njrat | b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48

General

Target

b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe
Size

194KB
MD5

67ca864acaba6a7e02502538cc497760
SHA1

3cb2eaa09e9ae1ae64451fe7745d83118cfcdd6d
SHA256

b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48
SHA512

2b32bcf490129f4e7a92987f6775b45fbab74377ed57d7d89a38136026459063df0ed43ef38da72610ecff3733a88ce144f3713391ea1278114729241f847244
SSDEEP

1536:jfIshKRWuWIzbouo8I0JyT3zYX9j1oJYVyyT:jIs808ouoh0YTDy9j1o

Score

10^/10

njrat hacked evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

chromehost.ddns.net:200

Mutex

c96ffc7155e33bdb2e471b2aad6e0049

Attributes

reg_key
c96ffc7155e33bdb2e471b2aad6e0049
splitter
|'|'|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Executes dropped EXE 1 IoCs

Processes:

server.exe

pid process

664 server.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3412 netsh.exe

pid	process
664	server.exe

pid	process
3412	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

Processes:

b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe

Drops startup file 2 IoCs

Processes:

server.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\c96ffc7155e33bdb2e471b2aad6e0049.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\c96ffc7155e33bdb2e471b2aad6e0049.exe	server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

server.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\c96ffc7155e33bdb2e471b2aad6e0049 = "\"C:\\Users\\Admin\\AppData\\Roaming\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\c96ffc7155e33bdb2e471b2aad6e0049 = "\"C:\\Users\\Admin\\AppData\\Roaming\\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 31 IoCs

Processes:

server.exe

description	pid	process
Token: SeDebugPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe
Token: 33	664	server.exe
Token: SeIncBasePriorityPrivilege	664	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exeserver.exe

description	pid	process	target process
PID 4352 wrote to memory of 664	4352	b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe	server.exe
PID 4352 wrote to memory of 664	4352	b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe	server.exe
PID 4352 wrote to memory of 664	4352	b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe	server.exe
PID 664 wrote to memory of 3412	664	server.exe	netsh.exe
PID 664 wrote to memory of 3412	664	server.exe	netsh.exe
PID 664 wrote to memory of 3412	664	server.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe
"C:\Users\Admin\AppData\Local\Temp\b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352

C:\Users\Admin\AppData\Roaming\server.exe
"C:\Users\Admin\AppData\Roaming\server.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:664

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\server.exe" "server.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:3412

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\server.exe
Filesize
194KB

MD5
67ca864acaba6a7e02502538cc497760

SHA1
3cb2eaa09e9ae1ae64451fe7745d83118cfcdd6d

SHA256
b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48

SHA512
2b32bcf490129f4e7a92987f6775b45fbab74377ed57d7d89a38136026459063df0ed43ef38da72610ecff3733a88ce144f3713391ea1278114729241f847244

Download Submit
C:\Users\Admin\AppData\Roaming\server.exe
Filesize
194KB

MD5
67ca864acaba6a7e02502538cc497760

SHA1
3cb2eaa09e9ae1ae64451fe7745d83118cfcdd6d

SHA256
b1a3c81101a64476b401a8889c4a2280a5a4e591bb4e5d184074934fade23c48

SHA512
2b32bcf490129f4e7a92987f6775b45fbab74377ed57d7d89a38136026459063df0ed43ef38da72610ecff3733a88ce144f3713391ea1278114729241f847244

Download Submit
memory/664-134-0x0000000000000000-mapping.dmp

Download
memory/664-138-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/664-140-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/3412-139-0x0000000000000000-mapping.dmp

Download
memory/4352-132-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/4352-133-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/4352-137-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads