Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 17:11

General

  • Target

    27ad3ad8da4f3ef37c637b58e1a537778bb2965630c773ce9ddcda972a19e8a3.exe

  • Size

    684KB

  • MD5

    41bbf329d25a4664ed18bb8f079980d0

  • SHA1

    be503850c64fca1bb91c8975084fb569e59be529

  • SHA256

    27ad3ad8da4f3ef37c637b58e1a537778bb2965630c773ce9ddcda972a19e8a3

  • SHA512

    8942136dcbf4d4176d07c99c60472252a8d6377bdcab32dfe36f6f15313b623bab57e1685296d900e55b2f447eda276100f46a528ee6767d4f76c24ee6db5c01

  • SSDEEP

    6144:+h3rzMYXh+02d1r5ZTYnQbc0w6LlANv4hituxp38u0:UrgQmd195KQ40wWlANv4h8u/8

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • UAC bypass 3 TTPs 12 IoCs
  • Adds policy Run key to start application 2 TTPs 26 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Looks up external IP address via web service 6 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\27ad3ad8da4f3ef37c637b58e1a537778bb2965630c773ce9ddcda972a19e8a3.exe
    "C:\Users\Admin\AppData\Local\Temp\27ad3ad8da4f3ef37c637b58e1a537778bb2965630c773ce9ddcda972a19e8a3.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4664
    • C:\Users\Admin\AppData\Local\Temp\taltegr.exe
      "C:\Users\Admin\AppData\Local\Temp\taltegr.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:4988
    • C:\Users\Admin\AppData\Local\Temp\taltegr.exe
      "C:\Users\Admin\AppData\Local\Temp\taltegr.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • System policy modification
      PID:4912

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\taltegr.exe

    Filesize

    1.2MB

    MD5

    ab6ecaac0444c9c6610edfeefeb59fe0

    SHA1

    508482528ab978438f5312b7a37c7ab6e7d72437

    SHA256

    05e1c6da9b7e4a33e586a1d88718fc95ea2b76d05826a2ed7a7dfc8cbc4bb8ac

    SHA512

    44bee51d4012d7da0b29f69ab2e4f2e5aed1d733e5fe17e56f4ef0e974227022b65b339389d15bfbe1641a9d8dc6d09d756cf2903220523d79d3e075af799ceb

  • C:\Users\Admin\AppData\Local\Temp\taltegr.exe

    Filesize

    1.2MB

    MD5

    ab6ecaac0444c9c6610edfeefeb59fe0

    SHA1

    508482528ab978438f5312b7a37c7ab6e7d72437

    SHA256

    05e1c6da9b7e4a33e586a1d88718fc95ea2b76d05826a2ed7a7dfc8cbc4bb8ac

    SHA512

    44bee51d4012d7da0b29f69ab2e4f2e5aed1d733e5fe17e56f4ef0e974227022b65b339389d15bfbe1641a9d8dc6d09d756cf2903220523d79d3e075af799ceb

  • C:\Users\Admin\AppData\Local\Temp\taltegr.exe

    Filesize

    1.2MB

    MD5

    ab6ecaac0444c9c6610edfeefeb59fe0

    SHA1

    508482528ab978438f5312b7a37c7ab6e7d72437

    SHA256

    05e1c6da9b7e4a33e586a1d88718fc95ea2b76d05826a2ed7a7dfc8cbc4bb8ac

    SHA512

    44bee51d4012d7da0b29f69ab2e4f2e5aed1d733e5fe17e56f4ef0e974227022b65b339389d15bfbe1641a9d8dc6d09d756cf2903220523d79d3e075af799ceb

  • memory/4912-135-0x0000000000000000-mapping.dmp

  • memory/4988-132-0x0000000000000000-mapping.dmp