njrat | 823d633ed0dd6822e1efa314ff214bd9128dd745e787426e1e4d9d781c7a57aa

Analysis

max time kernel
150s
max time network
152s
platform
windows10_x64
resource
win10-20220414-en
submitted
21-05-2022 21:10

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General

Target

njSRC.exe
Size

72KB
MD5

97cb5e5d682b4dabae747fb83f2ab8fd
SHA1

865eccfc883ef3df747d8cfc93f0e2dd463ad4e3
SHA256

823d633ed0dd6822e1efa314ff214bd9128dd745e787426e1e4d9d781c7a57aa
SHA512

ebfcb0fae917c3e055988b6f21454561e17d4e2b5cbe7373a4480ee788117a33b7fdf76482bbef6e8342bdc2751b1459e9624b657dd69849c8d714b74deec9fc

Score

10^/10

njrat evasion persistence suricata trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata
Executes dropped EXE 1 IoCs

Processes:

chrome.exe

pid process

4640 chrome.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
4640	chrome.exe

Drops startup file 2 IoCs

Processes:

chrome.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\029beef927953d4fdcf3fbf356352119.exe	chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\029beef927953d4fdcf3fbf356352119.exe	chrome.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

chrome.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\029beef927953d4fdcf3fbf356352119 = "\"C:\\Users\\Admin\\AppData\\Roaming\\chrome.exe\" .."	chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1804997378-2045782378-3882459628-1000\Software\Microsoft\Windows\CurrentVersion\Run\029beef927953d4fdcf3fbf356352119 = "\"C:\\Users\\Admin\\AppData\\Roaming\\chrome.exe\" .."	chrome.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

Processes:

chrome.exe

description	pid	process
Token: SeDebugPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe
Token: 33	4640	chrome.exe
Token: SeIncBasePriorityPrivilege	4640	chrome.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

njSRC.exechrome.exe

description	pid	process	target process
PID 1000 wrote to memory of 4640	1000	njSRC.exe	chrome.exe
PID 1000 wrote to memory of 4640	1000	njSRC.exe	chrome.exe
PID 1000 wrote to memory of 4640	1000	njSRC.exe	chrome.exe
PID 4640 wrote to memory of 2896	4640	chrome.exe	netsh.exe
PID 4640 wrote to memory of 2896	4640	chrome.exe	netsh.exe
PID 4640 wrote to memory of 2896	4640	chrome.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\njSRC.exe
"C:\Users\Admin\AppData\Local\Temp\njSRC.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1000

C:\Users\Admin\AppData\Roaming\chrome.exe
"C:\Users\Admin\AppData\Roaming\chrome.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4640

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\chrome.exe" "chrome.exe" ENABLE
3⤵
PID:2896

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\chrome.exe
Filesize
72KB

MD5
97cb5e5d682b4dabae747fb83f2ab8fd

SHA1
865eccfc883ef3df747d8cfc93f0e2dd463ad4e3

SHA256
823d633ed0dd6822e1efa314ff214bd9128dd745e787426e1e4d9d781c7a57aa

SHA512
ebfcb0fae917c3e055988b6f21454561e17d4e2b5cbe7373a4480ee788117a33b7fdf76482bbef6e8342bdc2751b1459e9624b657dd69849c8d714b74deec9fc

Download Submit
C:\Users\Admin\AppData\Roaming\chrome.exe
Filesize
72KB

MD5
97cb5e5d682b4dabae747fb83f2ab8fd

SHA1
865eccfc883ef3df747d8cfc93f0e2dd463ad4e3

SHA256
823d633ed0dd6822e1efa314ff214bd9128dd745e787426e1e4d9d781c7a57aa

SHA512
ebfcb0fae917c3e055988b6f21454561e17d4e2b5cbe7373a4480ee788117a33b7fdf76482bbef6e8342bdc2751b1459e9624b657dd69849c8d714b74deec9fc

Download Submit
memory/1000-118-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-119-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-120-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-121-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-122-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-123-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-124-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-125-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-126-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-127-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-128-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-129-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-130-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-131-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-132-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-133-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-134-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-136-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-135-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-137-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-138-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-139-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-140-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-141-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-142-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-143-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-144-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-145-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-146-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-147-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-148-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-150-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-151-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-152-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-153-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-154-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-155-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-157-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-156-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-149-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-158-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-159-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-160-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-161-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-162-0x0000000073380000-0x0000000073930000-memory.dmp

Filesize
5.7MB

Download
memory/1000-163-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-164-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-165-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-166-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-167-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-168-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-169-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-170-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-171-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/2896-220-0x0000000000000000-mapping.dmp

Download
memory/4640-172-0x0000000000000000-mapping.dmp

Download
memory/4640-174-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-175-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-176-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-177-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-178-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-179-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-180-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-181-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-183-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-184-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-185-0x0000000077000000-0x000000007718E000-memory.dmp

Filesize
1.6MB

Download
memory/4640-219-0x0000000073380000-0x0000000073930000-memory.dmp

Filesize
5.7MB

Download