Analysis

  • max time kernel
    4294194s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20220311-en
  • submitted
    14-04-2022 12:34

General

  • Target

    986efb76b3f07c81294445c6845cb2606a8defff65166ce9967753b43484a01a.exe

  • Size

    854KB

  • MD5

    f3a67d95d42e4418dd640758b5302ce5

  • SHA1

    29910d022b481416b95f3bd1437f332290956dff

  • SHA256

    986efb76b3f07c81294445c6845cb2606a8defff65166ce9967753b43484a01a

  • SHA512

    dcf03e5599c29c0f62fc72cfd9870bcc0c5d32cd1adfa280a86dc11fd2f3e35b44a13506f34b415ced1bb74b5f723ee0714bae4d43740e6102b58ad4b72ce581

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Prince11

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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 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\986efb76b3f07c81294445c6845cb2606a8defff65166ce9967753b43484a01a.exe
    "C:\Users\Admin\AppData\Local\Temp\986efb76b3f07c81294445c6845cb2606a8defff65166ce9967753b43484a01a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ANiDrL" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD910.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1388
    • C:\Users\Admin\AppData\Local\Temp\986efb76b3f07c81294445c6845cb2606a8defff65166ce9967753b43484a01a.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:932

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpD910.tmp

    Filesize

    1KB

    MD5

    d846cfe8377ffa0c12f967bc0104dbd3

    SHA1

    a26d84264c4e60036663e5c2e61702ab1cc0f055

    SHA256

    783de308f4f450e2d4e4bd411bcb73c80704467c586c78162c916f73b97fe847

    SHA512

    a48d06b922ed726c278f575e5e539f14ef648125f5830750cbb24533bd8fcf62de205cc48eb94e8ac8abb6e4bf2ef29e48a2872a9675fbcf25c40c2cd3caf4fe

  • memory/932-64-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/932-59-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/932-60-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/932-62-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/932-63-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/932-67-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/932-69-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1832-56-0x0000000008230000-0x00000000082E4000-memory.dmp

    Filesize

    720KB

  • memory/1832-55-0x0000000000600000-0x000000000061E000-memory.dmp

    Filesize

    120KB

  • memory/1832-54-0x0000000000A80000-0x0000000000B5C000-memory.dmp

    Filesize

    880KB