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Analysis

  • max time kernel
    1800s
  • max time network
    1844s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    26-05-2021 11:51

General

  • Target

    keygen-step-4d.exe

Score
10/10

Malware Config

Signatures

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 14 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 3 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.

  • Program crash 1 IoCs
  • Modifies registry class 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Windows\system32\services.exe
    C:\Windows\system32\services.exe
    1⤵
      PID:468
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs
        2⤵
        • Suspicious use of NtCreateUserProcessOtherParentProcess
        • Drops file in System32 directory
        • Suspicious use of SetThreadContext
        • Drops file in Windows directory
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:876
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k SystemNetworkService
        2⤵
        • Modifies registry class
        PID:1752
    • C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe
      "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
      1⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1260
      • 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:360
        • 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:368
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:748
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 748 -s 476
          3⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:2016

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    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

    • \Program Files\install.dll

      MD5

      fe60ddbeab6e50c4f490ddf56b52057c

      SHA1

      6a71fdf73761a1192fd9c6961f66754a63d6db17

      SHA256

      9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

      SHA512

      0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

    • \Program Files\install.dll

      MD5

      fe60ddbeab6e50c4f490ddf56b52057c

      SHA1

      6a71fdf73761a1192fd9c6961f66754a63d6db17

      SHA256

      9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

      SHA512

      0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

    • \Program Files\install.dll

      MD5

      fe60ddbeab6e50c4f490ddf56b52057c

      SHA1

      6a71fdf73761a1192fd9c6961f66754a63d6db17

      SHA256

      9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

      SHA512

      0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

    • \Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

      MD5

      3b1b318df4d314a35dce9e8fd89e5121

      SHA1

      55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

      SHA256

      4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

      SHA512

      f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

      MD5

      3b1b318df4d314a35dce9e8fd89e5121

      SHA1

      55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

      SHA256

      4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

      SHA512

      f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

      MD5

      3b1b318df4d314a35dce9e8fd89e5121

      SHA1

      55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

      SHA256

      4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

      SHA512

      f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

      MD5

      3b1b318df4d314a35dce9e8fd89e5121

      SHA1

      55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

      SHA256

      4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

      SHA512

      f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

      MD5

      3b1b318df4d314a35dce9e8fd89e5121

      SHA1

      55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

      SHA256

      4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

      SHA512

      f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

      MD5

      e72eb3a565d7b5b83c7ff6fad519c6c9

      SHA1

      1a2668a26b01828eec1415aa614743abb0a4fb70

      SHA256

      8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

      SHA512

      71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

    • \Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

      MD5

      e72eb3a565d7b5b83c7ff6fad519c6c9

      SHA1

      1a2668a26b01828eec1415aa614743abb0a4fb70

      SHA256

      8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

      SHA512

      71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

    • \Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

      MD5

      e72eb3a565d7b5b83c7ff6fad519c6c9

      SHA1

      1a2668a26b01828eec1415aa614743abb0a4fb70

      SHA256

      8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

      SHA512

      71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

    • \Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

      MD5

      e72eb3a565d7b5b83c7ff6fad519c6c9

      SHA1

      1a2668a26b01828eec1415aa614743abb0a4fb70

      SHA256

      8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

      SHA512

      71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

    • \Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

      MD5

      e72eb3a565d7b5b83c7ff6fad519c6c9

      SHA1

      1a2668a26b01828eec1415aa614743abb0a4fb70

      SHA256

      8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

      SHA512

      71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

    • memory/360-66-0x0000000000000000-mapping.dmp

    • memory/368-93-0x0000000001F70000-0x0000000002071000-memory.dmp

      Filesize

      1.0MB

    • memory/368-94-0x0000000000360000-0x00000000003BC000-memory.dmp

      Filesize

      368KB

    • memory/368-70-0x0000000000000000-mapping.dmp

    • memory/368-92-0x0000000010000000-0x0000000010002000-memory.dmp

      Filesize

      8KB

    • memory/748-80-0x0000000000BB0000-0x0000000000BB1000-memory.dmp

      Filesize

      4KB

    • memory/748-99-0x000000001B050000-0x000000001B052000-memory.dmp

      Filesize

      8KB

    • memory/748-90-0x00000000003C0000-0x00000000003DC000-memory.dmp

      Filesize

      112KB

    • memory/748-91-0x00000000003E0000-0x00000000003E1000-memory.dmp

      Filesize

      4KB

    • memory/748-88-0x00000000003B0000-0x00000000003B1000-memory.dmp

      Filesize

      4KB

    • memory/748-77-0x0000000000000000-mapping.dmp

    • memory/876-95-0x0000000000830000-0x000000000087B000-memory.dmp

      Filesize

      300KB

    • memory/876-96-0x0000000000F90000-0x0000000001000000-memory.dmp

      Filesize

      448KB

    • memory/1260-60-0x0000000075B31000-0x0000000075B33000-memory.dmp

      Filesize

      8KB

    • memory/1752-98-0x00000000004A0000-0x0000000000510000-memory.dmp

      Filesize

      448KB

    • memory/1752-89-0x00000000FF93246C-mapping.dmp

    • memory/2016-100-0x0000000000000000-mapping.dmp

    • memory/2016-101-0x000007FEFC391000-0x000007FEFC393000-memory.dmp

      Filesize

      8KB

    • memory/2016-102-0x00000000021F0000-0x00000000021F1000-memory.dmp

      Filesize

      4KB