Analysis

  • max time kernel
    269s
  • max time network
    314s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    21-10-2021 00:36

General

  • Target

    4y1k7snP7le2PkK.exe

  • Size

    431KB

  • MD5

    b79c0f74126ea29b1a889182759ca168

  • SHA1

    abcf4f42e922ad538f0f8cca8307505a4ef0a3ac

  • SHA256

    db120792b5ad5e3f9bd864097f9f55c20c3852b680f53056f172fd3319906d13

  • SHA512

    d9215141cf3514aff9e5aef370f69b9eecb2cc08d3192ca45f12918f94fdcea42907104ef39d692db6bf866edca1e6448dbb6956d0b053db7e6ced9ad650933f

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.upgcambodia.com
  • Port:
    587
  • Username:
    stock@upgcambodia.com
  • Password:
    stock3168

Signatures

  • AgentTesla

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

  • AgentTesla Payload 5 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4y1k7snP7le2PkK.exe
    "C:\Users\Admin\AppData\Local\Temp\4y1k7snP7le2PkK.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1200
    • C:\Users\Admin\AppData\Local\Temp\4y1k7snP7le2PkK.exe
      "C:\Users\Admin\AppData\Local\Temp\4y1k7snP7le2PkK.exe"
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1740

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1200-53-0x0000000000F20000-0x0000000000F21000-memory.dmp
    Filesize

    4KB

  • memory/1200-55-0x00000000751A1000-0x00000000751A3000-memory.dmp
    Filesize

    8KB

  • memory/1200-56-0x0000000004D40000-0x0000000004D41000-memory.dmp
    Filesize

    4KB

  • memory/1200-57-0x0000000000AB0000-0x0000000000AB7000-memory.dmp
    Filesize

    28KB

  • memory/1200-58-0x0000000004BD0000-0x0000000004C28000-memory.dmp
    Filesize

    352KB

  • memory/1740-59-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1740-60-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1740-61-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1740-62-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1740-63-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1740-64-0x000000000043761E-mapping.dmp
  • memory/1740-65-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1740-67-0x0000000004AF0000-0x0000000004AF1000-memory.dmp
    Filesize

    4KB

  • memory/1740-68-0x0000000004AF1000-0x0000000004AF2000-memory.dmp
    Filesize

    4KB