Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-03-2024 01:12

General

  • Target

    CV Mariana Alvarez.exe

  • Size

    622KB

  • MD5

    467111735472753ad98e8500663b1de7

  • SHA1

    8986442fd28e74c6f55baf354002dd678f73995e

  • SHA256

    b85123da03ee5c76a1a98d7b8a5c56cc07efe444b9cbf9f2c1f8813fa324ce6a

  • SHA512

    892f17af5c873a5e9717c72b1c5c7783536872e89e42663079c9f0848b8a104ad29d231ae7bd4a62d6fd49996ac5fb516dffd058cbe26e5f74ef4cad7306894e

  • SSDEEP

    12288:aa5WDRFksUKQNuqq2QJrK9E8qIr18hrQBQKXXUaHMvA1dmGBLyrN1H80UjHgJ:+HkswdxkrK9E8zrWJcxt9dmKyrN1u

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.flying-fish-cn.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    hkk999@@@

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • 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.

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CV Mariana Alvarez.exe
    "C:\Users\Admin\AppData\Local\Temp\CV Mariana Alvarez.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3324
    • C:\Users\Admin\AppData\Local\Temp\CV Mariana Alvarez.exe
      "C:\Users\Admin\AppData\Local\Temp\CV Mariana Alvarez.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4048
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4016 --field-trial-handle=2588,i,4353937220825226770,7138584070663735671,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:344

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Credential Access

    Unsecured Credentials

    4
    T1552

    Credentials In Files

    3
    T1552.001

    Credentials in Registry

    1
    T1552.002

    Collection

    Data from Local System

    4
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\CV Mariana Alvarez.exe.log
      Filesize

      1KB

      MD5

      8ec831f3e3a3f77e4a7b9cd32b48384c

      SHA1

      d83f09fd87c5bd86e045873c231c14836e76a05c

      SHA256

      7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

      SHA512

      26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

    • memory/3324-10-0x0000000074490000-0x0000000074C40000-memory.dmp
      Filesize

      7.7MB

    • memory/3324-15-0x0000000074490000-0x0000000074C40000-memory.dmp
      Filesize

      7.7MB

    • memory/3324-3-0x0000000005870000-0x0000000005902000-memory.dmp
      Filesize

      584KB

    • memory/3324-4-0x00000000057B0000-0x00000000057C0000-memory.dmp
      Filesize

      64KB

    • memory/3324-5-0x00000000057D0000-0x00000000057DA000-memory.dmp
      Filesize

      40KB

    • memory/3324-6-0x0000000005AE0000-0x0000000005B7C000-memory.dmp
      Filesize

      624KB

    • memory/3324-7-0x0000000005AC0000-0x0000000005AD2000-memory.dmp
      Filesize

      72KB

    • memory/3324-11-0x00000000057B0000-0x00000000057C0000-memory.dmp
      Filesize

      64KB

    • memory/3324-9-0x0000000008100000-0x0000000008182000-memory.dmp
      Filesize

      520KB

    • memory/3324-2-0x0000000005D80000-0x0000000006324000-memory.dmp
      Filesize

      5.6MB

    • memory/3324-8-0x0000000005AD0000-0x0000000005ADC000-memory.dmp
      Filesize

      48KB

    • memory/3324-0-0x0000000000D70000-0x0000000000E10000-memory.dmp
      Filesize

      640KB

    • memory/3324-1-0x0000000074490000-0x0000000074C40000-memory.dmp
      Filesize

      7.7MB

    • memory/4048-19-0x0000000006BE0000-0x0000000006C30000-memory.dmp
      Filesize

      320KB

    • memory/4048-16-0x0000000074490000-0x0000000074C40000-memory.dmp
      Filesize

      7.7MB

    • memory/4048-17-0x0000000005690000-0x00000000056A0000-memory.dmp
      Filesize

      64KB

    • memory/4048-18-0x00000000054A0000-0x0000000005506000-memory.dmp
      Filesize

      408KB

    • memory/4048-12-0x0000000000400000-0x0000000000440000-memory.dmp
      Filesize

      256KB

    • memory/4048-20-0x0000000074490000-0x0000000074C40000-memory.dmp
      Filesize

      7.7MB

    • memory/4048-21-0x0000000005690000-0x00000000056A0000-memory.dmp
      Filesize

      64KB