General

  • Target

    Purchase_Order#29758-86548.pdf.001.rar

  • Size

    96KB

  • Sample

    250321-l1rg2awvhw

  • MD5

    2909d4daf9857fdc859b8c28590a106c

  • SHA1

    fdceb54f39949d2af780f8bc2786abd1ed702d4b

  • SHA256

    ba71397fd0c45b5eea93d3c53291dea0428046e1eda081fe4bbe10065b50f1af

  • SHA512

    18dd681a188f440f846a41aacd27b54ee9aa866f779daf94f90dbf46e23a7f55b26631647175e36ea44dbf1b8826c3d87e7c5eb836240659a49e065f77578088

  • SSDEEP

    3072:UXDPVcfGe9hxlfvEJ4BF7Xt6ImrkLbtnVN:ctcfHHxlnEsbtPFP

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

March-25

C2

chongmei33.publicvm.com:2703

chongmei33.publicvm.com:7031

umarmira055.duckdns.org:2703

umarmira055.duckdns.org:7031

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    WindowsUpdate.exe

  • install_folder

    %Temp%

aes.plain

Extracted

Family

wshrat

C2

http://chongmei33.myddns.rocks:7044

Targets

    • Target

      Purchase_Order#29758-86548.js

    • Size

      563KB

    • MD5

      ab0dac9d1b9b83383dbc5d469d5fa1ae

    • SHA1

      b15b24f82ef0a07fce5b7c2735d8a8b46b547287

    • SHA256

      398e3d3d2ad8e2e91693c1682780d2352ebe962b67547af5c20735ae97ea94a9

    • SHA512

      66829799b8233f142aa1420f1e2dd4dfbdc3f2417279b12481d87612a0d97add61d819e58c369818ac201a4ba568e92d5fcd4b9ce17fb68332eeb5718f2f72fc

    • SSDEEP

      3072:MCAFTI3Ws7WZ4hRPhts7YRw7Xx5FzNM6x/P0UHD2yQ/ry:MCAFs3F7WZIhe7nbDIxu

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Asyncrat family

    • WSHRAT

      WSHRAT is a variant of Houdini worm and has vbs and js variants.

    • Wshrat family

    • Async RAT payload

    • Blocklisted process makes network request

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

MITRE ATT&CK Enterprise v15

Tasks