Analysis

  • max time kernel
    97s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 00:59

General

  • Target

    Swift_098845.exe

  • Size

    445KB

  • MD5

    233b33cb478e8e8d1a75543f039024b8

  • SHA1

    8d72b67ea52e0927d03d00d168bd8065fd5211c2

  • SHA256

    dfca8cf09994229afec678b5c279d247e3e69c45f2878f816025b4933f3bc3b0

  • SHA512

    c2acf510e40a9efefdc7c6ca1bf8574258c343adda592412c97946c33bcd02541a82bd682253e7d348ffe2ac7254c2db01d37c07609f354068fa8608e711d95e

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ImSCJnu6

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ImSCJnu6

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • 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 4 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Swift_098845.exe
    "C:\Users\Admin\AppData\Local\Temp\Swift_098845.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3764
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AlgdnhUnFZq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2124.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3812
    • C:\Users\Admin\AppData\Local\Temp\Swift_098845.exe
      "{path}"
      2⤵
        PID:632
      • C:\Users\Admin\AppData\Local\Temp\Swift_098845.exe
        "{path}"
        2⤵
        • Accesses Microsoft Outlook profiles
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: RenamesItself
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:392
        • C:\Windows\SysWOW64\netsh.exe
          "netsh" wlan show profile
          3⤵
            PID:444

      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

      Credential Access

      Credentials in Files

      3
      T1081

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Collection

      Data from Local System

      3
      T1005

      Email Collection

      1
      T1114

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\Swift_098845.exe.log
        Filesize

        496B

        MD5

        cb76b18ebed3a9f05a14aed43d35fba6

        SHA1

        836a4b4e351846fca08b84149cb734cb59b8c0d6

        SHA256

        8d0edecf54cbbdf7981c8e41a3ed8621503188a87415f9af0fb8d890b138c349

        SHA512

        7631141e4a6dda29452ada666326837372cd3d045f773006f63d9eff15d9432ed00029d9108a72c1a3b858377600a2aab2c9ec03764285c8801b6019babcf21c

      • C:\Users\Admin\AppData\Local\Temp\tmp2124.tmp
        Filesize

        1KB

        MD5

        dc03e582f4dd56134b7dbf0baaddbe72

        SHA1

        1c883c1b1784c8fd7c19d58925853e07c3099d27

        SHA256

        7d863fe7e5a14fa492484e6187fc65be23b3418fb62a78c2c29331ed875930df

        SHA512

        b22059aab0af7f4b2d57d3408c15a92a0d40592ec1f747900e7bab7ac3e489c396fd3af66e7f8b5876f926d2a1c49f4f0efed8688ecf0b10da12c4acff06a6f1

      • memory/392-134-0x0000000000000000-mapping.dmp
      • memory/392-135-0x0000000000400000-0x0000000000452000-memory.dmp
        Filesize

        328KB

      • memory/392-137-0x0000000074690000-0x0000000074C41000-memory.dmp
        Filesize

        5.7MB

      • memory/444-138-0x0000000000000000-mapping.dmp
      • memory/632-133-0x0000000000000000-mapping.dmp
      • memory/3764-130-0x0000000074690000-0x0000000074C41000-memory.dmp
        Filesize

        5.7MB

      • memory/3812-131-0x0000000000000000-mapping.dmp