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Analysis

  • max time kernel
    152s
  • max time network
    181s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/10/2022, 23:16

General

  • Target

    0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe

  • Size

    32KB

  • MD5

    41a992c2e74797e76521dc86fba9d730

  • SHA1

    ffc0e7ca2b9ad263a325fd30e3e2bda867ec310b

  • SHA256

    0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a

  • SHA512

    8b2ea42d3ed6d14d67754c60d4784fdfad97c565e5d495dc3e68b26d762eca44e93c4e33a428494be7bc631ac4aeeff810ba16193ed6b24a327a540caba4fe04

  • SSDEEP

    768:r51WbPH59kgi2fKACIaFleZQWTGBxMLfb41CYR/9m:rHWbZltfjCHwQWT/81L

Malware Config

Extracted

Family

joker

C2

http://mmtie.oss-cn-hangzhou.aliyuncs.com

Signatures

  • joker

    Joker is an Android malware that targets billing and SMS fraud.

  • Downloads MZ/PE file
  • Executes dropped EXE 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.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

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

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

  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe
    "C:\Users\Admin\AppData\Local\Temp\0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:4732
    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe
      "C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe"
      2⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      PID:936
    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe
      "C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe"
      2⤵
      • Executes dropped EXE
      PID:1700
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe.bat
      2⤵
        PID:4496

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe

      Filesize

      16.8MB

      MD5

      1f1c87b2b8528523907cc58c00923df8

      SHA1

      ea0f7ad5e2d0bc48e52ea9e00c56dc14ea026514

      SHA256

      37e29c28eb4a4753f6926c2f7dfd169a09e184264f537c64893637716237733a

      SHA512

      2a8d2107eb8d479d8378c780389278e2d20653954d93dea72700b9bb9c21bc7ecf826243c1aadf8a6bc2705cc9d0055a01cf24c32a8ba38cca87ca51abd66fbc

    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe

      Filesize

      16.8MB

      MD5

      1f1c87b2b8528523907cc58c00923df8

      SHA1

      ea0f7ad5e2d0bc48e52ea9e00c56dc14ea026514

      SHA256

      37e29c28eb4a4753f6926c2f7dfd169a09e184264f537c64893637716237733a

      SHA512

      2a8d2107eb8d479d8378c780389278e2d20653954d93dea72700b9bb9c21bc7ecf826243c1aadf8a6bc2705cc9d0055a01cf24c32a8ba38cca87ca51abd66fbc

    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe

      Filesize

      4.6MB

      MD5

      512fe2eb54dde3c922ce73c075a592a1

      SHA1

      4332a256f0a77381ecd11e823475c335691325d7

      SHA256

      110f6a132f05a0d7b31d449beb75c7b22cd1fd409d50b32ded10e8ac305d852e

      SHA512

      a3f6fda13e054d5f3f52f0b62895c94b467b32e5811bf52e91c7c747554204af150c0bddce229bcd4b912c575079376ffdd02dbe281d2a59f1f6824b464b993e

    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe

      Filesize

      4.6MB

      MD5

      512fe2eb54dde3c922ce73c075a592a1

      SHA1

      4332a256f0a77381ecd11e823475c335691325d7

      SHA256

      110f6a132f05a0d7b31d449beb75c7b22cd1fd409d50b32ded10e8ac305d852e

      SHA512

      a3f6fda13e054d5f3f52f0b62895c94b467b32e5811bf52e91c7c747554204af150c0bddce229bcd4b912c575079376ffdd02dbe281d2a59f1f6824b464b993e

    • memory/936-138-0x0000000000400000-0x0000000000600000-memory.dmp

      Filesize

      2.0MB

    • memory/1700-144-0x0000000000400000-0x000000000051E000-memory.dmp

      Filesize

      1.1MB

    • memory/4732-132-0x0000000000400000-0x0000000000413000-memory.dmp

      Filesize

      76KB

    • memory/4732-134-0x0000000000400000-0x0000000000413000-memory.dmp

      Filesize

      76KB

    • memory/4732-133-0x0000000000400000-0x0000000000413000-memory.dmp

      Filesize

      76KB

    • memory/4732-143-0x0000000000400000-0x0000000000413000-memory.dmp

      Filesize

      76KB