Analysis

  • max time kernel
    131s
  • max time network
    55s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    27-07-2021 21:03

General

  • Target

    PR4007-PO161.exe

  • Size

    829KB

  • MD5

    e70025359ef960acb7a37572b0641ed2

  • SHA1

    a315ab77f2519de210727579b8cf98338144f105

  • SHA256

    650032961db3668f23cabc3c999e1efddae68bd77a9751de212d8ed9b719821e

  • SHA512

    7f7b91c83a51a95731b112cbe29a682fde5df678155ec66186e87ac67200655dc6bf97c3d37026e0e4b3b26b4a265e366fafbb511ae38650c5b2645c71dca675

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.afciphil.com.ph
  • Port:
    587
  • Username:
    importdox_jberedo@afciphil.com.ph
  • Password:
    r35eCaR@t4

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Drops file in Drivers directory 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.

  • 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PR4007-PO161.exe
    "C:\Users\Admin\AppData\Local\Temp\PR4007-PO161.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:292
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LNFrmOl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp80C4.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:944
    • C:\Users\Admin\AppData\Local\Temp\PR4007-PO161.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1836

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

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\tmp80C4.tmp
    MD5

    1e678b557966b3d40c0aca1b2a1cd331

    SHA1

    480519abf3ba1408751ef2d132fc2b1c438bbbd5

    SHA256

    62f039ecc7daa4ec656a0ca93350211e137a5370fcf236eb659342bc856dc327

    SHA512

    625762eeb93d1ff853d458b0ff65b80ec053ecddd25073b34a0562a6d2f2f340261fc4e127ef871d930f20e676bf91d354c5e5541db68bee9529ece5d09757b8

  • memory/292-59-0x0000000000130000-0x0000000000131000-memory.dmp
    Filesize

    4KB

  • memory/292-61-0x00000000048B0000-0x00000000048B1000-memory.dmp
    Filesize

    4KB

  • memory/292-62-0x00000000005F0000-0x00000000005F2000-memory.dmp
    Filesize

    8KB

  • memory/292-63-0x0000000007C70000-0x0000000007CF3000-memory.dmp
    Filesize

    524KB

  • memory/292-64-0x00000000040E0000-0x0000000004124000-memory.dmp
    Filesize

    272KB

  • memory/944-65-0x0000000000000000-mapping.dmp
  • memory/1836-67-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1836-68-0x000000000043762E-mapping.dmp
  • memory/1836-69-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1836-71-0x0000000004C50000-0x0000000004C51000-memory.dmp
    Filesize

    4KB

  • memory/1836-72-0x0000000004C51000-0x0000000004C52000-memory.dmp
    Filesize

    4KB