Analysis

  • max time kernel
    138s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 12:41

General

  • Target

    PO-7890374.exe

  • Size

    488KB

  • MD5

    e9578b76923aaf0ef5c6ddd29f04c44b

  • SHA1

    fd105ad0cfaac1465e7773e1f5a98a4bdc9ab7d9

  • SHA256

    0e1398abdfa85e32529125bf46eca2248faa7baa07f114ead8e310fc05a73beb

  • SHA512

    fb064a5aad513cf8650d03b716e0502a920779a9c2f7f3db0628e65c89c439b72984f2efc21f43112874fff3cbe1c59d1cc0d8e4cc944ecd97abb043c280cc37

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://gsmtp.me/
  • Port:
    21
  • Username:
    mikano
  • Password:
    N1!4o8yg

  • Protocol:
    ftp
  • Host:
    ftp://gsmtp.me/
  • Port:
    21
  • Username:
    mikano
  • Password:
    N1!4o8yg

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\PO-7890374.exe
    "C:\Users\Admin\AppData\Local\Temp\PO-7890374.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:552
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nyDUFmqp" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF5D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1264
    • C:\Users\Admin\AppData\Local\Temp\PO-7890374.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:1456

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

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\tmpF5D.tmp
    Filesize

    1KB

    MD5

    8fefb2efeb0c8f0def8bd5246d5b0501

    SHA1

    fe8b4768119adcf5bc905986a6dc4a215ab5177d

    SHA256

    6e6c57563122695181d988ee5bcfe679e158acc83e05099b9e961630ee89caa7

    SHA512

    26b6bd9d24bae7df6022de80d39552e8493f3e4e1c9659795ad4fa8b2d48288852e017d6b3135e2ada5b0f97749509f9c23c242bd3572d19f0c8d0afc1af0b72

  • memory/552-54-0x0000000000B40000-0x0000000000BC0000-memory.dmp
    Filesize

    512KB

  • memory/552-55-0x0000000000390000-0x000000000039A000-memory.dmp
    Filesize

    40KB

  • memory/552-56-0x0000000004760000-0x00000000047B4000-memory.dmp
    Filesize

    336KB

  • memory/552-57-0x0000000075501000-0x0000000075503000-memory.dmp
    Filesize

    8KB

  • memory/1264-58-0x0000000000000000-mapping.dmp
  • memory/1456-60-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1456-61-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1456-63-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1456-64-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1456-65-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1456-66-0x0000000000446BAE-mapping.dmp
  • memory/1456-68-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1456-70-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB