Analysis

  • max time kernel
    49s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    30-03-2023 13:09

General

  • Target

    New PO #23546738.exe

  • Size

    707KB

  • MD5

    80c0b9e8a00242d0fb960584d89d745e

  • SHA1

    fb6bb9c955f030eb906e532813f7c7c6102ec55e

  • SHA256

    0a8368bab522deb622eca5805bc7bc6da0d4a6a63fae959c41c22c7d0b5ffa63

  • SHA512

    539017fd581d853b9e369eea90447001b08eb816948b3ab45fc9b082cfaaf65f1bb4b3af6cefb22bb1aae3190917ef47d41ce4c1794d546c2e023b628c6d3a71

  • SSDEEP

    12288:l3B2nTxM9+/nT92EiggkPIYP1QF7MKqv27bYyywV37Zb:lSbT92E8kPT1QFJ22GwVrF

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    tashkent@ess-lnvest-trading.com
  • Password:
    olu chu kwu 554
  • Email To:
    tashkent@ess-lnvest-trading.com

Signatures

  • AgentTesla

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

  • 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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\New PO #23546738.exe
    "C:\Users\Admin\AppData\Local\Temp\New PO #23546738.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YJmfGxcN" /XML "C:\Users\Admin\AppData\Local\Temp\tmp696.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1380
    • C:\Users\Admin\AppData\Local\Temp\New PO #23546738.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:996

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\tmp696.tmp
    Filesize

    1KB

    MD5

    fb515e0d9c40cf28de2021dd497bd474

    SHA1

    b22685c1061236a7f4b26080acb41399c4832373

    SHA256

    5cf344de3261990d13dda968a2138a9532bf6bd799b16caf6902bbb4f02ff138

    SHA512

    b85c3f053d4fc193eee5bf17da4616f60be3054a46a8a856f84c1cf7d6bdfa1d127ac3ae5b3332f8953bd6adaa44e5a50d66dd782974d68e70c3f3ceb2be47c6

  • memory/996-68-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/996-63-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/996-91-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/996-73-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/996-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/996-72-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/996-70-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/996-65-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/996-64-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/996-66-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1740-59-0x0000000004750000-0x0000000004780000-memory.dmp
    Filesize

    192KB

  • memory/1740-54-0x0000000000290000-0x0000000000346000-memory.dmp
    Filesize

    728KB

  • memory/1740-56-0x0000000000280000-0x000000000028C000-memory.dmp
    Filesize

    48KB

  • memory/1740-55-0x0000000000BC0000-0x0000000000C00000-memory.dmp
    Filesize

    256KB

  • memory/1740-58-0x00000000051B0000-0x000000000522C000-memory.dmp
    Filesize

    496KB

  • memory/1740-57-0x0000000000BC0000-0x0000000000C00000-memory.dmp
    Filesize

    256KB