Overview

overview

10

Static

static

10

2cf3ef9b4b...fd.exe

windows7-x64

10

2cf3ef9b4b...fd.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    151s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-07-2022 05:56

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General

  • Target

    2cf3ef9b4b6aff5b4fa53dd9a61e77fd.exe

  • Size

    37KB

  • MD5

    2cf3ef9b4b6aff5b4fa53dd9a61e77fd

  • SHA1

    b19d77793f0410c6b8fb044e573ebbfa4e9ba6f1

  • SHA256

    faa2e37de4a92178dfcc4d7966f1482f32755963736a964568e6d855f054eefb

  • SHA512

    5a3233ca3e8dc3a886addd8acda04ca0337e1a43760a617dc690f1b3851ef684acf51132cd07e548e566dc9c170bdd5cad48182d2bc525b6f41e231f4e19ad02

Score
10/10
njrathackedevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed

C2

2.tcp.eu.ngrok.io:16632

Mutex

f635a65108320f6738abf7ac7c96edbf

Attributes
  • reg_key

    f635a65108320f6738abf7ac7c96edbf

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2cf3ef9b4b6aff5b4fa53dd9a61e77fd.exe
    "C:\Users\Admin\AppData\Local\Temp\2cf3ef9b4b6aff5b4fa53dd9a61e77fd.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4424
    • C:\Users\Admin\AppData\Roaming\paint.exe
      "C:\Users\Admin\AppData\Roaming\paint.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1012
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\paint.exe" "paint.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:3752
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM Exsample.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3800

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

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\paint.exe
    Filesize

    37KB

    MD5

    2cf3ef9b4b6aff5b4fa53dd9a61e77fd

    SHA1

    b19d77793f0410c6b8fb044e573ebbfa4e9ba6f1

    SHA256

    faa2e37de4a92178dfcc4d7966f1482f32755963736a964568e6d855f054eefb

    SHA512

    5a3233ca3e8dc3a886addd8acda04ca0337e1a43760a617dc690f1b3851ef684acf51132cd07e548e566dc9c170bdd5cad48182d2bc525b6f41e231f4e19ad02

    Download Submit
  • C:\Users\Admin\AppData\Roaming\paint.exe
    Filesize

    37KB

    MD5

    2cf3ef9b4b6aff5b4fa53dd9a61e77fd

    SHA1

    b19d77793f0410c6b8fb044e573ebbfa4e9ba6f1

    SHA256

    faa2e37de4a92178dfcc4d7966f1482f32755963736a964568e6d855f054eefb

    SHA512

    5a3233ca3e8dc3a886addd8acda04ca0337e1a43760a617dc690f1b3851ef684acf51132cd07e548e566dc9c170bdd5cad48182d2bc525b6f41e231f4e19ad02

    Download Submit
  • memory/1012-131-0x0000000000000000-mapping.dmp
    Download
  • memory/1012-135-0x0000000074C50000-0x0000000075201000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/1012-138-0x0000000074C50000-0x0000000075201000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3752-136-0x0000000000000000-mapping.dmp
    Download
  • memory/3800-137-0x0000000000000000-mapping.dmp
    Download
  • memory/4424-130-0x0000000074C50000-0x0000000075201000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4424-134-0x0000000074C50000-0x0000000075201000-memory.dmp
    Filesize

    5.7MB

    Download