Analysis

  • max time kernel
    114s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    08-07-2020 06:33

General

  • Target

    InquiryPo 08 07 020_PDF.exe

  • Size

    874KB

  • MD5

    4f7a9ac854a2f793af939a85e0907a50

  • SHA1

    ec1fc7da2d96b18e09cb5fad0f65fdf344bcb901

  • SHA256

    033e072066199b1ad85444191f19a03d8b15ec628930b4e86d7b5fb5e0a0baae

  • SHA512

    8889dce81db6b401f1c20c202d41d0e926969f834a7892f2b73c217f19f591cd8bc993a4e069a2bad485cc6103638e36c3774701846b96140cc4da7adc748a8c

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.mosaiclayouts.com
  • Port:
    587
  • Username:
    sales@mosaiclayouts.com
  • Password:
    UY$W4+]^+9;)7CF5

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\InquiryPo 08 07 020_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\InquiryPo 08 07 020_PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1124
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ueZzAScceWp" /XML "C:\Users\Admin\AppData\Local\Temp\tmp845B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:912
    • C:\Users\Admin\AppData\Local\Temp\InquiryPo 08 07 020_PDF.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:540

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\tmp845B.tmp
    MD5

    74d6f19f3a452f9f8af8cfdffa3707c5

    SHA1

    4a9f73da46ad6b612ca266f7fa6efda89263f046

    SHA256

    f1c5eb7bea77ddb86c863e93226741c973bbe2ba8600498d12671f5e96cce722

    SHA512

    db7beafa918fee6205418369a5f898eecae5d2cf37d903d490e3d3a472a73e923da565668582c1aca92e52b9049a62ec4a38f25673e0f369f54863795a4597ce

  • memory/540-4-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/540-5-0x000000000044797E-mapping.dmp
  • memory/540-6-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/540-7-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/912-2-0x0000000000000000-mapping.dmp
  • memory/1124-1-0x0000000000000000-0x0000000000000000-disk.dmp