njrat | a8c5577f91289348ad9e7350e2a9d351f0c6629d93ebe35580a193f0a9ee76ec

General

Target

cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe
Size

631KB
MD5

cb1cd0093d25a4e8b25dfbbbca80ac7a
SHA1

1d0fe0367be370c2b63d3d3d785f2a49d6f093f1
SHA256

a8c5577f91289348ad9e7350e2a9d351f0c6629d93ebe35580a193f0a9ee76ec
SHA512

97caec63273ac128bf067aa013670c97e7dd7845971e9d3079ded3fd91b1acb0cea4868eb9414a652f908ac7cecedda008560539cc6c23a7788de4627c5b2293
SSDEEP

1536:4lK/D257wieHPzOEPn5oozoFK8oGKbsYBvaBBqhETKdNwiB7aTPF1njY31TrFows:md

Score

10^/10

njrat nyan cat discovery execution trojan

Malware Config

Extracted

Family

njrat

Version

0.7NC

Botnet

NYAN CAT

C2

winddns.zapto.org:7896

Mutex

4700601397474359

Attributes

reg_key
4700601397474359
splitter
@!#&^%$

Signatures

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

Checks computer location settings 2 TTPs 2 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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vvvvv.vbs	cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1620 set thread context of 1100	1620	powershell.exe	97

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1620	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aspnet_compiler.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings	cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1620	powershell.exe
1620	powershell.exe

Suspicious use of AdjustPrivilegeToken 32 IoCs

description	pid	Process
Token: SeDebugPrivilege	1620	powershell.exe
Token: SeDebugPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe
Token: 33	1100	aspnet_compiler.exe
Token: SeIncBasePriorityPrivilege	1100	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 2940	2856	cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe	94
PID 2856 wrote to memory of 2940	2856	cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe	94
PID 2940 wrote to memory of 1620	2940	WScript.exe	95
PID 2940 wrote to memory of 1620	2940	WScript.exe	95
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97
PID 1620 wrote to memory of 1100	1620	powershell.exe	97

C:\Users\Admin\AppData\Local\Temp\cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cb1cd0093d25a4e8b25dfbbbca80ac7a_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vvvvv.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:2940
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windo 1 -noexit -exec bypass -file "C:\Users\Public\nod.ps1"
    3⤵
    - Suspicious use of SetThreadContext
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1620
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe
      "{path}"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:1100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n4zpnl4z.r1j.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vvvvv.vbs

Filesize
254B

MD5
794cf8ffab325f98a444bb2bd99eb0ff

SHA1
4dff460ae5095fe449087f2eaa5be95933c451de

SHA256
67a8f48eb5e9e0b8bfc15d06b72f874a2301f2534dcc604b5c6972800462890f

SHA512
70ef4988a775f0a804d0b0585a202fca95a55b288d1176f46692dd95d5eb4e1d30759eb85d51616154e4ed633da8d3501ec627b5495d497695177a196c628c1a

Download Submit
C:\Users\Public\nod.ps1

Filesize
370KB

MD5
c725d494658503e3c32d0ad648892bf6

SHA1
26668fd672fa5665f044758277ebafe7d36edd94

SHA256
77d82275fcb1f24fa16dd162c24b1f1b0962c3ee1fc1b7c755352607f464a317

SHA512
496affae41654ce9d86d38db200d14527974d7b81ca21957e118ef887bada3b039f4ccd222cc31de4c1dd57f18a819dafc27a0d739c1bba174005cb02553cf59

Download Submit
memory/1100-26-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1620-22-0x000001FB38E70000-0x000001FB38EB4000-memory.dmp

Filesize
272KB

Download
memory/1620-12-0x000001FB38970000-0x000001FB38992000-memory.dmp

Filesize
136KB

Download
memory/1620-24-0x000001FB38AC0000-0x000001FB38AD4000-memory.dmp

Filesize
80KB

Download
memory/1620-25-0x000001FB38E20000-0x000001FB38E26000-memory.dmp

Filesize
24KB

Download
memory/2856-11-0x00007FFFAC8D0000-0x00007FFFAD271000-memory.dmp

Filesize
9.6MB

Download
memory/2856-4-0x00007FFFAC8D0000-0x00007FFFAD271000-memory.dmp

Filesize
9.6MB

Download
memory/2856-3-0x00007FFFACB85000-0x00007FFFACB86000-memory.dmp

Filesize
4KB

Download
memory/2856-0-0x00007FFFACB85000-0x00007FFFACB86000-memory.dmp

Filesize
4KB

Download
memory/2856-2-0x00007FFFAC8D0000-0x00007FFFAD271000-memory.dmp

Filesize
9.6MB

Download
memory/2856-1-0x00007FFFAC8D0000-0x00007FFFAD271000-memory.dmp

Filesize
9.6MB

Download

Analysis

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