Analysis

  • max time kernel
    107s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 18:57

General

  • Target

    INVOICE.exe

  • Size

    416KB

  • MD5

    a4975ac7f40ccf4d1803e8edb97dce9e

  • SHA1

    2c7d642447cfb2a4b1ce65659ed383b0c96f11ed

  • SHA256

    fda1d068f7b5e8dcbaa65b83088db628ebc9e6420a9fdd258fb5f62bcb4b0935

  • SHA512

    e7b9c414498f1bf101aaa8a77f94266acf6099cb62e9027a8707d71195ece5f67c48745e3f72b7f77ea15bce803990852f3668c8069b2ab4e49b527e4165a681

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.ionos.es
  • Port:
    587
  • Username:
    bailen@famorga.com
  • Password:
    Famorga2017

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.ionos.es
  • Port:
    587
  • Username:
    bailen@famorga.com
  • Password:
    Famorga2017

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INVOICE.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4696
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fmElvmhYYNFPQr" /XML "C:\Users\Admin\AppData\Local\Temp\tmp635D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:328
    • C:\Users\Admin\AppData\Local\Temp\INVOICE.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:3740

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

Query Registry

1
T1012

System Information Discovery

2
T1082

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\INVOICE.exe.log
    Filesize

    507B

    MD5

    76ffb2f33cb32ade8fc862a67599e9d8

    SHA1

    920cc4ab75b36d2f9f6e979b74db568973c49130

    SHA256

    f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310

    SHA512

    f33502c2e1bb30c05359bfc6819ca934642a1e01874e3060349127d792694d56ad22fccd6c9477b8ee50d66db35785779324273f509576b48b7f85577e001b4e

  • C:\Users\Admin\AppData\Local\Temp\tmp635D.tmp
    Filesize

    1KB

    MD5

    f0bd468898e306b8a95fc827d4d694e7

    SHA1

    3736d18ed0e6e5a19bca109a9995013ee0d369ab

    SHA256

    d04365981eb0071431cbef12c79ab263f2b931e2bbf45dea03fe36b14c7ec3c0

    SHA512

    4a2848236c86b6c5ef10618cae8afc1452e8be650e1838ae4ca01c2bca51c322a8420d71118b22d035e51d2bbe4c46960828d73dbe04ad8c58ed5daf813b6db9

  • memory/328-134-0x0000000000000000-mapping.dmp
  • memory/3740-136-0x0000000000000000-mapping.dmp
  • memory/3740-137-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/3740-139-0x0000000005E00000-0x0000000005E66000-memory.dmp
    Filesize

    408KB

  • memory/3740-140-0x0000000006430000-0x0000000006480000-memory.dmp
    Filesize

    320KB

  • memory/3740-141-0x00000000068F0000-0x00000000068FA000-memory.dmp
    Filesize

    40KB

  • memory/4696-130-0x0000000000E20000-0x0000000000E8E000-memory.dmp
    Filesize

    440KB

  • memory/4696-131-0x0000000005E90000-0x0000000006434000-memory.dmp
    Filesize

    5.6MB

  • memory/4696-132-0x00000000058E0000-0x0000000005972000-memory.dmp
    Filesize

    584KB

  • memory/4696-133-0x0000000006720000-0x00000000067BC000-memory.dmp
    Filesize

    624KB