Analysis

  • max time kernel
    174s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/11/2022, 20:23

General

  • Target

    7b6fea8906a1311e38bafb8e37f92ee5a149f63db64abcdbb4b1e590d3655922.exe

  • Size

    995KB

  • MD5

    f4d85e8ae9790fcdffc84f92923bda36

  • SHA1

    9e2f582ddf24aaa9ce972593d1ce301fd0f50222

  • SHA256

    7b6fea8906a1311e38bafb8e37f92ee5a149f63db64abcdbb4b1e590d3655922

  • SHA512

    7b3bd2487aed3585c401e058a24cf80b0f0b402e9f984afc19b875348e88351bc77c6bb68c17485953f65a044b7e10eba8455c18825dc8cfe6dd7a5798b3e966

  • SSDEEP

    24576:0G3nqqGvzQK3126Uuvo+x78kOg7uzIvKb8Cj:06k3cOvoUKb8Cj

Malware Config

Extracted

Family

xtremerat

C2

yocymusic.zapto.org

Signatures

  • Detect XtremeRAT payload 5 IoCs
  • XtremeRAT

    The XtremeRAT was developed by xtremecoder and has been available since at least 2010, and written in Delphi.

  • Executes dropped EXE 1 IoCs
  • Modifies Installed Components in the registry 2 TTPs 2 IoCs
  • UPX packed file 6 IoCs

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

  • 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 4 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7b6fea8906a1311e38bafb8e37f92ee5a149f63db64abcdbb4b1e590d3655922.exe
    "C:\Users\Admin\AppData\Local\Temp\7b6fea8906a1311e38bafb8e37f92ee5a149f63db64abcdbb4b1e590d3655922.exe"
    1⤵
    • Checks computer location settings
    • Drops desktop.ini file(s)
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:1504
    • C:\Users\Admin\AppData\Local\Temp\taskgen.exe
      "C:\Users\Admin\AppData\Local\Temp\taskgen.exe"
      2⤵
      • Executes dropped EXE
      • Modifies Installed Components in the registry
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:4756
      • C:\Windows\SysWOW64\svchost.exe
        svchost.exe
        3⤵
          PID:2952
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          3⤵
          • Suspicious use of SetWindowsHookEx
          PID:2472

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            21KB

            MD5

            ff53c2e05032c76a8457f2cde3ba1d3a

            SHA1

            15acfd27138b871a866f7aa5ffdfc6357d865cc1

            SHA256

            d2eaf2bda7a45563939d7ead777666263d1f9fcb94c5d3cf970aa90bad498c88

            SHA512

            c2bd5bb00fd3a1da735e1e598e2a7b1e7d1fe73e3911fa3cfa53f27d55d49df5ad947e37a7497eff252803c138b5d4c5471b48bf930a8b69e283ef222b2393fe

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

            Filesize

            21KB

            MD5

            ff53c2e05032c76a8457f2cde3ba1d3a

            SHA1

            15acfd27138b871a866f7aa5ffdfc6357d865cc1

            SHA256

            d2eaf2bda7a45563939d7ead777666263d1f9fcb94c5d3cf970aa90bad498c88

            SHA512

            c2bd5bb00fd3a1da735e1e598e2a7b1e7d1fe73e3911fa3cfa53f27d55d49df5ad947e37a7497eff252803c138b5d4c5471b48bf930a8b69e283ef222b2393fe

          • memory/1504-137-0x000000001F407000-0x000000001F40C000-memory.dmp

            Filesize

            20KB

          • memory/1504-146-0x000000001F407000-0x000000001F40C000-memory.dmp

            Filesize

            20KB

          • memory/1504-136-0x000000001F404000-0x000000001F407000-memory.dmp

            Filesize

            12KB

          • memory/1504-132-0x00007FFAEE0B0000-0x00007FFAEEAE6000-memory.dmp

            Filesize

            10.2MB

          • memory/1504-138-0x000000001F40C000-0x000000001F411000-memory.dmp

            Filesize

            20KB

          • memory/1504-139-0x000000001F400000-0x000000001F404000-memory.dmp

            Filesize

            16KB

          • memory/1504-134-0x00000000013C9000-0x00000000013CF000-memory.dmp

            Filesize

            24KB

          • memory/1504-135-0x000000001F400000-0x000000001F404000-memory.dmp

            Filesize

            16KB

          • memory/1504-133-0x00000000013C9000-0x00000000013CF000-memory.dmp

            Filesize

            24KB

          • memory/1504-147-0x000000001F40C000-0x000000001F411000-memory.dmp

            Filesize

            20KB

          • memory/1504-144-0x00000000013C9000-0x00000000013CF000-memory.dmp

            Filesize

            24KB

          • memory/1504-145-0x000000001F404000-0x000000001F407000-memory.dmp

            Filesize

            12KB

          • memory/2472-149-0x0000000000C80000-0x0000000000C96000-memory.dmp

            Filesize

            88KB

          • memory/2472-151-0x0000000000C80000-0x0000000000C96000-memory.dmp

            Filesize

            88KB

          • memory/4756-143-0x0000000000C80000-0x0000000000C96000-memory.dmp

            Filesize

            88KB

          • memory/4756-150-0x0000000000C80000-0x0000000000C96000-memory.dmp

            Filesize

            88KB