Analysis

  • max time kernel
    166s
  • max time network
    181s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    21-01-2022 23:00

General

  • Target

    BHC-PR/British High Commission Peter Emmerson.exe

  • Size

    1006KB

  • MD5

    c19114fc0d83113a32c5b22b8863dcc1

  • SHA1

    3d3e58b4009c10d3a842a45925132e7482cfcdac

  • SHA256

    c9cdd5a5b0701a4d311e0264f5bcec49fa500dde81ff8dbaa081be032b0c0446

  • SHA512

    c8973c8055ea42c2ca50dffa743bde646de55eda3bc1c4b669cff05ac0f9cef5edccb9c735e5a2e9d88d2f9fd0e2c0e7b4cf538405cea39463e6a4a0feffd997

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
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BHC-PR\British High Commission Peter Emmerson.exe
    "C:\Users\Admin\AppData\Local\Temp\BHC-PR\British High Commission Peter Emmerson.exe"
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1904
    • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\Admin\Documents\British High Commission Peter Emmerson-03-.pdf"
      2⤵
      • Checks processor information in registry
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1360
      • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
        "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
        3⤵
          PID:1676
        • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
          "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
          3⤵
            PID:900
          • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
            "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:3824
            • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
              "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=C5D6B3C42109B9EFC4C0FA66E09E07E5 --mojo-platform-channel-handle=1644 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
              4⤵
                PID:3012
              • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
                "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=renderer --disable-browser-side-navigation --disable-gpu-compositing --service-pipe-token=0F9C274A420A0FEEA265B08AB830B2FC --lang=en-US --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --enable-pinch --device-scale-factor=1 --num-raster-threads=1 --enable-gpu-async-worker-context --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;0,17,3553;0,18,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;1,17,3553;1,18,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;2,17,3553;2,18,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;3,17,3553;3,18,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553;4,17,3553;4,18,3553;5,0,3553;5,1,3553;5,2,3553;5,3,3553;5,4,3553;5,5,3553;5,6,3553;5,7,3553;5,8,3553;5,9,3553;5,10,3553;5,11,3553;5,12,3553;5,13,3553;5,14,3553;5,15,3553;5,16,3553;5,17,3553;5,18,3553;6,0,3553;6,1,3553;6,2,3553;6,3,3553;6,4,3553;6,5,3553;6,6,3553;6,7,3553;6,8,3553;6,9,3553;6,10,3553;6,11,3553;6,12,3553;6,13,3553;6,14,3553;6,15,3553;6,16,3553;6,17,3553;6,18,3553 --disable-accelerated-video-decode --service-request-channel-token=0F9C274A420A0FEEA265B08AB830B2FC --renderer-client-id=2 --mojo-platform-channel-handle=1672 --allow-no-sandbox-job /prefetch:1
                4⤵
                  PID:3436
              • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
                "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
                3⤵
                  PID:1984
              • C:\ProgramData\Hanthavra\rnthiavesa.exe
                "C:\ProgramData\Hanthavra\rnthiavesa.exe"
                2⤵
                • Executes dropped EXE
                PID:740

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\ProgramData\Hanthavra\rnthiavesa.exe

              MD5

              93e588df26c62a47d3564e58ec988368

              SHA1

              fcd11555531f636245d4c03f151dceb62ba72f6e

              SHA256

              6cecd33e717c607ce578942e35c020d7571a7db67ce9270f9dcff30018a666cc

              SHA512

              0f1f527eed767036dd6323fb5bfbf3e83fc7c2ef842c6d297742d536f8b1ae5b0b54a8ef83fe26f42916656feb0752badb6a39e63067a7dc6fe3e0797738a8ef

            • C:\ProgramData\Hanthavra\rnthiavesa.exe

              MD5

              93e588df26c62a47d3564e58ec988368

              SHA1

              fcd11555531f636245d4c03f151dceb62ba72f6e

              SHA256

              6cecd33e717c607ce578942e35c020d7571a7db67ce9270f9dcff30018a666cc

              SHA512

              0f1f527eed767036dd6323fb5bfbf3e83fc7c2ef842c6d297742d536f8b1ae5b0b54a8ef83fe26f42916656feb0752badb6a39e63067a7dc6fe3e0797738a8ef

            • C:\Users\Admin\Documents\British High Commission Peter Emmerson-03-.pdf

              MD5

              43a5a91e7e9f68bab5d7178f197e355d

              SHA1

              79a3c57cf80de41c8af841b70af3e7b8fcc8f0f6

              SHA256

              c108ab6d3dc6d82f0295a879e8761c9e9177c53a00601e08b155da47e3674349

              SHA512

              f922d339e91e4f66fdea5ab3205d5005536a4c37dbfadd27d98357da68e56ad84f9a14c1234efec8700bcf26fe78e6533e8edd8affb2c74da29ed6430ff732f4

            • memory/740-118-0x00000200AD680000-0x00000200AE02A000-memory.dmp

              Filesize

              9.7MB

            • memory/740-119-0x00000200C85D0000-0x00000200C85D2000-memory.dmp

              Filesize

              8KB

            • memory/1904-115-0x00000000028A0000-0x00000000028A2000-memory.dmp

              Filesize

              8KB

            • memory/3012-319-0x0000000077932000-0x0000000077933000-memory.dmp

              Filesize

              4KB

            • memory/3436-329-0x0000000077932000-0x0000000077933000-memory.dmp

              Filesize

              4KB