njrat | 5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46

General

Target

5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe
Size

29KB
MD5

a35802f39a336bee8b7fcf9fe772e730
SHA1

f55f71d67b97ec64e53933fc6cc5eb7e66530cd8
SHA256

5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46
SHA512

70d98b4672471eb6bd0be01cbb58fab178ccd9c85b43da6dd972b27ca289b71b47111cf4e79bf21283df060baaa5ea918f8371b31da4482f8a7bcf1f6c3d970c
SSDEEP

384:JYs5l7VL9skVQ42BkSv5dAsCGmqDm+jeI7GBsbh0w4wlAokw9OhgOL1vYRGOZzjq:57/skCXkQossqtje3BKh0p29SgR1w

Score

10^/10

njrat hacked evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

HacKed

C2

aziza12.no-ip.biz:1177

Mutex

f26884cbd1211af8a3cd7b57fffc2aad

Attributes

reg_key
f26884cbd1211af8a3cd7b57fffc2aad
splitter
|'|'|

Signatures

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

Processes:

croom.exe

pid process

840 croom.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1112 netsh.exe
Loads dropped DLL 1 IoCs

Processes:

5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe

pid process

1544 5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe

pid	process
1112	netsh.exe

pid	process
1544	5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

croom.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\f26884cbd1211af8a3cd7b57fffc2aad = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\croom.exe\" .."	croom.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\f26884cbd1211af8a3cd7b57fffc2aad = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\croom.exe\" .."	croom.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

croom.exe

pid	process
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe
840	croom.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

croom.exe

description pid process

Token: SeDebugPrivilege 840 croom.exe

description	pid	process
Token: SeDebugPrivilege	840	croom.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.execroom.exe

description	pid	process	target process
PID 1544 wrote to memory of 840	1544	5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe	croom.exe
PID 1544 wrote to memory of 840	1544	5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe	croom.exe
PID 1544 wrote to memory of 840	1544	5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe	croom.exe
PID 1544 wrote to memory of 840	1544	5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe	croom.exe
PID 840 wrote to memory of 1112	840	croom.exe	netsh.exe
PID 840 wrote to memory of 1112	840	croom.exe	netsh.exe
PID 840 wrote to memory of 1112	840	croom.exe	netsh.exe
PID 840 wrote to memory of 1112	840	croom.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe
"C:\Users\Admin\AppData\Local\Temp\5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1544

C:\Users\Admin\AppData\Local\Temp\croom.exe
"C:\Users\Admin\AppData\Local\Temp\croom.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:840

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\croom.exe" "croom.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:1112

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\croom.exe
Filesize
29KB

MD5
a35802f39a336bee8b7fcf9fe772e730

SHA1
f55f71d67b97ec64e53933fc6cc5eb7e66530cd8

SHA256
5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46

SHA512
70d98b4672471eb6bd0be01cbb58fab178ccd9c85b43da6dd972b27ca289b71b47111cf4e79bf21283df060baaa5ea918f8371b31da4482f8a7bcf1f6c3d970c

Download Submit
C:\Users\Admin\AppData\Local\Temp\croom.exe
Filesize
29KB

MD5
a35802f39a336bee8b7fcf9fe772e730

SHA1
f55f71d67b97ec64e53933fc6cc5eb7e66530cd8

SHA256
5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46

SHA512
70d98b4672471eb6bd0be01cbb58fab178ccd9c85b43da6dd972b27ca289b71b47111cf4e79bf21283df060baaa5ea918f8371b31da4482f8a7bcf1f6c3d970c

Download Submit
\Users\Admin\AppData\Local\Temp\croom.exe
Filesize
29KB

MD5
a35802f39a336bee8b7fcf9fe772e730

SHA1
f55f71d67b97ec64e53933fc6cc5eb7e66530cd8

SHA256
5a6b12f712058e79d5ad9b2df8c1329a2507f400f83cd4617b9a29ed4e5fea46

SHA512
70d98b4672471eb6bd0be01cbb58fab178ccd9c85b43da6dd972b27ca289b71b47111cf4e79bf21283df060baaa5ea918f8371b31da4482f8a7bcf1f6c3d970c

Download Submit
memory/840-57-0x0000000000000000-mapping.dmp

Download
memory/840-64-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download
memory/840-65-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download
memory/1112-62-0x0000000000000000-mapping.dmp

Download
memory/1544-54-0x0000000075681000-0x0000000075683000-memory.dmp

Filesize
8KB

Download
memory/1544-55-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download
memory/1544-61-0x0000000074530000-0x0000000074ADB000-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