Overview

overview

10

Static

static

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windows10_x64

1

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windows10_x64

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windows10_x64

10

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windows10_x64

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windows7_x64

1

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windows7_x64

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windows7_x64

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windows7_x64

10

win102

windows10_x64

1

win102

windows10_x64

10

win102

windows10_x64

8

win102

windows10_x64

10

win104

windows10_x64

1

win104

windows10_x64

10

win104

windows10_x64

10

win104

windows10_x64

win105

windows10_x64

1

win105

windows10_x64

10

win105

windows10_x64

10

win105

windows10_x64

win106

windows10_x64

1

win106

windows10_x64

win106

windows10_x64

10

win106

windows10_x64

10

win103

windows10_x64

1

win103

windows10_x64

win103

windows10_x64

8

win103

windows10_x64

8

win101

windows10_x64

1

win101

windows10_x64

10

win101

windows10_x64

10

win101

windows10_x64

Resubmissions

25-04-2021 09:42

210425-v9mttlcxke 10

25-04-2021 08:59

210425-1d89vxfyln 10

25-04-2021 07:37

210425-b8smdccdwe 10

25-04-2021 06:55

210425-1csfnkw57n 10

24-04-2021 20:32

210424-x7kp9rrf4x 10

Analysis

  • max time kernel
    19s
  • max time network
    69s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    24-04-2021 20:32

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General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 5 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 data under HKEY_USERS 5 IoCs
  • Modifies registry class 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Browser
    1⤵
      PID:2712
    • 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:736
      • 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:1016
        • 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:3140
      • 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
        PID:200
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:500
        • C:\Users\Admin\AppData\Local\Temp\is-VUPPV.tmp\Install.tmp
          "C:\Users\Admin\AppData\Local\Temp\is-VUPPV.tmp\Install.tmp" /SL5="$501A0,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:1832
          • C:\Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\Ultra.exe
            "C:\Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\Ultra.exe" /S /UID=burnerch1
            4⤵
            • Drops file in Drivers directory
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3316
            • C:\Program Files\Reference Assemblies\PLCULSOHKR\ultramediaburner.exe
              "C:\Program Files\Reference Assemblies\PLCULSOHKR\ultramediaburner.exe" /VERYSILENT
              5⤵
                PID:3744
      • \??\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:1340
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k SystemNetworkService
          2⤵
          • Checks processor information in registry
          • Modifies data under HKEY_USERS
          • Modifies registry class
          PID:744

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • memory/200-126-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

        Filesize

        4KB

        Download

      • memory/200-130-0x0000000001230000-0x0000000001231000-memory.dmp

        Filesize

        4KB

        Download

      • memory/200-128-0x0000000001000000-0x0000000001001000-memory.dmp

        Filesize

        4KB

        Download

      • memory/200-129-0x0000000001010000-0x000000000102C000-memory.dmp

        Filesize

        112KB

        Download

      • memory/200-144-0x000000001B8E0000-0x000000001B8E2000-memory.dmp

        Filesize

        8KB

        Download

      • memory/500-147-0x0000000000400000-0x000000000042B000-memory.dmp

        Filesize

        172KB

        Download

      • memory/744-137-0x0000016BBE400000-0x0000016BBE44B000-memory.dmp

        Filesize

        300KB

        Download

      • memory/744-140-0x0000016BBE700000-0x0000016BBE770000-memory.dmp

        Filesize

        448KB

        Download

      • memory/1340-132-0x000001FA4D110000-0x000001FA4D112000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1340-142-0x000001FA4D4B0000-0x000001FA4D520000-memory.dmp

        Filesize

        448KB

        Download

      • memory/1832-153-0x00000000001E0000-0x00000000001E1000-memory.dmp

        Filesize

        4KB

        Download

      • memory/3140-139-0x0000000000FA0000-0x0000000000FFC000-memory.dmp

        Filesize

        368KB

        Download

      • memory/3140-135-0x0000000000E50000-0x0000000000EFE000-memory.dmp

        Filesize

        696KB

        Download

      • memory/3316-157-0x00000000023C0000-0x00000000023C2000-memory.dmp

        Filesize

        8KB

        Download

      • memory/3744-160-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

        Download