Analysis

  • max time kernel
    120s
  • max time network
    14s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    26-11-2020 07:08

General

  • Target

    SOA_payment_balance.doc.gz.exe

  • Size

    586KB

  • MD5

    229140fb35f06ec6ba52883474691866

  • SHA1

    6bb4124f781efdbd906b88a87cef5d999dfd46ba

  • SHA256

    4415d19e0b69bdccf79c937db6fe491c4875367cc3ad808b233fa606c708c18b

  • SHA512

    3095dbfed4d4eccbc4871ce356c5c058e71ebd8978a16f4b5de573d8caa1efc2cc733ddc4da7e93c62efd9c61727e0ef9bf7a0e6a02316a9caaa86210fd3f0af

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    kthen@inprocorps.com
  • Password:
    riches22@123456

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 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.

  • 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\SOA_payment_balance.doc.gz.exe
    "C:\Users\Admin\AppData\Local\Temp\SOA_payment_balance.doc.gz.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:740
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rlSeAhW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp37E2.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1676
    • C:\Users\Admin\AppData\Local\Temp\SOA_payment_balance.doc.gz.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:728

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

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp37E2.tmp
    MD5

    c3170742eeefe70d7cdec130ccead1c4

    SHA1

    ca32196563c0570280fa03e40b14c04ed45c4258

    SHA256

    e83173332bb56b0c1c8aa6a5dd4e303cb8c9e99ea8919344eb63a0157a88bde3

    SHA512

    8b479d424507eccc46a95427c8e39532e247715bef48940ebea3bb97060b159f2f98297453bbc78df40379e2363b058573f13e99198fcc9755a76321d9c05118

  • memory/728-7-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/728-8-0x0000000000447D1E-mapping.dmp
  • memory/728-9-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/728-10-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/728-11-0x0000000074390000-0x0000000074A7E000-memory.dmp
    Filesize

    6.9MB

  • memory/740-0-0x0000000074390000-0x0000000074A7E000-memory.dmp
    Filesize

    6.9MB

  • memory/740-1-0x00000000013A0000-0x00000000013A1000-memory.dmp
    Filesize

    4KB

  • memory/740-3-0x00000000004D0000-0x00000000004E4000-memory.dmp
    Filesize

    80KB

  • memory/740-4-0x0000000007F40000-0x0000000007FB1000-memory.dmp
    Filesize

    452KB

  • memory/1676-5-0x0000000000000000-mapping.dmp