Overview

overview

10

Static

static

10

053813c8b9...3c.exe

windows7_x64

10

053813c8b9...3c.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 23:19

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General

  • Target

    053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe

  • Size

    23KB

  • MD5

    a81fbdcd88ec62ad6a264e21e7634738

  • SHA1

    51dae7eb156317ee935dfb82050b135da0288e30

  • SHA256

    053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c

  • SHA512

    a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b

Score
10/10
njratfast.exeevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

Fast.exe

C2

127.0.0.1:3158

Mutex

59a4c7d5a45bd632bb2583e1dc4664dd

Attributes
  • reg_key

    59a4c7d5a45bd632bb2583e1dc4664dd

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

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

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

  • 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.

  • Suspicious use of AdjustPrivilegeToken 31 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe
    "C:\Users\Admin\AppData\Local\Temp\053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1496
    • C:\Users\Admin\AppData\Local\Temp\Fast.exe
      "C:\Users\Admin\AppData\Local\Temp\Fast.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3160
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Fast.exe" "Fast.exe" ENABLE
        3⤵
          PID:1284

    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\Local\Temp\Fast.exe
      Filesize

      23KB

      MD5

      a81fbdcd88ec62ad6a264e21e7634738

      SHA1

      51dae7eb156317ee935dfb82050b135da0288e30

      SHA256

      053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c

      SHA512

      a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b

      Download Submit
    • C:\Users\Admin\AppData\Local\Temp\Fast.exe
      Filesize

      23KB

      MD5

      a81fbdcd88ec62ad6a264e21e7634738

      SHA1

      51dae7eb156317ee935dfb82050b135da0288e30

      SHA256

      053813c8b9f738f9428d75fc1eda6a189f1926d2d77b219d4f0f98647219673c

      SHA512

      a54c6fb2a179b0571532b126c49b0ffeffbba07dda48fb7e19324a9424c1f5b0e2b121e9fd0145eb552d6b371480c21edf112c4d68924ad7d91afd23fa8ec51b

      Download Submit
    • memory/1284-135-0x0000000000000000-mapping.dmp
      Download
    • memory/1496-130-0x0000000074E80000-0x0000000075431000-memory.dmp
      Filesize

      5.7MB

      Download
    • memory/3160-131-0x0000000000000000-mapping.dmp
      Download
    • memory/3160-134-0x0000000074E80000-0x0000000075431000-memory.dmp
      Filesize

      5.7MB

      Download