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Analysis

  • max time kernel
    155s
  • max time network
    179s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/10/2022, 13:50

General

  • Target

    fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe

  • Size

    27KB

  • MD5

    48ef14c9e3f77ede2d868c1fe28154b0

  • SHA1

    de131002f2034948de8cf1a714ff8c11417abf34

  • SHA256

    fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f

  • SHA512

    f9f40838845cb01a66c1504db479eb9114c798f678b5d0f5314bc1636eb2d5be04c6e3c0f4053ef099cfcd6287742ee0d11e4bbda92983a8a80b5adf36973762

  • SSDEEP

    768:r51hwke4u9Ybj+i+RTf9PuONOsC9yoYf:rVFe4rbjsZpuRv+

Malware Config

Extracted

Family

joker

C2

http://tttie.oss-cn-shenzhen.aliyuncs.com

Signatures

  • joker

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

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 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.

  • 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 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe
    "C:\Users\Admin\AppData\Local\Temp\fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:4092
    • 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
      PID:116

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • 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/4092-132-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4092-133-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB