Analysis

  • max time kernel
    157s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 01:42

General

  • Target

    Stone Quotation.exe

  • Size

    565KB

  • MD5

    75346fc05ce9a0921add66bfe01fb2e2

  • SHA1

    c833b6d3d6daf09ba2bc456157aac5c517dc3895

  • SHA256

    6bfaed4b195fabe34d859307606ab45f4be80702d73e60efce3147b3a75d48f6

  • SHA512

    afe384255acaa52130aaf690be1743edc38e3dd4da63443c4190c34bd9176b1fd35f8cf286f7944ba5ad9698e61ec0fdecaba993e1f98acd4069e68479d3e455

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.chenklins.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    VBRSv_r)C~mM

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AgentTesla Payload 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Stone Quotation.exe
    "C:\Users\Admin\AppData\Local\Temp\Stone Quotation.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2376
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c schtasks /Create /TN tenda /XML "C:\Users\Admin\AppData\Local\Temp\9853f71761e4486ba753aaab1f5bb940.xml"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4380
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /Create /TN tenda /XML "C:\Users\Admin\AppData\Local\Temp\9853f71761e4486ba753aaab1f5bb940.xml"
        3⤵
        • Creates scheduled task(s)
        PID:3496
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "C:\Users\Admin\AppData\Local\Temp\Stone Quotation.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:2468

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\9853f71761e4486ba753aaab1f5bb940.xml
    Filesize

    1KB

    MD5

    a535cdced814059851becca0bdd3a5a7

    SHA1

    7a81ee30ca6e574d013871c60f1d55f887155f93

    SHA256

    62b0b0dd65622f2603e3b3b5bc299ede24da9d152856042386ed8addef9b1c09

    SHA512

    dad0d930447a40da974686a8a10571afe1ed3780a0192067a6727683eb2290b95e33c3408709389d554569a5598fde9a072900471be2050a067cf104701c8089

  • memory/2376-131-0x00000000007A0000-0x0000000000832000-memory.dmp
    Filesize

    584KB

  • memory/2468-134-0x0000000000000000-mapping.dmp
  • memory/2468-135-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/2468-136-0x00000000755C0000-0x0000000075B71000-memory.dmp
    Filesize

    5.7MB

  • memory/3496-132-0x0000000000000000-mapping.dmp
  • memory/4380-130-0x0000000000000000-mapping.dmp