Analysis

  • max time kernel
    131s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    21-10-2021 07:06

General

  • Target

    PAYMENT FOR OVERDUE INVOICE1.exe

  • Size

    480KB

  • MD5

    b34e1e34c7bca027e497a2c98b87a4d3

  • SHA1

    80bd380e72a110e51dde2e0a0492b2f9ce61a6dd

  • SHA256

    ca08070182c0182cabcae7e0fb3aea143e41d43e4bde4bd21dc04838d4bd417e

  • SHA512

    da37ac7697f9346bde68781ff7038ad7e6dde6f7485bdaa01553d4d2c7b9bfbdef1e18012cd0f806f39b5d220746549c57be0eae26e2efd90bb63947948343e4

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    mmm777

Signatures

  • AgentTesla

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

  • AgentTesla Payload 5 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\PAYMENT FOR OVERDUE INVOICE1.exe
    "C:\Users\Admin\AppData\Local\Temp\PAYMENT FOR OVERDUE INVOICE1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1384
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xsFqGJAH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp495F.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1068
    • C:\Users\Admin\AppData\Local\Temp\PAYMENT FOR OVERDUE INVOICE1.exe
      "C:\Users\Admin\AppData\Local\Temp\PAYMENT FOR OVERDUE INVOICE1.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:1108

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1068-59-0x0000000000000000-mapping.dmp

  • memory/1108-63-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1108-65-0x000000000043782E-mapping.dmp

  • memory/1108-69-0x00000000049C1000-0x00000000049C2000-memory.dmp

    Filesize

    4KB

  • memory/1108-68-0x00000000049C0000-0x00000000049C1000-memory.dmp

    Filesize

    4KB

  • memory/1108-66-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1108-60-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1108-61-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1108-62-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1108-64-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1384-53-0x00000000009F0000-0x00000000009F1000-memory.dmp

    Filesize

    4KB

  • memory/1384-56-0x00000000005C0000-0x00000000005C7000-memory.dmp

    Filesize

    28KB

  • memory/1384-55-0x00000000768C1000-0x00000000768C3000-memory.dmp

    Filesize

    8KB

  • memory/1384-58-0x0000000005020000-0x0000000005078000-memory.dmp

    Filesize

    352KB

  • memory/1384-57-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

    Filesize

    4KB