Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-03-2024 11:30

General

  • Target

    CV Mariana Alvarez.exe

  • Size

    670KB

  • MD5

    a7b5278a3cb702e9a35e81e9499b02f6

  • SHA1

    27e6ea7acc6866cf0b33e74aa0b14c397c207a70

  • SHA256

    a04149b5e4fd34db0eb6dbbb815f47a09700cdb6b899e59b9a9771d5cd6f4ff7

  • SHA512

    da4efef37a8b66cd37073db159b8c31648501e58ba67c9a64d7c59d82828fb9649ed6d5317ca412a3c5e478f06982e319709128b314a1ab35a8a3cc5179a78b8

  • SSDEEP

    12288:li0YOwqgsH+MgpRYV9zNwA7NAY4zr/blj1GVyQ3s2wd0rTCbBUEBGl:YO7beMkOla3Rcl3yC2bBUE4

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.flying-fish-cn.com
  • Port:
    587
  • Username:
    office@flying-fish-cn.com
  • Password:
    hkk999@@@

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.flying-fish-cn.com
  • Port:
    587
  • Username:
    office@flying-fish-cn.com
  • Password:
    hkk999@@@
  • Email To:
    office@flying-fish-cn.com

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 11 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:2548
    • C:\Users\Admin\AppData\Local\Temp\CV Mariana Alvarez.exe
      "C:\Users\Admin\AppData\Local\Temp\CV Mariana Alvarez.exe"
      2⤵
        PID:2992
      • 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:1116

    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/1116-12-0x0000000000400000-0x0000000000440000-memory.dmp
      Filesize

      256KB

    • memory/1116-21-0x00000000032E0000-0x00000000032F0000-memory.dmp
      Filesize

      64KB

    • memory/1116-20-0x0000000075350000-0x0000000075B00000-memory.dmp
      Filesize

      7.7MB

    • memory/1116-19-0x0000000006E50000-0x0000000006EA0000-memory.dmp
      Filesize

      320KB

    • memory/1116-18-0x00000000032E0000-0x00000000032F0000-memory.dmp
      Filesize

      64KB

    • memory/1116-16-0x0000000005A50000-0x0000000005AB6000-memory.dmp
      Filesize

      408KB

    • memory/1116-15-0x0000000075350000-0x0000000075B00000-memory.dmp
      Filesize

      7.7MB

    • memory/2548-5-0x0000000005130000-0x000000000513A000-memory.dmp
      Filesize

      40KB

    • memory/2548-9-0x0000000007A80000-0x0000000007B1C000-memory.dmp
      Filesize

      624KB

    • memory/2548-10-0x0000000075350000-0x0000000075B00000-memory.dmp
      Filesize

      7.7MB

    • memory/2548-11-0x0000000005040000-0x0000000005050000-memory.dmp
      Filesize

      64KB

    • memory/2548-8-0x0000000006700000-0x0000000006782000-memory.dmp
      Filesize

      520KB

    • memory/2548-7-0x00000000062F0000-0x00000000062FC000-memory.dmp
      Filesize

      48KB

    • memory/2548-17-0x0000000075350000-0x0000000075B00000-memory.dmp
      Filesize

      7.7MB

    • memory/2548-6-0x00000000066E0000-0x00000000066FA000-memory.dmp
      Filesize

      104KB

    • memory/2548-1-0x0000000075350000-0x0000000075B00000-memory.dmp
      Filesize

      7.7MB

    • memory/2548-4-0x0000000005040000-0x0000000005050000-memory.dmp
      Filesize

      64KB

    • memory/2548-3-0x0000000005090000-0x0000000005122000-memory.dmp
      Filesize

      584KB

    • memory/2548-2-0x0000000005730000-0x0000000005CD4000-memory.dmp
      Filesize

      5.6MB

    • memory/2548-0-0x0000000000630000-0x00000000006DE000-memory.dmp
      Filesize

      696KB