Analysis

  • max time kernel
    134s
  • max time network
    112s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    27-07-2021 13:05

General

  • Target

    Purchase - Order.exe

  • Size

    491KB

  • MD5

    c25db03537a94168fe05f968720c735a

  • SHA1

    bdf8b7786bdd448a689e06347895ca8dbddab79c

  • SHA256

    3a94befc248570bf58be57f7b0e146985221219aefed7e437ddf865711b7c069

  • SHA512

    26f27f98183de9f87807add66919fbeabf1e6373dfd98360348860f551f3292deb347560cd2ac0fe7372424374d5f1b8a8add9d92739bca32e725374bb974241

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.zakhourco.com
  • Port:
    587
  • Username:
    mira.kassar@zakhourco.com
  • Password:
    #Za$out%12

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 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.

  • 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.

  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3200
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wzqcOpgNYsw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCD68.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:8
    • C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
      "{path}"
      2⤵
        PID:3988
      • C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
        "{path}"
        2⤵
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1396

    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

    4
    T1012

    Virtualization/Sandbox Evasion

    2
    T1497

    System Information Discovery

    3
    T1082

    Peripheral Device Discovery

    1
    T1120

    Collection

    Data from Local System

    3
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Purchase - Order.exe.log
      MD5

      12557ab909651a6f99d3503d614d3562

      SHA1

      b86745768059a514bea3a438e1e96086af463246

      SHA256

      9589c869703e95d40d5870c60f66d8460f7914e9fe8dd579533c84148112babd

      SHA512

      10cdb2fa7cf054af937b4aeddfe16fe755d6b09db5a51f7052adbf472b4b435e16c141f3712762f3b67f990c3efcfa47659576988e321214c747d6cd98e75521

    • C:\Users\Admin\AppData\Local\Temp\tmpCD68.tmp
      MD5

      4a8139317affb783aaa122cf0b660878

      SHA1

      3d431a4bc0d3c9481e995d7c666b957e84cb1cf9

      SHA256

      b4f3bae01de0a360aab32f101c59a9f17693a38b6c6853b9cc782f5a9de1fa7c

      SHA512

      df8e0f4c4c97ec4fbf9585f7cd023c3129e62092260f7a48845717e2fd5291b09269edbc6b1ce117f65cbe3ec4d15e382efc8835991ebc8103f293cf0aecaa90

    • memory/8-125-0x0000000000000000-mapping.dmp
    • memory/1396-135-0x00000000062A0000-0x00000000062A1000-memory.dmp
      Filesize

      4KB

    • memory/1396-134-0x00000000056B0000-0x0000000005BAE000-memory.dmp
      Filesize

      5.0MB

    • memory/1396-128-0x000000000043784E-mapping.dmp
    • memory/1396-127-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/3200-119-0x0000000004A20000-0x0000000004F1E000-memory.dmp
      Filesize

      5.0MB

    • memory/3200-123-0x0000000008390000-0x00000000083CD000-memory.dmp
      Filesize

      244KB

    • memory/3200-124-0x000000000DBE0000-0x000000000DBE1000-memory.dmp
      Filesize

      4KB

    • memory/3200-122-0x0000000008410000-0x0000000008492000-memory.dmp
      Filesize

      520KB

    • memory/3200-121-0x0000000007FF0000-0x0000000007FF1000-memory.dmp
      Filesize

      4KB

    • memory/3200-120-0x0000000004F10000-0x0000000004F12000-memory.dmp
      Filesize

      8KB

    • memory/3200-114-0x0000000000260000-0x0000000000261000-memory.dmp
      Filesize

      4KB

    • memory/3200-118-0x0000000004C80000-0x0000000004C81000-memory.dmp
      Filesize

      4KB

    • memory/3200-117-0x0000000004B10000-0x0000000004B11000-memory.dmp
      Filesize

      4KB

    • memory/3200-116-0x0000000004F20000-0x0000000004F21000-memory.dmp
      Filesize

      4KB