Analysis

  • max time kernel
    157s
  • max time network
    164s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    30-01-2022 15:06

General

  • Target

    sonam karwati.exe

  • Size

    459KB

  • MD5

    1f4afc5843bb6156627d0aa7feb18e1f

  • SHA1

    773121980b0c7b188156836b9ed341d673f8f4f6

  • SHA256

    92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179

  • SHA512

    d0173b8f0bcc076c0d9fb1ae7d0e634f89a2bda56168be66e02c91fe3c084bb142ee70dcdb18fad81ed81fa550da05fe52dda36c5578287ecb9e3d4a50c409ad

Score
10/10

Malware Config

Signatures

  • CrimsonRAT Main Payload 2 IoCs
  • CrimsonRat

    Crimson RAT is a malware linked to a Pakistani-linked threat actor.

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sonam karwati.exe
    "C:\Users\Admin\AppData\Local\Temp\sonam karwati.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1744
    • C:\ProgramData\Bhithoas\rwlbmarivs.exe
      "C:\ProgramData\Bhithoas\rwlbmarivs.exe"
      2⤵
      • Executes dropped EXE
      PID:1356
    • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\Documents\sonam karwati_02 .docx"
      2⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:968
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:1288

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\ProgramData\Bhithoas\rwlbmarivs.exe

      MD5

      6330ad6d358ef2985a0c630cc5e0b9f0

      SHA1

      6a13b5b42e6967e88a80584ab8e894b03c1baac7

      SHA256

      56331a4bc845b9ce0f2ad37f9c28d7c629e629d51349db0e5c5859b189c04ba1

      SHA512

      f85255da480164b3b60593c9ef9f274e5aa02146b2f26285c06639520de031be5f9572616d82e623a849c8cd7b6d74b399b237cad9bef7032d6928c4a945e72e

    • C:\ProgramData\Bhithoas\rwlbmarivs.exe

      MD5

      6330ad6d358ef2985a0c630cc5e0b9f0

      SHA1

      6a13b5b42e6967e88a80584ab8e894b03c1baac7

      SHA256

      56331a4bc845b9ce0f2ad37f9c28d7c629e629d51349db0e5c5859b189c04ba1

      SHA512

      f85255da480164b3b60593c9ef9f274e5aa02146b2f26285c06639520de031be5f9572616d82e623a849c8cd7b6d74b399b237cad9bef7032d6928c4a945e72e

    • C:\Users\Admin\Documents\sonam karwati_02 .docx

      MD5

      5bf97a6cb64ae6fd48d6c5d849be8983

      SHA1

      81c99a66a7f5ad086ef960764e429982cd2d1917

      SHA256

      3b70b7c809b5eb5e95d334391a4302c9fb75769e352e41dc7f99bf3ce538d621

      SHA512

      7af80ae255cf0f4fab22354981c94064f9f42ce82950d06b89e869399aafd3582d2663e56187418158304507fea6ca74f7c117d0ad977477c7e50b12cdac0673

    • memory/968-64-0x0000000070861000-0x0000000070863000-memory.dmp

      Filesize

      8KB

    • memory/968-63-0x0000000072DE1000-0x0000000072DE4000-memory.dmp

      Filesize

      12KB

    • memory/968-65-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/968-66-0x00000000763B1000-0x00000000763B3000-memory.dmp

      Filesize

      8KB

    • memory/1288-68-0x000007FEFC241000-0x000007FEFC243000-memory.dmp

      Filesize

      8KB

    • memory/1356-60-0x000007FEF2B90000-0x000007FEF3C26000-memory.dmp

      Filesize

      16.6MB

    • memory/1356-61-0x0000000000A40000-0x0000000000A42000-memory.dmp

      Filesize

      8KB

    • memory/1356-62-0x0000000000A46000-0x0000000000A65000-memory.dmp

      Filesize

      124KB

    • memory/1744-57-0x0000000000A46000-0x0000000000A65000-memory.dmp

      Filesize

      124KB

    • memory/1744-55-0x0000000000A40000-0x0000000000A42000-memory.dmp

      Filesize

      8KB

    • memory/1744-56-0x000007FEF2B90000-0x000007FEF3C26000-memory.dmp

      Filesize

      16.6MB