njrat | 0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5

General

Target

0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe
Size

23KB
MD5

c18abb88e4ee9b92b87fcd373b0fe1cf
SHA1

77277a63e68511719cd59f08f5ad4ad3022a710c
SHA256

0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5
SHA512

e53bb7691d2ab50bf37ec72c0fd28b3141181e0d1482505942d953e50b271348e95e9d3855e633bec9e7d9bd2da688eed358eadc988802703d050e300e12908e
SSDEEP

384:bluBPiZCMfdfSJrQbsLRGSIxYVL46pg/i8BD9BmRvR6JZlbw8hqIusZzZ8jo:kOmhtIiRpcnuU

Score

10^/10

njrat city star evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

CITY STAR

C2

milla.publicvm.com:1177

Mutex

6cdb08dd3b21764fd94337c600ffa567

Attributes

reg_key
6cdb08dd3b21764fd94337c600ffa567
splitter
|'|'|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Executes dropped EXE 1 IoCs

pid	Process
1736	microseft.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
536	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6cdb08dd3b21764fd94337c600ffa567.exe	microseft.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6cdb08dd3b21764fd94337c600ffa567.exe	microseft.exe

Loads dropped DLL 1 IoCs

pid	Process
1552	0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\6cdb08dd3b21764fd94337c600ffa567 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microseft.exe\" .."	microseft.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\6cdb08dd3b21764fd94337c600ffa567 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microseft.exe\" .."	microseft.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 19 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe
Token: 33	1736	microseft.exe
Token: SeIncBasePriorityPrivilege	1736	microseft.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 1736	1552	0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe	26
PID 1552 wrote to memory of 1736	1552	0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe	26
PID 1552 wrote to memory of 1736	1552	0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe	26
PID 1552 wrote to memory of 1736	1552	0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe	26
PID 1736 wrote to memory of 536	1736	microseft.exe	27
PID 1736 wrote to memory of 536	1736	microseft.exe	27
PID 1736 wrote to memory of 536	1736	microseft.exe	27
PID 1736 wrote to memory of 536	1736	microseft.exe	27

C:\Users\Admin\AppData\Local\Temp\0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe
"C:\Users\Admin\AppData\Local\Temp\0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1552
- C:\Users\Admin\AppData\Roaming\microseft.exe
  "C:\Users\Admin\AppData\Roaming\microseft.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1736
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\microseft.exe" "microseft.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:536

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\microseft.exe

Filesize
23KB

MD5
c18abb88e4ee9b92b87fcd373b0fe1cf

SHA1
77277a63e68511719cd59f08f5ad4ad3022a710c

SHA256
0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5

SHA512
e53bb7691d2ab50bf37ec72c0fd28b3141181e0d1482505942d953e50b271348e95e9d3855e633bec9e7d9bd2da688eed358eadc988802703d050e300e12908e

Download Submit
C:\Users\Admin\AppData\Roaming\microseft.exe

Filesize
23KB

MD5
c18abb88e4ee9b92b87fcd373b0fe1cf

SHA1
77277a63e68511719cd59f08f5ad4ad3022a710c

SHA256
0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5

SHA512
e53bb7691d2ab50bf37ec72c0fd28b3141181e0d1482505942d953e50b271348e95e9d3855e633bec9e7d9bd2da688eed358eadc988802703d050e300e12908e

Download Submit
\Users\Admin\AppData\Roaming\microseft.exe

Filesize
23KB

MD5
c18abb88e4ee9b92b87fcd373b0fe1cf

SHA1
77277a63e68511719cd59f08f5ad4ad3022a710c

SHA256
0264f793019aa3bcfb0eea21eb639a14f41005a6edb5ea619171953a257bb4c5

SHA512
e53bb7691d2ab50bf37ec72c0fd28b3141181e0d1482505942d953e50b271348e95e9d3855e633bec9e7d9bd2da688eed358eadc988802703d050e300e12908e

Download Submit
memory/1552-54-0x0000000075681000-0x0000000075683000-memory.dmp

Filesize
8KB

Download
memory/1552-55-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download
memory/1552-61-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download
memory/1736-62-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download
memory/1736-65-0x0000000074530000-0x0000000074ADB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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