njrat | 33474be63039cfdd63aec01663d5390eb5080534905830238418fcd3c24ea1f9

General

Target
92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe
Size 23KB
Sample240603-2kfctsbf6t
SHA256 33474be63039cfdd63aec01663d5390eb5080534905830238418fcd3c24ea1f9
MD5 92d8c364561a545dfc4fb648f72cddaa
SHA1 ea72e78d48afdba8a8b9ca73e95107ef3933997d
SHA512 fb27e8aa8ac753a1a6ff4c333f440888d3d0b304b7a02301fe817a98a5b467d1428c52c479859056e3a68d90bd2d45f58fc2e6984f99e32096b32ab19414d3cc
SSDEEP 384:GYmCsw/yJrQ7tRGSQCY1r46JgfCcBjdhmRvR6JZlbw8hqIusZzZDV:p7GktQBRpcnuu
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

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

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
5364	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\04e031bc9b9f40f12845cc2f6c2e6b95.exe	csrsss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\04e031bc9b9f40f12845cc2f6c2e6b95.exe	csrsss.exe

Executes dropped EXE 1 IoCs

pid	Process
1876	csrsss.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\04e031bc9b9f40f12845cc2f6c2e6b95 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrsss.exe\" .."	csrsss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\04e031bc9b9f40f12845cc2f6c2e6b95 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrsss.exe\" .."	csrsss.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 35 IoCs

description	pid	Process
Token: SeDebugPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe
Token: 33	1876	csrsss.exe
Token: SeIncBasePriorityPrivilege	1876	csrsss.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4240 wrote to memory of 1876	4240	92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe	90
PID 4240 wrote to memory of 1876	4240	92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe	90
PID 4240 wrote to memory of 1876	4240	92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe	90
PID 1876 wrote to memory of 5364	1876	csrsss.exe	93
PID 1876 wrote to memory of 5364	1876	csrsss.exe	93
PID 1876 wrote to memory of 5364	1876	csrsss.exe	93

C:\Users\Admin\AppData\Local\Temp\92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\92d8c364561a545dfc4fb648f72cddaa_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4240
- C:\Users\Admin\AppData\Local\Temp\csrsss.exe
  "C:\Users\Admin\AppData\Local\Temp\csrsss.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1876
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\csrsss.exe" "csrsss.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:5364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

csrsss.exe

Path C:\Users\Admin\AppData\Local\Temp\csrsss.exe
Size 23KB
SHA256 33474be63039cfdd63aec01663d5390eb5080534905830238418fcd3c24ea1f9
MD5 92d8c364561a545dfc4fb648f72cddaa
SHA1 ea72e78d48afdba8a8b9ca73e95107ef3933997d
SHA512 fb27e8aa8ac753a1a6ff4c333f440888d3d0b304b7a02301fe817a98a5b467d1428c52c479859056e3a68d90bd2d45f58fc2e6984f99e32096b32ab19414d3cc
SSDEEP 384:GYmCsw/yJrQ7tRGSQCY1r46JgfCcBjdhmRvR6JZlbw8hqIusZzZDV:p7GktQBRpcnuu
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1876-13-0x00000000746C0000-0x0000000074C71000-memory.dmp

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memory/1876-14-0x00000000746C0000-0x0000000074C71000-memory.dmp

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memory/1876-15-0x00000000746C0000-0x0000000074C71000-memory.dmp

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memory/1876-17-0x00000000746C0000-0x0000000074C71000-memory.dmp

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memory/4240-0-0x00000000746C2000-0x00000000746C3000-memory.dmp

Download

memory/4240-1-0x00000000746C0000-0x0000000074C71000-memory.dmp

Download

memory/4240-2-0x00000000746C0000-0x0000000074C71000-memory.dmp

Download

memory/4240-12-0x00000000746C0000-0x0000000074C71000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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