Analysis

  • max time kernel
    121s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:55

General

  • Target

    BL Draft Copy-shipping Documents3-12-06-20.EXCEL.XLS.xlsx.exe

  • Size

    408KB

  • MD5

    f7bb48793e8d292597ffd8e8782bc597

  • SHA1

    157cca571614e2cfcabf4ced974869bc8ca1c41b

  • SHA256

    f027cf4d4648d73779ecd0126f3a7bdfd7621d8a7846cac4d6515ac1a6442be9

  • SHA512

    cd55240f4c9f9197cd5073e5937c5f2eb9794b167ae7727286443b5d8dfeb34464fdee8b7183d630f066d35ae0a007c8bc56f3a63750c7f42241a302c2684196

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.ibc.by
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    QWErty654321

Signatures

  • AgentTesla

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

  • AgentTesla Payload 6 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
  • 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 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BL Draft Copy-shipping Documents3-12-06-20.EXCEL.XLS.xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\BL Draft Copy-shipping Documents3-12-06-20.EXCEL.XLS.xlsx.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:732
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SKUWzUAyeDjaa" /XML "C:\Users\Admin\AppData\Local\Temp\tmp97FC.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2032
    • C:\Users\Admin\AppData\Local\Temp\BL Draft Copy-shipping Documents3-12-06-20.EXCEL.XLS.xlsx.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:1808

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp97FC.tmp
    Filesize

    1KB

    MD5

    adaeb00c42b3cf6778584d0ed058e36e

    SHA1

    b515ccc6ef985031cc24ed258894c30c72f29196

    SHA256

    3521bd7806acab859e9c619a93e8d2b9fa025f7b26a590fa197af6e4eec1bab8

    SHA512

    b939dc6f5554f23de92602a5a54ffd977372bb4b983744cb977083edeb652279c7314d4f74b57983d89c632d4c91cc26226678cdd22a49e280b6800ab00b3ec0

  • memory/732-55-0x0000000074740000-0x0000000074CEB000-memory.dmp
    Filesize

    5.7MB

  • memory/732-54-0x0000000075781000-0x0000000075783000-memory.dmp
    Filesize

    8KB

  • memory/1808-61-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-58-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-59-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-62-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-64-0x000000000044817E-mapping.dmp
  • memory/1808-63-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-66-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-68-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1808-70-0x0000000074740000-0x0000000074CEB000-memory.dmp
    Filesize

    5.7MB

  • memory/2032-56-0x0000000000000000-mapping.dmp