njrat | 111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d

General

Target

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe
Size

1.7MB
MD5

5de44904fb635506bc43de4fe10c1d38
SHA1

b7800af591a87fe99577786b98aa09107e0c4fc8
SHA256

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d
SHA512

a6462530b591c8222e7cfff9767a412f93ca5d39c56098a5f69724ca606eed70365b904b23939a8dac6aa8bbe398d1aec145d4054af2c4c24d1d757a1e82a73b

Score

10^/10

njrat zombie evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

Zombie

C2

pussy.n-e.kr:5552

Mutex

b62c95af1d1020e4f746a6e36fa2ec48

Attributes

reg_key
b62c95af1d1020e4f746a6e36fa2ec48
splitter
|'|'|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Wine	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\b62c95af1d1020e4f746a6e36fa2ec48 = "\"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\RegAsm.exe\" .."	RegAsm.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\b62c95af1d1020e4f746a6e36fa2ec48 = "\"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\RegAsm.exe\" .."	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

pid process

1292 111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

description	pid	process	target process
PID 1292 set thread context of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

pid	process
1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe
1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe

Suspicious use of AdjustPrivilegeToken 35 IoCs

Processes:

RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe
Token: 33	3480	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3480	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exeRegAsm.exe

description	pid	process	target process
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 1292 wrote to memory of 3480	1292	111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe	RegAsm.exe
PID 3480 wrote to memory of 2564	3480	RegAsm.exe	netsh.exe
PID 3480 wrote to memory of 2564	3480	RegAsm.exe	netsh.exe
PID 3480 wrote to memory of 2564	3480	RegAsm.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe
"C:\Users\Admin\AppData\Local\Temp\111eb3a585b4174c3f222f2ab08fae82dee466415a4f8253754478559963df3d.exe"
1⤵
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1292

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3480

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" "RegAsm.exe" ENABLE
3⤵
PID:2564

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

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

3

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1292-130-0x0000000077980000-0x0000000077B23000-memory.dmp

Filesize
1.6MB

Download
memory/1292-131-0x0000000000310000-0x0000000000772000-memory.dmp

Filesize
4.4MB

Download
memory/1292-132-0x0000000000310000-0x0000000000772000-memory.dmp

Filesize
4.4MB

Download
memory/1292-133-0x0000000000310000-0x0000000000772000-memory.dmp

Filesize
4.4MB

Download
memory/1292-134-0x0000000008110000-0x00000000086B4000-memory.dmp

Filesize
5.6MB

Download
memory/1292-135-0x0000000007AB0000-0x0000000007B42000-memory.dmp

Filesize
584KB

Download
memory/1292-136-0x0000000007A50000-0x0000000007A5A000-memory.dmp

Filesize
40KB

Download
memory/2564-140-0x0000000000000000-mapping.dmp

Download
memory/3480-137-0x0000000000000000-mapping.dmp

Download
memory/3480-138-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3480-139-0x0000000004F30000-0x0000000004FCC000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads