Analysis

  • max time kernel
    40s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    26-08-2022 03:01

General

  • Target

    boos直聘-李笙-业务代表岗位-清华大学-工商管理专业.exe

  • Size

    511KB

  • MD5

    7b3c8a33a8607c3b1cabd24ba83a9876

  • SHA1

    70a9605990488445f8ae5836b5c92819f93d6355

  • SHA256

    2d1d71f05b0ab72e85c649e04f4c78f3007741649b9910be4266fde74504456d

  • SHA512

    3c71c27fa650c64a1b10220c5bdc42031a3426745f9a4bfbd128fd4dd7e31098c1049884e977a9b2f52f772229fc94ba44781525cade627ce562a6b663cc6c6c

  • SSDEEP

    6144:IeiRWoGu79mhdLRYxJbFP23zKx8t52aXbJdXv+4wNaS:F/oOhdLEwjKx8t52aLJd/3wNaS

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 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\boos直聘-李笙-业务代表岗位-清华大学-工商管理专业.exe
    "C:\Users\Admin\AppData\Local\Temp\boos直聘-李笙-业务代表岗位-清华大学-工商管理专业.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1416
    • C:\programdata\word.exe
      "C:\programdata\word.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of NtCreateThreadExHideFromDebugger
      PID:1556

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\word.exe
    Filesize

    273KB

    MD5

    773295382ac480e8db8fb2c1efad4cda

    SHA1

    ae7c78724b8e0c946dd12d2ebc61f0f11c911067

    SHA256

    3823a537e612fe6e0453394242999cabb6d5070d49da22950102490d59fc6681

    SHA512

    c0116b326fe1a4adf4b0abcccf1cf14aa0ad3f6762c61650002e524c57d0af296dfbb575eca317cbe8ac144e50fd8d198ef4a62bcb49e47cbd4da26813a3c288

  • \ProgramData\word.exe
    Filesize

    273KB

    MD5

    773295382ac480e8db8fb2c1efad4cda

    SHA1

    ae7c78724b8e0c946dd12d2ebc61f0f11c911067

    SHA256

    3823a537e612fe6e0453394242999cabb6d5070d49da22950102490d59fc6681

    SHA512

    c0116b326fe1a4adf4b0abcccf1cf14aa0ad3f6762c61650002e524c57d0af296dfbb575eca317cbe8ac144e50fd8d198ef4a62bcb49e47cbd4da26813a3c288

  • \ProgramData\word.exe
    Filesize

    273KB

    MD5

    773295382ac480e8db8fb2c1efad4cda

    SHA1

    ae7c78724b8e0c946dd12d2ebc61f0f11c911067

    SHA256

    3823a537e612fe6e0453394242999cabb6d5070d49da22950102490d59fc6681

    SHA512

    c0116b326fe1a4adf4b0abcccf1cf14aa0ad3f6762c61650002e524c57d0af296dfbb575eca317cbe8ac144e50fd8d198ef4a62bcb49e47cbd4da26813a3c288

  • memory/1416-54-0x000007FEFB9F1000-0x000007FEFB9F3000-memory.dmp
    Filesize

    8KB

  • memory/1556-57-0x0000000000000000-mapping.dmp