Analysis

  • max time kernel
    300s
  • max time network
    301s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    22-10-2021 03:52

General

  • Target

    67589923.EXE

  • Size

    594KB

  • MD5

    9f7e59995263b92231ca69911bc9d20e

  • SHA1

    a79d7e3f0a49ec5324d8631d41f46a833d3a520e

  • SHA256

    3e8eb7a331ed3b1699d2138aecfa519cb744b9eccb52909420d3d3bed9a3ca05

  • SHA512

    b9a1c3d87ad255ec7baa65665ac1b6004a737f0e411b89d38b8f8a796bbc9b882010fed2b4fec5b5b39f49dfc65718caafdcf569030d04d971631617c5a179e8

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    webmail.vector-kl.com
  • Port:
    587
  • Username:
    amin@vector-kl.com
  • Password:
    AminVectorKL202)

Signatures

  • AgentTesla

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

  • AgentTesla Payload 5 IoCs
  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\67589923.EXE
    "C:\Users\Admin\AppData\Local\Temp\67589923.EXE"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:580
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\FJlDVbRs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp82B7.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1488
    • C:\Users\Admin\AppData\Local\Temp\67589923.EXE
      "C:\Users\Admin\AppData\Local\Temp\67589923.EXE"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:848

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

2
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/580-55-0x0000000000280000-0x0000000000281000-memory.dmp
    Filesize

    4KB

  • memory/580-57-0x0000000075AC1000-0x0000000075AC3000-memory.dmp
    Filesize

    8KB

  • memory/580-58-0x0000000004D30000-0x0000000004D31000-memory.dmp
    Filesize

    4KB

  • memory/580-59-0x0000000000380000-0x0000000000387000-memory.dmp
    Filesize

    28KB

  • memory/580-60-0x0000000004FF0000-0x0000000005047000-memory.dmp
    Filesize

    348KB

  • memory/848-62-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/848-63-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/848-64-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/848-65-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/848-66-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/848-67-0x0000000000436D1E-mapping.dmp
  • memory/848-68-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/848-70-0x0000000000830000-0x0000000000831000-memory.dmp
    Filesize

    4KB

  • memory/1488-61-0x0000000000000000-mapping.dmp