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Analysis

  • max time kernel
    177s
  • max time network
    175s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/10/2023, 21:00

General

  • Target

    d91b999125c1bb8daefbe8ed0542219c621b6ad2bc05e82f97e307ac9fb7f762.exe

  • Size

    536KB

  • MD5

    46fd8fc7865ac89b6bfe276b104d87d6

  • SHA1

    af73c435c1927659c6856e3c5fcf4a74ccd92a07

  • SHA256

    d91b999125c1bb8daefbe8ed0542219c621b6ad2bc05e82f97e307ac9fb7f762

  • SHA512

    d28cf792001190166e7687fcdc3455941b6883f73da61524ee826107edd2531ef086a8021e47a4273170b49bedefd00b68af698da847bcc62d5fbbf5b2ffb121

  • SSDEEP

    12288:8hf0Bs9bDDq9huzJgIJzgXaEw9Stu/aB9a/Okx2LIa:8dQyDLzJTveuK0/Okx2LF

Score
10/10
upx

Malware Config

Signatures

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Drops file in System32 directory 11 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:620
      • C:\ProgramData\Microsoft\tskill.exe
        "C:\ProgramData\Microsoft\tskill.exe"
        2⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Checks SCSI registry key(s)
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2684
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
      • Suspicious use of NtCreateUserProcessOtherParentProcess
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3172
      • C:\Users\Admin\AppData\Local\Temp\d91b999125c1bb8daefbe8ed0542219c621b6ad2bc05e82f97e307ac9fb7f762.exe
        "C:\Users\Admin\AppData\Local\Temp\d91b999125c1bb8daefbe8ed0542219c621b6ad2bc05e82f97e307ac9fb7f762.exe"
        2⤵
        • Checks computer location settings
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1760
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 1 & del /Q /F "C:\Users\Admin\AppData\Local\Temp\d91b999125c1bb8daefbe8ed0542219c621b6ad2bc05e82f97e307ac9fb7f762.exe"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2936
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 1
            4⤵
            • Delays execution with timeout.exe
            PID:3684

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Microsoft\tskill.exe

      Filesize

      24KB

      MD5

      2393d4f762fb671d92a59388109c24d4

      SHA1

      2e27346b7cff97619923c3e3199e68e7b91d142b

      SHA256

      8d9373ebd69f42153b0b47dbda2174811599db91630651ca01627ac1795f8d56

      SHA512

      9eaa9cd2813f8864244547fbc81ba6759f63e32f73ed2394dfa311ff60a9727e47dbdcf42d1aafb5e6c5a40a43a83ae32f5fa443083319f5b6b1e73457c59758

    • C:\ProgramData\Microsoft\tskill.exe

      Filesize

      24KB

      MD5

      2393d4f762fb671d92a59388109c24d4

      SHA1

      2e27346b7cff97619923c3e3199e68e7b91d142b

      SHA256

      8d9373ebd69f42153b0b47dbda2174811599db91630651ca01627ac1795f8d56

      SHA512

      9eaa9cd2813f8864244547fbc81ba6759f63e32f73ed2394dfa311ff60a9727e47dbdcf42d1aafb5e6c5a40a43a83ae32f5fa443083319f5b6b1e73457c59758

    • C:\Users\Admin\AppData\Local\Temp\834f73d3.tmp

      Filesize

      11.6MB

      MD5

      5244c87dbafa1f764b258766005dea73

      SHA1

      84cb8b4fb3e0910cfecfb31b6fa54c16d940e703

      SHA256

      077035f93ddc3ac5a8b5631d43826baf7722256eb1c4716b3c2567f07379bc40

      SHA512

      54d64d32e73e2752cdf9a110db17ad64574eb072df0ed0dc34a7e4bc469c03aa79ef7d45465e279ef85d5fc6b33a1b750b181476cdea7ea98898ddba9aa60438

    • C:\Users\Admin\AppData\Local\Temp\8359506e.tmp

      Filesize

      14.8MB

      MD5

      b1057fccc9bf7a0976c173bed8c7e2a0

      SHA1

      fa7023b9e81f80adf10721ae995ec07ba0edd2f2

      SHA256

      3ee17398c1784dac54e2a218aacf3e64819dab2e809040ffc261d0444e768582

      SHA512

      04d4e64b137163ff9ffa8692495a2f91d80340ee6470c987e4413be3774ca5b344db8ea69d110642e10017e7868a086086f297441f3bc91038dee942d2b84a12

    • memory/620-27-0x00000172C94E0000-0x00000172C9508000-memory.dmp

      Filesize

      160KB

    • memory/620-74-0x00000172C9620000-0x00000172C9621000-memory.dmp

      Filesize

      4KB

    • memory/1760-0-0x0000000000310000-0x0000000000412000-memory.dmp

      Filesize

      1.0MB

    • memory/1760-34-0x0000000000310000-0x0000000000412000-memory.dmp

      Filesize

      1.0MB

    • memory/1760-26-0x0000000000310000-0x0000000000412000-memory.dmp

      Filesize

      1.0MB

    • memory/2684-22-0x00007FF9037C0000-0x00007FF9037D0000-memory.dmp

      Filesize

      64KB

    • memory/2684-108-0x000002A342050000-0x000002A342051000-memory.dmp

      Filesize

      4KB

    • memory/2684-18-0x000002A340130000-0x000002A3401FB000-memory.dmp

      Filesize

      812KB

    • memory/2684-21-0x000002A33FF50000-0x000002A33FF51000-memory.dmp

      Filesize

      4KB

    • memory/2684-20-0x000002A340130000-0x000002A3401FB000-memory.dmp

      Filesize

      812KB

    • memory/2684-109-0x000002A342920000-0x000002A342921000-memory.dmp

      Filesize

      4KB

    • memory/2684-111-0x000002A342920000-0x000002A342921000-memory.dmp

      Filesize

      4KB

    • memory/2684-113-0x000002A3429D0000-0x000002A342B95000-memory.dmp

      Filesize

      1.8MB

    • memory/2684-114-0x000002A342800000-0x000002A342802000-memory.dmp

      Filesize

      8KB

    • memory/2684-110-0x000002A342060000-0x000002A342061000-memory.dmp

      Filesize

      4KB

    • memory/2684-60-0x00007FF9037C0000-0x00007FF9037D0000-memory.dmp

      Filesize

      64KB

    • memory/2684-17-0x000002A33FE90000-0x000002A33FE93000-memory.dmp

      Filesize

      12KB

    • memory/2684-62-0x000002A342030000-0x000002A342032000-memory.dmp

      Filesize

      8KB

    • memory/2684-107-0x000002A342800000-0x000002A342802000-memory.dmp

      Filesize

      8KB

    • memory/2684-106-0x000002A3429D0000-0x000002A342B95000-memory.dmp

      Filesize

      1.8MB

    • memory/2684-105-0x000002A342040000-0x000002A342041000-memory.dmp

      Filesize

      4KB

    • memory/2684-104-0x000002A342050000-0x000002A342051000-memory.dmp

      Filesize

      4KB

    • memory/2684-103-0x000002A342060000-0x000002A342061000-memory.dmp

      Filesize

      4KB

    • memory/2684-68-0x000002A340130000-0x000002A3401FB000-memory.dmp

      Filesize

      812KB

    • memory/2684-102-0x000002A342040000-0x000002A342041000-memory.dmp

      Filesize

      4KB

    • memory/2684-70-0x000002A33FF50000-0x000002A33FF51000-memory.dmp

      Filesize

      4KB

    • memory/2684-162-0x000002A3429D0000-0x000002A342B95000-memory.dmp

      Filesize

      1.8MB

    • memory/3172-97-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-6-0x0000000003320000-0x0000000003323000-memory.dmp

      Filesize

      12KB

    • memory/3172-76-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-77-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-78-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-79-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-80-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-82-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-81-0x0000000008CB0000-0x0000000008CC0000-memory.dmp

      Filesize

      64KB

    • memory/3172-86-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-84-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-88-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-90-0x0000000008CA0000-0x0000000008CB0000-memory.dmp

      Filesize

      64KB

    • memory/3172-91-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-89-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-92-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-94-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-93-0x0000000008CB0000-0x0000000008CC0000-memory.dmp

      Filesize

      64KB

    • memory/3172-96-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-95-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-98-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-72-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-100-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-101-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-69-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-66-0x0000000008CA0000-0x0000000008CB0000-memory.dmp

      Filesize

      64KB

    • memory/3172-67-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-65-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-64-0x0000000009850000-0x0000000009949000-memory.dmp

      Filesize

      996KB

    • memory/3172-63-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-61-0x0000000008CA0000-0x0000000008CA1000-memory.dmp

      Filesize

      4KB

    • memory/3172-35-0x0000000003650000-0x00000000036C9000-memory.dmp

      Filesize

      484KB

    • memory/3172-12-0x0000000009850000-0x0000000009949000-memory.dmp

      Filesize

      996KB

    • memory/3172-11-0x0000000008CA0000-0x0000000008CA1000-memory.dmp

      Filesize

      4KB

    • memory/3172-9-0x0000000008C80000-0x0000000008C83000-memory.dmp

      Filesize

      12KB

    • memory/3172-7-0x0000000003650000-0x00000000036C9000-memory.dmp

      Filesize

      484KB

    • memory/3172-4-0x0000000003320000-0x0000000003323000-memory.dmp

      Filesize

      12KB

    • memory/3172-73-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-122-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-123-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-124-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-126-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-127-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-125-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-128-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-130-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-132-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-133-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-134-0x0000000008330000-0x0000000008340000-memory.dmp

      Filesize

      64KB

    • memory/3172-135-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-136-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-140-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-142-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-141-0x00000000031D0000-0x00000000031E0000-memory.dmp

      Filesize

      64KB

    • memory/3172-139-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-138-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-137-0x0000000008330000-0x0000000008340000-memory.dmp

      Filesize

      64KB

    • memory/3172-146-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-144-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-147-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-148-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-150-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-152-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-154-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-5-0x0000000003650000-0x00000000036C9000-memory.dmp

      Filesize

      484KB

    • memory/3172-3-0x0000000003320000-0x0000000003323000-memory.dmp

      Filesize

      12KB

    • memory/3172-168-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-171-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-173-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-175-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-182-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-185-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-187-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-196-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB

    • memory/3172-200-0x0000000008340000-0x0000000008350000-memory.dmp

      Filesize

      64KB