Analysis

  • max time kernel
    141s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    15-09-2021 06:53

General

  • Target

    required.exe

  • Size

    1.0MB

  • MD5

    08a652c3adb52cc860c1b35dc2838f23

  • SHA1

    6d630ca20b831dfa6db2b33ea1f0a256a1d13e60

  • SHA256

    63e6198cee195250e7ef3aedecfacdfeb6fdbce9e4f3fd9c1260ef67075819a3

  • SHA512

    7df0d8df46a9b44652a239c969f2da6bc81f15b91cc6ecfef9b904caf27dc73fa37494113651931f5c866e1f8b42503279addb0d209997a13cd646421d198c5f

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.rosaritoindustries.com
  • Port:
    587
  • Username:
    inquiry@rosaritoindustries.com
  • Password:
    aircondivision2019

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
  • 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 WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\required.exe
    "C:\Users\Admin\AppData\Local\Temp\required.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PkrqkOSPOWZhCz" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9914.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:856
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1160

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

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp9914.tmp
    MD5

    7c736aa7c2da3cb57b9328f7e058dc31

    SHA1

    0b613460d9f2fdeb506b8ac2edbe7989a6ecb44b

    SHA256

    79df27f59f9fa883a3c6c8f58102764530e8e4e7a195ac54c7e9ba834fc868a1

    SHA512

    dece70d828feccec17d131313170c79123f0b7855d7b1778b9737f7c3ad92cd1ab9183bb88809efd83b9e5f720e68398ed2c1092f9281c7a341b0cab6b263efd

  • memory/856-66-0x0000000000000000-mapping.dmp
  • memory/1160-68-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1160-69-0x000000000043784E-mapping.dmp
  • memory/1160-70-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1160-72-0x0000000004A30000-0x0000000004A31000-memory.dmp
    Filesize

    4KB

  • memory/1160-73-0x0000000004A31000-0x0000000004A32000-memory.dmp
    Filesize

    4KB

  • memory/1972-60-0x0000000000E90000-0x0000000000E91000-memory.dmp
    Filesize

    4KB

  • memory/1972-62-0x0000000000C60000-0x0000000000C61000-memory.dmp
    Filesize

    4KB

  • memory/1972-63-0x0000000000480000-0x000000000048E000-memory.dmp
    Filesize

    56KB

  • memory/1972-64-0x0000000007BC0000-0x0000000007C3D000-memory.dmp
    Filesize

    500KB

  • memory/1972-65-0x0000000000CA0000-0x0000000000CDA000-memory.dmp
    Filesize

    232KB