Overview

overview

10

Static

static

10

3c3a76b613...99.exe

windows7_x64

10

3c3a76b613...99.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 21:56

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General

  • Target

    3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99.exe

  • Size

    37KB

  • MD5

    da41705c070ddbe50b4774857de19a74

  • SHA1

    8871c7ce68dde674da05339f3a6d6d0eefb0bcb0

  • SHA256

    3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99

  • SHA512

    c1de464d1f2a3fb5bc95fb615f8909e8889383112691f10263d1bdf1aee94228c527d09caa195f6f40fe92e76cff0fb7eb679420390269e412f72143b0a30e9b

Score
10/10
njratevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

C2

79.140.166.40:22222

Mutex

af7a25d12a577183bc6b99084bac0e73

Attributes
  • reg_key

    af7a25d12a577183bc6b99084bac0e73

  • 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
  • Loads dropped DLL 1 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 22 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99.exe
    "C:\Users\Admin\AppData\Local\Temp\3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1520
    • C:\Users\Admin\AppData\Roaming\Microsoft.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft.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:1728
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Microsoft.exe" "Microsoft.exe" ENABLE
        3⤵
          PID:1232
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /IM Exsample.exe
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1724

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      37KB

      MD5

      da41705c070ddbe50b4774857de19a74

      SHA1

      8871c7ce68dde674da05339f3a6d6d0eefb0bcb0

      SHA256

      3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99

      SHA512

      c1de464d1f2a3fb5bc95fb615f8909e8889383112691f10263d1bdf1aee94228c527d09caa195f6f40fe92e76cff0fb7eb679420390269e412f72143b0a30e9b

      Download Submit

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

      37KB

      MD5

      da41705c070ddbe50b4774857de19a74

      SHA1

      8871c7ce68dde674da05339f3a6d6d0eefb0bcb0

      SHA256

      3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99

      SHA512

      c1de464d1f2a3fb5bc95fb615f8909e8889383112691f10263d1bdf1aee94228c527d09caa195f6f40fe92e76cff0fb7eb679420390269e412f72143b0a30e9b

      Download Submit

    • \Users\Admin\AppData\Roaming\Microsoft.exe
      Filesize

      37KB

      MD5

      da41705c070ddbe50b4774857de19a74

      SHA1

      8871c7ce68dde674da05339f3a6d6d0eefb0bcb0

      SHA256

      3c3a76b613083c05bb7db61c6b359870c2e90352076f2d32a9c96061494bab99

      SHA512

      c1de464d1f2a3fb5bc95fb615f8909e8889383112691f10263d1bdf1aee94228c527d09caa195f6f40fe92e76cff0fb7eb679420390269e412f72143b0a30e9b

      Download Submit

    • memory/1232-62-0x0000000000000000-mapping.dmp

      Download

    • memory/1520-54-0x0000000076451000-0x0000000076453000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1520-55-0x0000000074910000-0x0000000074EBB000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/1724-63-0x0000000000000000-mapping.dmp

      Download

    • memory/1728-57-0x0000000000000000-mapping.dmp

      Download

    • memory/1728-61-0x0000000074910000-0x0000000074EBB000-memory.dmp

      Filesize

      5.7MB

      Download