Analysis

  • max time kernel
    90s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 18:55

General

  • Target

    Documents.exe

  • Size

    583KB

  • MD5

    32f65b5608137599eb88b876132d1321

  • SHA1

    233b379864856fbf578425af6143595c3b264382

  • SHA256

    5f2517598649fe78e58966a15e9fea89e43ee57aa0ad6b779ef18be53eb39a2b

  • SHA512

    26e6b68e113253339188c9c40358374385be4e68f323c045b09eac0d1e726ec8dfb596b2775125d60b57ec60185a2980b3069e9cd5bad44323c3215235c76f4b

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.1and1.com
  • Port:
    587
  • Username:
    usjobs@ramsoft.net
  • Password:
    $Hari@prasad%2020

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.1and1.com
  • Port:
    587
  • Username:
    usjobs@ramsoft.net
  • Password:
    $Hari@prasad%2020

Signatures

  • AgentTesla

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

  • suricata: ET MALWARE AgentTesla Exfil Via SMTP

    suricata: ET MALWARE AgentTesla Exfil Via SMTP

  • AgentTesla Payload 1 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
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Documents.exe
    "C:\Users\Admin\AppData\Local\Temp\Documents.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1572
    • C:\Users\Admin\AppData\Local\Temp\Documents.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:4572

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Documents.exe.log
    Filesize

    1KB

    MD5

    400f1cc1a0a0ce1cdabda365ab3368ce

    SHA1

    1ecf683f14271d84f3b6063493dce00ff5f42075

    SHA256

    c8fa64f4b69df13ed6408fd4a204f318a36c2f38c85d4a4d42adfc9173f73765

    SHA512

    14c8cfd58d097e5e89c8cabe1e665173f1ccf604a9ef70cdcb84116e265f90819c19c891be408e0ad7e29086a5c2ea2883b7a7d1184878dbbac63e2cabcd1c45

  • memory/1572-130-0x0000000000D50000-0x0000000000DE8000-memory.dmp
    Filesize

    608KB

  • memory/1572-131-0x0000000005EF0000-0x0000000006494000-memory.dmp
    Filesize

    5.6MB

  • memory/1572-132-0x0000000005AE0000-0x0000000005B72000-memory.dmp
    Filesize

    584KB

  • memory/1572-133-0x0000000005B90000-0x0000000005B9A000-memory.dmp
    Filesize

    40KB

  • memory/1572-134-0x00000000098A0000-0x000000000993C000-memory.dmp
    Filesize

    624KB

  • memory/4572-135-0x0000000000000000-mapping.dmp
  • memory/4572-136-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/4572-138-0x00000000059C0000-0x0000000005A26000-memory.dmp
    Filesize

    408KB

  • memory/4572-139-0x00000000068E0000-0x0000000006930000-memory.dmp
    Filesize

    320KB