Analysis

  • max time kernel
    169s
  • max time network
    184s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 00:27

General

  • Target

    qevRktR4diBlxL7.exe

  • Size

    611KB

  • MD5

    d95b072f6ee85a53e1e86f15cda3bfe7

  • SHA1

    986d1ec4a7c14cd1d5959e668dfc02d893b9e91a

  • SHA256

    5d7c6518979115ac71fbcf21c69c497357d150f5982ebd4c4e170f004091e5d6

  • SHA512

    e60078b725d6a4478ca9e2deb5cc40b37158ac63c9631766e0fe798c2363b8128de59e3c9b6e5d2227391a501de3a5a552cd1d93bfa9532ab6f1884ca16a4162

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.wolterfan.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    @Mar123

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • 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
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\qevRktR4diBlxL7.exe
    "C:\Users\Admin\AppData\Local\Temp\qevRktR4diBlxL7.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1732
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jraXuyS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEB1.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3140
    • C:\Users\Admin\AppData\Local\Temp\qevRktR4diBlxL7.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:3456
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:4364

    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

    Virtualization/Sandbox Evasion

    2
    T1497

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    Query Registry

    5
    T1012

    Virtualization/Sandbox Evasion

    2
    T1497

    System Information Discovery

    4
    T1082

    Peripheral Device Discovery

    1
    T1120

    Collection

    Data from Local System

    3
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\qevRktR4diBlxL7.exe.log
      Filesize

      1KB

      MD5

      e08f822522c617a40840c62e4b0fb45e

      SHA1

      ae516dca4da5234be6676d3f234c19ec55725be7

      SHA256

      bd9d5e9f7fe6fcff17d873555d4077d15f7d6cdda1183e7f7d278b735ffe1fd7

      SHA512

      894a7fb7bbc18ac6ba13378f58a7db80ad00d6080be9a66b01cae8e23e41d9d2d4cd53c1e20669356b73590c8a3ebfda4bdda3258f81240db56c4a81b7313fe4

    • C:\Users\Admin\AppData\Local\Temp\tmpEB1.tmp
      Filesize

      1KB

      MD5

      1a8affc0df6d980a1895dd3d3733014d

      SHA1

      8a8d8208246f9e7cedb13fbc6b73b1b7583896d9

      SHA256

      c1c925f2c7b6c98f11926e17c48e0986d2f5b7287d11b247dc46775afeabdff1

      SHA512

      391ec006b41b17f6a84f36936d2723712a4e0b642c2fb01635c1ee0b6cde580476a06d1f11889f6dd3883c6333331d3742c8e746bca7eda4a255f6f149abeea7

    • memory/1732-131-0x0000000005B90000-0x0000000006134000-memory.dmp
      Filesize

      5.6MB

    • memory/1732-132-0x0000000005510000-0x00000000055A2000-memory.dmp
      Filesize

      584KB

    • memory/1732-133-0x00000000055B0000-0x00000000055BA000-memory.dmp
      Filesize

      40KB

    • memory/1732-134-0x0000000008250000-0x00000000082EC000-memory.dmp
      Filesize

      624KB

    • memory/1732-135-0x00000000011F0000-0x0000000001256000-memory.dmp
      Filesize

      408KB

    • memory/1732-130-0x0000000000AE0000-0x0000000000B80000-memory.dmp
      Filesize

      640KB

    • memory/3140-136-0x0000000000000000-mapping.dmp
    • memory/3456-139-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/3456-138-0x0000000000000000-mapping.dmp
    • memory/3456-141-0x00000000069E0000-0x0000000006A30000-memory.dmp
      Filesize

      320KB

    • memory/4364-142-0x0000000000000000-mapping.dmp