256

e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc
SHA512

a1cda5b41db6e8b7af7ec59942b25c00c42d57407ca35f83130f19ebea1b57e9ae8002966fdee171e37876cb1cd845c1f40268f7caddb0e430670efc09f44332
SSDEEP

384:KMKyOkBkRbohza8yuTUtZu06cgV4a5pzomRvR6JZlbw8hqIusZzZkt:l/YI1TDRpcnuv

Score

10^/10

njrat rbgrbg evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

rbgrbg

C2

rbg.no-ip.biz:4430

Mutex

9ad8e131ea8eb55212ed9bdba208c728

Attributes

reg_key
9ad8e131ea8eb55212ed9bdba208c728
splitter
|'|'|

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
808	svhost.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
3848	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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9ad8e131ea8eb55212ed9bdba208c728.exe	svhost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9ad8e131ea8eb55212ed9bdba208c728.exe	svhost.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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9ad8e131ea8eb55212ed9bdba208c728 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svhost.exe\" .."	svhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\9ad8e131ea8eb55212ed9bdba208c728 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svhost.exe\" .."	svhost.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 29 IoCs

description	pid	Process
Token: SeDebugPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe
Token: 33	808	svhost.exe
Token: SeIncBasePriorityPrivilege	808	svhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3948 wrote to memory of 808	3948	e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe	82
PID 3948 wrote to memory of 808	3948	e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe	82
PID 3948 wrote to memory of 808	3948	e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe	82
PID 808 wrote to memory of 3848	808	svhost.exe	88
PID 808 wrote to memory of 3848	808	svhost.exe	88
PID 808 wrote to memory of 3848	808	svhost.exe	88

C:\Users\Admin\AppData\Local\Temp\e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe
"C:\Users\Admin\AppData\Local\Temp\e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Users\Admin\AppData\Local\Temp\svhost.exe
  "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:808
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\svhost.exe" "svhost.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:3848

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\svhost.exe

Filesize
23KB

MD5
45c2097b3e02593577bc6bd4705aa590

SHA1
79cbaa62c0c129471435a8af5eefc7831c3a235b

SHA256
e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc

SHA512
a1cda5b41db6e8b7af7ec59942b25c00c42d57407ca35f83130f19ebea1b57e9ae8002966fdee171e37876cb1cd845c1f40268f7caddb0e430670efc09f44332

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

Filesize
23KB

MD5
45c2097b3e02593577bc6bd4705aa590

SHA1
79cbaa62c0c129471435a8af5eefc7831c3a235b

SHA256
e8c5ae21497796bbb296b0e01ab743739f15153a0059bb4709cf7eba2a3a31bc

SHA512
a1cda5b41db6e8b7af7ec59942b25c00c42d57407ca35f83130f19ebea1b57e9ae8002966fdee171e37876cb1cd845c1f40268f7caddb0e430670efc09f44332

Download Submit
memory/808-137-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/808-140-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/3948-132-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/3948-133-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/3948-138-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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