njrat | b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589

General

Target

b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe
Size

23KB
MD5

54aaf1fc91baedb708e3b7206bce1142
SHA1

b1b0f90031a8a23637053cf7c0629764a1d20113
SHA256

b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589
SHA512

f705ca7cd5ae5c68c1b54ed3897b0e2d4d0bc8ea8c5742d50a129f6c756c91498066f76c96d3cef632c3e8825b05f2ab4a303c4da36a7460d5df6077afe70f9a

Score

10^/10

njrat ytb evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

ytb

C2

170.78.228.248:1177

Mutex

df5733cef342467c069491e91efa63c5

Attributes

reg_key
df5733cef342467c069491e91efa63c5
splitter
|'|'|

Signatures

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

Processes:

crss.exe

pid process

1224 crss.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
1224	crss.exe

Drops startup file 2 IoCs

Processes:

crss.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\df5733cef342467c069491e91efa63c5.exe	crss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\df5733cef342467c069491e91efa63c5.exe	crss.exe

Loads dropped DLL 1 IoCs

Processes:

b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe

pid process

1684 b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe

pid	process
1684	b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

crss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\df5733cef342467c069491e91efa63c5 = "\"C:\\Users\\Admin\\crss.exe\" .."	crss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\df5733cef342467c069491e91efa63c5 = "\"C:\\Users\\Admin\\crss.exe\" .."	crss.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 17 IoCs

Processes:

crss.exe

description	pid	process
Token: SeDebugPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe
Token: 33	1224	crss.exe
Token: SeIncBasePriorityPrivilege	1224	crss.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.execrss.exe

description	pid	process	target process
PID 1684 wrote to memory of 1224	1684	b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe	crss.exe
PID 1684 wrote to memory of 1224	1684	b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe	crss.exe
PID 1684 wrote to memory of 1224	1684	b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe	crss.exe
PID 1684 wrote to memory of 1224	1684	b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe	crss.exe
PID 1224 wrote to memory of 2044	1224	crss.exe	netsh.exe
PID 1224 wrote to memory of 2044	1224	crss.exe	netsh.exe
PID 1224 wrote to memory of 2044	1224	crss.exe	netsh.exe
PID 1224 wrote to memory of 2044	1224	crss.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe
"C:\Users\Admin\AppData\Local\Temp\b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1684

C:\Users\Admin\crss.exe
"C:\Users\Admin\crss.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1224

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\crss.exe" "crss.exe" ENABLE
3⤵
PID:2044

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\crss.exe
Filesize
23KB

MD5
54aaf1fc91baedb708e3b7206bce1142

SHA1
b1b0f90031a8a23637053cf7c0629764a1d20113

SHA256
b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589

SHA512
f705ca7cd5ae5c68c1b54ed3897b0e2d4d0bc8ea8c5742d50a129f6c756c91498066f76c96d3cef632c3e8825b05f2ab4a303c4da36a7460d5df6077afe70f9a

Download Submit
C:\Users\Admin\crss.exe
Filesize
23KB

MD5
54aaf1fc91baedb708e3b7206bce1142

SHA1
b1b0f90031a8a23637053cf7c0629764a1d20113

SHA256
b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589

SHA512
f705ca7cd5ae5c68c1b54ed3897b0e2d4d0bc8ea8c5742d50a129f6c756c91498066f76c96d3cef632c3e8825b05f2ab4a303c4da36a7460d5df6077afe70f9a

Download Submit
\Users\Admin\crss.exe
Filesize
23KB

MD5
54aaf1fc91baedb708e3b7206bce1142

SHA1
b1b0f90031a8a23637053cf7c0629764a1d20113

SHA256
b4b2eacff6bc86a3dfb035f67050dc53574fb10dda364c7f5c3258f4f2dff589

SHA512
f705ca7cd5ae5c68c1b54ed3897b0e2d4d0bc8ea8c5742d50a129f6c756c91498066f76c96d3cef632c3e8825b05f2ab4a303c4da36a7460d5df6077afe70f9a

Download Submit
memory/1224-57-0x0000000000000000-mapping.dmp

Download
memory/1224-61-0x0000000074B40000-0x00000000750EB000-memory.dmp

Filesize
5.7MB

Download
memory/1684-54-0x0000000075761000-0x0000000075763000-memory.dmp

Filesize
8KB

Download
memory/1684-55-0x0000000074B40000-0x00000000750EB000-memory.dmp

Filesize
5.7MB

Download
memory/2044-62-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads