Analysis

  • max time kernel
    146s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    23-10-2021 08:26

General

  • Target

    c13206d0.exe

  • Size

    949KB

  • MD5

    ca30044b80c7eb142fdb58d35199dee1

  • SHA1

    d985cd5a87ce17612fab903b934caf86447115c2

  • SHA256

    c13206d017b7aab500f5d5e7800ff25c9c09fde13e83f6511d444d19fcebf528

  • SHA512

    a82bba62fcee4b9d72b57bc0f34933c068fd3b7ecfa3fe4579b0d4c8abbcfd3d2e4760f3c189f76b6901ffb526112d4dd1d1624ba7c7bba9e747bf1f38ca3449

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.dellvidi.com
  • Port:
    587
  • Username:
    merchant2@dellvidi.com
  • Password:
    merchant2####

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 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 5 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c13206d0.exe
    "C:\Users\Admin\AppData\Local\Temp\c13206d0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4304
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yYZogvDLX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp89EC.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:608
    • C:\Users\Admin\AppData\Local\Temp\c13206d0.exe
      "C:\Users\Admin\AppData\Local\Temp\c13206d0.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: RenamesItself
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:764

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

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\c13206d0.exe.log
    MD5

    0c2899d7c6746f42d5bbe088c777f94c

    SHA1

    622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

    SHA256

    5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

    SHA512

    ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

  • memory/608-126-0x0000000000000000-mapping.dmp
  • memory/764-136-0x0000000006320000-0x0000000006321000-memory.dmp
    Filesize

    4KB

  • memory/764-135-0x0000000005A40000-0x0000000005A41000-memory.dmp
    Filesize

    4KB

  • memory/764-134-0x00000000055C0000-0x0000000005ABE000-memory.dmp
    Filesize

    5.0MB

  • memory/764-128-0x000000000043701E-mapping.dmp
  • memory/764-127-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/4304-120-0x0000000005470000-0x0000000005471000-memory.dmp
    Filesize

    4KB

  • memory/4304-124-0x00000000057B0000-0x00000000057B2000-memory.dmp
    Filesize

    8KB

  • memory/4304-125-0x0000000006080000-0x00000000060C6000-memory.dmp
    Filesize

    280KB

  • memory/4304-123-0x0000000006360000-0x00000000063D3000-memory.dmp
    Filesize

    460KB

  • memory/4304-122-0x00000000054A0000-0x00000000054B3000-memory.dmp
    Filesize

    76KB

  • memory/4304-121-0x00000000057E0000-0x00000000057E1000-memory.dmp
    Filesize

    4KB

  • memory/4304-115-0x0000000000B50000-0x0000000000B51000-memory.dmp
    Filesize

    4KB

  • memory/4304-119-0x0000000005440000-0x00000000054D2000-memory.dmp
    Filesize

    584KB

  • memory/4304-118-0x00000000054E0000-0x00000000054E1000-memory.dmp
    Filesize

    4KB

  • memory/4304-117-0x0000000005B00000-0x0000000005B01000-memory.dmp
    Filesize

    4KB