Overview

overview

10

Static

static

10

gtarpcheat.exe

windows7_x64

10

gtarpcheat.exe

windows10_x64

10

Analysis

  • max time kernel
    61s
  • max time network
    59s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    21-12-2021 20:29

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General

  • Target

    gtarpcheat.exe

  • Size

    103KB

  • MD5

    c1baf97f7fb46569c697c3d719ad6cec

  • SHA1

    82396f8670a064715b8c1bf6d54b84e3ccc90331

  • SHA256

    9c722b7e216af094f3c8fc75011dac7b619ca0d83042ee7de350d08fccaf7feb

  • SHA512

    17bdc72566b604b4794b4935022930001a344ebf485a996aaeaa9928a327edfb87a5c009bb400fae5720c43e92742d173677cfb3b33a5ae729c626031794e1eb

Score
10/10
njratgta rpevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

GTA RP

C2

microsoftsecurityessentials.duckdns.org:1177

Mutex

2d2d20531cddc7f18203ecb28deee8a9

Attributes
  • reg_key

    2d2d20531cddc7f18203ecb28deee8a9

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • 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 12 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\gtarpcheat.exe
    "C:\Users\Admin\AppData\Local\Temp\gtarpcheat.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3684
    • C:\Users\Admin\AppData\Local\Temp\explorer.exe
      "C:\Users\Admin\AppData\Local\Temp\explorer.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:756
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\explorer.exe" "explorer.exe" ENABLE
        3⤵
          PID:3468
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /IM Exsample.exe
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:3496

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Replication Through Removable Media

    1
    T1091

    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

    Replication Through Removable Media

    1
    T1091

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\explorer.exe
      MD5

      c1baf97f7fb46569c697c3d719ad6cec

      SHA1

      82396f8670a064715b8c1bf6d54b84e3ccc90331

      SHA256

      9c722b7e216af094f3c8fc75011dac7b619ca0d83042ee7de350d08fccaf7feb

      SHA512

      17bdc72566b604b4794b4935022930001a344ebf485a996aaeaa9928a327edfb87a5c009bb400fae5720c43e92742d173677cfb3b33a5ae729c626031794e1eb

      Download Submit
    • C:\Users\Admin\AppData\Local\Temp\explorer.exe
      MD5

      c1baf97f7fb46569c697c3d719ad6cec

      SHA1

      82396f8670a064715b8c1bf6d54b84e3ccc90331

      SHA256

      9c722b7e216af094f3c8fc75011dac7b619ca0d83042ee7de350d08fccaf7feb

      SHA512

      17bdc72566b604b4794b4935022930001a344ebf485a996aaeaa9928a327edfb87a5c009bb400fae5720c43e92742d173677cfb3b33a5ae729c626031794e1eb

      Download Submit
    • memory/756-116-0x0000000000000000-mapping.dmp
      Download
    • memory/756-119-0x0000000002E60000-0x0000000002E61000-memory.dmp
      Filesize

      4KB

      Download
    • memory/3468-120-0x0000000000000000-mapping.dmp
      Download
    • memory/3496-121-0x0000000000000000-mapping.dmp
      Download
    • memory/3684-115-0x0000000002D70000-0x0000000002D71000-memory.dmp
      Filesize

      4KB

      Download