Analysis

  • max time kernel
    133s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    25-10-2021 11:02

General

  • Target

    72370ce75aaf466bc048e00a108ecb8126ffc80b.exe

  • Size

    963KB

  • MD5

    378d5f97d0e28d2ead7fed9dc4abb798

  • SHA1

    72370ce75aaf466bc048e00a108ecb8126ffc80b

  • SHA256

    780de7b808b5dba8e6ef57a82e264dcbbbdc2f63de3ef6683c8627bd177c5103

  • SHA512

    0bceb95865026c1d9d8fe0df72760acbaf5c5729f11652cd9c8469076f07264545fe08519c45a2d020b99e5ddb2a43fff8a3e04e51bfb7bc0d055d79b415afa4

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    webmail.fllid.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ImbangFll

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
  • Accesses Microsoft Outlook profiles 1 TTPs 3 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\72370ce75aaf466bc048e00a108ecb8126ffc80b.exe
    "C:\Users\Admin\AppData\Local\Temp\72370ce75aaf466bc048e00a108ecb8126ffc80b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fChjuz" /XML "C:\Users\Admin\AppData\Local\Temp\tmp56FB.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1800
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      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:984

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

Collection

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp56FB.tmp
    MD5

    6b7017b52e5308bc5b57b2d477866cdb

    SHA1

    cdc33403e552935c42e6cef825f439d8cc8174f2

    SHA256

    aaab9fcd51be22ff4bf7ca996e52884fa22e873704e51b02c1da8b47be0ebb3f

    SHA512

    342e3884107ac5243211cd8a2e1e8771fa0c0756872e13127b7bb00483fced87c9f4b3236907f02c5a6257b9b98a21bd511a2a425df52a4807975d4f997ee762

  • memory/984-65-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/984-74-0x0000000000E01000-0x0000000000E02000-memory.dmp
    Filesize

    4KB

  • memory/984-73-0x0000000000E00000-0x0000000000E01000-memory.dmp
    Filesize

    4KB

  • memory/984-71-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/984-70-0x00000000004379FE-mapping.dmp
  • memory/984-69-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/984-68-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/984-66-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/984-67-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1612-59-0x0000000004CF2000-0x0000000004CF3000-memory.dmp
    Filesize

    4KB

  • memory/1612-62-0x0000000008530000-0x000000000859C000-memory.dmp
    Filesize

    432KB

  • memory/1612-61-0x0000000008490000-0x0000000008527000-memory.dmp
    Filesize

    604KB

  • memory/1612-60-0x0000000000950000-0x000000000095E000-memory.dmp
    Filesize

    56KB

  • memory/1612-54-0x0000000000DD0000-0x0000000000DD1000-memory.dmp
    Filesize

    4KB

  • memory/1612-58-0x0000000004CF1000-0x0000000004CF2000-memory.dmp
    Filesize

    4KB

  • memory/1612-57-0x0000000004CF0000-0x0000000004CF1000-memory.dmp
    Filesize

    4KB

  • memory/1612-56-0x00000000751A1000-0x00000000751A3000-memory.dmp
    Filesize

    8KB

  • memory/1800-63-0x0000000000000000-mapping.dmp