Analysis

  • max time kernel
    300s
  • max time network
    300s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    02-12-2021 12:53

General

  • Target

    PURCHASE ORDER #298767649DF.exe

  • Size

    571KB

  • MD5

    38b5e64b40b7385e941853fafcca52ed

  • SHA1

    3500d74b58a12151a541865eb72e54dc97553a8f

  • SHA256

    0a15fc96322463009c95cafcf720acb2eb9dbee7baffbd1131532891db885a6e

  • SHA512

    33b99a75e63d5d4497ef6a85e2a9f6cd3248a1110acec2864457b300194acdd582d9da6e932d9abca9265613495bbc753777066d4181462aef08862b89f96d6a

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.dieseltronic.com.pe
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Asdiesel2019@?%%%,

Signatures

  • AgentTesla

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

  • AgentTesla Payload 5 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER #298767649DF.exe
    "C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER #298767649DF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1532
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KVsqXGOgiWC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFDEE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1924
    • C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER #298767649DF.exe
      "{path}"
      2⤵
        PID:1096
      • C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER #298767649DF.exe
        "{path}"
        2⤵
        • Drops file in Drivers directory
        • Accesses Microsoft Outlook profiles
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:1668

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpFDEE.tmp
      MD5

      6b0f2204097a0b701f8ffbef0920b795

      SHA1

      fb28b72fa0d4705e02e17791ef1acef8ad530c28

      SHA256

      32b70e48bd37c5a003cc2114ecb6ca9602be97358f80db5c89070fa017c05e04

      SHA512

      f48a2a15ffa861e00ec4cf53932d8ca4585f91ce09ea1f190dfa3ac41f610ce3882ff635695254d033898eba8efa2b1ffb10008b2bcdf7d88cc7bce88875e3f1

    • memory/1532-57-0x00000000764D1000-0x00000000764D3000-memory.dmp
      Filesize

      8KB

    • memory/1532-58-0x0000000005060000-0x0000000005061000-memory.dmp
      Filesize

      4KB

    • memory/1532-59-0x0000000000220000-0x0000000000225000-memory.dmp
      Filesize

      20KB

    • memory/1532-60-0x0000000005500000-0x0000000005580000-memory.dmp
      Filesize

      512KB

    • memory/1532-61-0x00000000004D0000-0x0000000000508000-memory.dmp
      Filesize

      224KB

    • memory/1532-55-0x0000000001200000-0x0000000001201000-memory.dmp
      Filesize

      4KB

    • memory/1668-64-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1668-65-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1668-67-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1668-66-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1668-68-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1668-69-0x000000000043763E-mapping.dmp
    • memory/1668-70-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1668-72-0x0000000004AA0000-0x0000000004AA1000-memory.dmp
      Filesize

      4KB

    • memory/1668-73-0x0000000004AA1000-0x0000000004AA2000-memory.dmp
      Filesize

      4KB

    • memory/1924-62-0x0000000000000000-mapping.dmp