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Analysis

  • max time kernel
    3s
  • max time network
    29s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    29-04-2021 15:53

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Browser
    1⤵
      PID:2868
    • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
      "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2280
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe"
        2⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3068
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
          3⤵
          • Loads dropped DLL
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3204
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
        2⤵
        • Executes dropped EXE
        PID:1308
    • \??\c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s BITS
      1⤵
      • Suspicious use of SetThreadContext
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4032
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k SystemNetworkService
        2⤵
          PID:3500

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files\install.dat
        MD5

        806c3221a013fec9530762750556c332

        SHA1

        36475bcfd0a18555d7c0413d007bbe80f7d321b5

        SHA256

        9bcecc5fb84d21db673c81a7ed1d10b28686b8261f79136f748ab7bbad7752f7

        SHA512

        56bbaafe7b0883f4e5dcff00ae69339a3b81ac8ba90b304aeab3e4e7e7523b568fd9b269241fc38a39f74894084f1f252a91c22b79cc0a16f9e135859a13145e

      • C:\Program Files\install.dll
        MD5

        fe60ddbeab6e50c4f490ddf56b52057c

        SHA1

        6a71fdf73761a1192fd9c6961f66754a63d6db17

        SHA256

        9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

        SHA512

        0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
        MD5

        3b1b318df4d314a35dce9e8fd89e5121

        SHA1

        55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

        SHA256

        4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

        SHA512

        f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
        MD5

        3b1b318df4d314a35dce9e8fd89e5121

        SHA1

        55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

        SHA256

        4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

        SHA512

        f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
        MD5

        e72eb3a565d7b5b83c7ff6fad519c6c9

        SHA1

        1a2668a26b01828eec1415aa614743abb0a4fb70

        SHA256

        8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

        SHA512

        71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
        MD5

        e72eb3a565d7b5b83c7ff6fad519c6c9

        SHA1

        1a2668a26b01828eec1415aa614743abb0a4fb70

        SHA256

        8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

        SHA512

        71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

      • \Program Files\install.dll
        MD5

        fe60ddbeab6e50c4f490ddf56b52057c

        SHA1

        6a71fdf73761a1192fd9c6961f66754a63d6db17

        SHA256

        9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

        SHA512

        0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

      • memory/1308-126-0x0000000000C20000-0x0000000000C21000-memory.dmp
        Filesize

        4KB

      • memory/1308-120-0x0000000000000000-mapping.dmp
      • memory/1308-130-0x0000000001060000-0x0000000001061000-memory.dmp
        Filesize

        4KB

      • memory/1308-133-0x0000000001350000-0x000000000136C000-memory.dmp
        Filesize

        112KB

      • memory/1308-139-0x0000000001070000-0x0000000001071000-memory.dmp
        Filesize

        4KB

      • memory/1380-158-0x000002DE02D70000-0x000002DE02DE0000-memory.dmp
        Filesize

        448KB

      • memory/3068-116-0x0000000000000000-mapping.dmp
      • memory/3204-119-0x0000000000000000-mapping.dmp
      • memory/3204-154-0x0000000000C22000-0x0000000000D23000-memory.dmp
        Filesize

        1.0MB

      • memory/3204-157-0x0000000000A00000-0x0000000000A5C000-memory.dmp
        Filesize

        368KB

      • memory/3500-131-0x00007FF60D254060-mapping.dmp
      • memory/4032-159-0x0000024BF6370000-0x0000024BF63BB000-memory.dmp
        Filesize

        300KB

      • memory/4032-160-0x0000024BF65F0000-0x0000024BF6660000-memory.dmp
        Filesize

        448KB