Analysis

  • max time kernel
    131s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:13

General

  • Target

    Payment Advice.exe

  • Size

    691KB

  • MD5

    26af78ad5b6bde747cb7c5b6798d13f7

  • SHA1

    28ebe93177032569db769b91ccd9e0992b76149d

  • SHA256

    c937a2903274b2498a1d488de6d7cf11811d9dc51749e4c4256262e1236473f8

  • SHA512

    159f1f5a13df5bb408376429278955d723117bd46097a7e1ecccfb248a0dbc0ef22708a76e5c6cf14c9b2b5ec2458505b01e9788fd3da734726b565e048023c6

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.grandtours.gr
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    !Bitter-bullet-chuck-major!

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.grandtours.gr
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    !Bitter-bullet-chuck-major!

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
  • Adds Run key to start application 2 TTPs 1 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment Advice.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment Advice.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1884
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dYsSYgDjRqcG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8D9.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1332
    • C:\Users\Admin\AppData\Local\Temp\Payment Advice.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:3736

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    1KB

    MD5

    2dc88967f8ab98d834998c930371997a

    SHA1

    fe54fd90824e71d0df04a47f460e1f72b9e1ffc4

    SHA256

    454ef7333f3fcdfff8957611a2bc97b3ab5aca972406b6d323e407424f2e7da9

    SHA512

    975af2932004d1f90474b2e0be35143e1c824c51d92b504cffb52036a4f37f1b62256c5c536089b570f23ada2cf37bbd3af96b14ebfdcfaacf7a65ba406cda77

  • C:\Users\Admin\AppData\Local\Temp\tmp8D9.tmp

    Filesize

    1KB

    MD5

    b3ec6f3232dc08f7b732e655898bbee1

    SHA1

    fcf31750e2f0dafdeda18b69c406a887fac23ace

    SHA256

    51b526304bcb288bbdf5bbbb36ea4ea2311b4fbf31d2543638f29a176dda7587

    SHA512

    4e4bee4fd550e05fc7942c1024642bb189d044d88024e0edd137272c968bf2e409a4367bef988da18995e7e90d97313d63aefaf5c17ee14b224bfc87318bb2bc

  • memory/1332-136-0x0000000000000000-mapping.dmp

  • memory/1884-133-0x00000000052B0000-0x00000000052BA000-memory.dmp

    Filesize

    40KB

  • memory/1884-134-0x0000000005340000-0x00000000053A6000-memory.dmp

    Filesize

    408KB

  • memory/1884-135-0x0000000008080000-0x000000000811C000-memory.dmp

    Filesize

    624KB

  • memory/1884-130-0x00000000006B0000-0x0000000000764000-memory.dmp

    Filesize

    720KB

  • memory/1884-132-0x0000000005110000-0x00000000051A2000-memory.dmp

    Filesize

    584KB

  • memory/1884-131-0x00000000055C0000-0x0000000005B64000-memory.dmp

    Filesize

    5.6MB

  • memory/3736-138-0x0000000000000000-mapping.dmp

  • memory/3736-139-0x0000000000400000-0x0000000000466000-memory.dmp

    Filesize

    408KB

  • memory/3736-141-0x00000000062B0000-0x0000000006316000-memory.dmp

    Filesize

    408KB

  • memory/3736-142-0x0000000006920000-0x0000000006970000-memory.dmp

    Filesize

    320KB