Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-03-2024 01:13

General

  • Target

    b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48.exe

  • Size

    745KB

  • MD5

    612b4992d513cfff18282f683e73ecf9

  • SHA1

    f1470207b5e07d501ad383286ae4aec9d7b5bb58

  • SHA256

    b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48

  • SHA512

    a1c3c8a03ca951000c88d92a4f00959e2f8237ae55212d1a26fcbfd23ce2149ec78c5b98ef7f9e322f8e6648b3831fc1177aec6b4495462b1198dc62e690313b

  • SSDEEP

    12288:vdYU27LK1OLD8U0FUAY4sm2oIGZ9mbFg67KfI5z79N26L1egXMVEIP5+YEwN2:v6U27iOLASdLm2oIWmbF/J5v9gwD

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    pro51.emailserver.vn
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    O{AG(tbFk2.Y

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 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48.exe
    "C:\Users\Admin\AppData\Local\Temp\b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3140
    • C:\Users\Admin\AppData\Local\Temp\b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48.exe
      "C:\Users\Admin\AppData\Local\Temp\b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1596
  • 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=3392 --field-trial-handle=2148,i,1752153415760610784,11376271161549019716,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:5040

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\b57cef37484d6731aef9ca1156ad7ebbdda16fedf4c96fd1b8371530582f5d48.exe.log

      Filesize

      1KB

      MD5

      8ec831f3e3a3f77e4a7b9cd32b48384c

      SHA1

      d83f09fd87c5bd86e045873c231c14836e76a05c

      SHA256

      7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

      SHA512

      26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

    • memory/1596-10-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/1596-19-0x0000000005310000-0x0000000005320000-memory.dmp

      Filesize

      64KB

    • memory/1596-18-0x0000000074440000-0x0000000074BF0000-memory.dmp

      Filesize

      7.7MB

    • memory/1596-16-0x0000000006B00000-0x0000000006B50000-memory.dmp

      Filesize

      320KB

    • memory/1596-15-0x0000000005390000-0x00000000053F6000-memory.dmp

      Filesize

      408KB

    • memory/1596-14-0x0000000005310000-0x0000000005320000-memory.dmp

      Filesize

      64KB

    • memory/1596-13-0x0000000074440000-0x0000000074BF0000-memory.dmp

      Filesize

      7.7MB

    • memory/3140-4-0x0000000007640000-0x0000000007650000-memory.dmp

      Filesize

      64KB

    • memory/3140-9-0x00000000060B0000-0x000000000614C000-memory.dmp

      Filesize

      624KB

    • memory/3140-8-0x0000000008A40000-0x0000000008AC4000-memory.dmp

      Filesize

      528KB

    • memory/3140-7-0x00000000078A0000-0x00000000078AC000-memory.dmp

      Filesize

      48KB

    • memory/3140-6-0x0000000007880000-0x000000000789A000-memory.dmp

      Filesize

      104KB

    • memory/3140-5-0x0000000007570000-0x000000000757A000-memory.dmp

      Filesize

      40KB

    • memory/3140-0-0x0000000074440000-0x0000000074BF0000-memory.dmp

      Filesize

      7.7MB

    • memory/3140-3-0x00000000073E0000-0x0000000007472000-memory.dmp

      Filesize

      584KB

    • memory/3140-17-0x0000000074440000-0x0000000074BF0000-memory.dmp

      Filesize

      7.7MB

    • memory/3140-2-0x00000000078B0000-0x0000000007E54000-memory.dmp

      Filesize

      5.6MB

    • memory/3140-1-0x0000000000450000-0x0000000000510000-memory.dmp

      Filesize

      768KB