Analysis

  • max time kernel
    112s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    19-04-2021 18:51

General

  • Target

    payment receipt.doc

  • Size

    566KB

  • MD5

    62a7b3f94fccff2290554183030a7295

  • SHA1

    2ecc1fcffe96a21bfdc33a30a1f79195f96b3cf8

  • SHA256

    77ff0fe733a29458872bac397a3f6bf6a6abf878edcd7cdd21b4b7fc396ec56e

  • SHA512

    ef6608e72b01c272665245367d22258980f173e3bd70b9a8a7a1f21a59a88aaa0380845d3615f2bb41cd0667c457d201c17d88f00f5c265b1cade0059c3f1427

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.orienttech.com.qa
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Op{^fLb9gN[!

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • 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
  • Suspicious use of NtSetInformationThreadHideFromDebugger 14 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Office loads VBA resources, possible macro or embedded object present
  • Delays execution with timeout.exe 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\payment receipt.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1028
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1848
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1856
      • C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe
        "C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1292
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1592
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            4⤵
            • Delays execution with timeout.exe
            PID:1328
        • C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe
          "C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1412

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Exploitation for Client Execution

    1
    T1203

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    3
    T1112

    Install Root Certificate

    1
    T1130

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe
      MD5

      0389d0b86a7342d646fc52945033e0c3

      SHA1

      6d1fa84447923f045673c8510269cc8679332322

      SHA256

      2a39871fcfc1b15b312efc820839f57a21288c09be793ca1ddaf41d821ce3c01

      SHA512

      5575d21a2a44d1b56fee70bade21c5e9bf0bab620afacc660f02c7f3980af538bb7164c1a845db47010b3e66adb51d9e03aa9f469b638d580e42e5cc371b6208

    • C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe
      MD5

      0389d0b86a7342d646fc52945033e0c3

      SHA1

      6d1fa84447923f045673c8510269cc8679332322

      SHA256

      2a39871fcfc1b15b312efc820839f57a21288c09be793ca1ddaf41d821ce3c01

      SHA512

      5575d21a2a44d1b56fee70bade21c5e9bf0bab620afacc660f02c7f3980af538bb7164c1a845db47010b3e66adb51d9e03aa9f469b638d580e42e5cc371b6208

    • C:\Users\Admin\AppData\Roaming\ellawealtho368398.exe
      MD5

      0389d0b86a7342d646fc52945033e0c3

      SHA1

      6d1fa84447923f045673c8510269cc8679332322

      SHA256

      2a39871fcfc1b15b312efc820839f57a21288c09be793ca1ddaf41d821ce3c01

      SHA512

      5575d21a2a44d1b56fee70bade21c5e9bf0bab620afacc660f02c7f3980af538bb7164c1a845db47010b3e66adb51d9e03aa9f469b638d580e42e5cc371b6208

    • \Users\Admin\AppData\Roaming\ellawealtho368398.exe
      MD5

      0389d0b86a7342d646fc52945033e0c3

      SHA1

      6d1fa84447923f045673c8510269cc8679332322

      SHA256

      2a39871fcfc1b15b312efc820839f57a21288c09be793ca1ddaf41d821ce3c01

      SHA512

      5575d21a2a44d1b56fee70bade21c5e9bf0bab620afacc660f02c7f3980af538bb7164c1a845db47010b3e66adb51d9e03aa9f469b638d580e42e5cc371b6208

    • memory/1028-61-0x0000000070141000-0x0000000070143000-memory.dmp
      Filesize

      8KB

    • memory/1028-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1028-83-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1028-60-0x00000000726C1000-0x00000000726C4000-memory.dmp
      Filesize

      12KB

    • memory/1292-65-0x0000000000000000-mapping.dmp
    • memory/1292-71-0x0000000004720000-0x0000000004721000-memory.dmp
      Filesize

      4KB

    • memory/1292-72-0x0000000000180000-0x00000000001D4000-memory.dmp
      Filesize

      336KB

    • memory/1292-68-0x0000000000930000-0x0000000000931000-memory.dmp
      Filesize

      4KB

    • memory/1328-74-0x0000000000000000-mapping.dmp
    • memory/1412-75-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1412-76-0x00000000004374DE-mapping.dmp
    • memory/1412-78-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1412-80-0x0000000004750000-0x0000000004751000-memory.dmp
      Filesize

      4KB

    • memory/1412-84-0x0000000004751000-0x0000000004752000-memory.dmp
      Filesize

      4KB

    • memory/1592-73-0x0000000000000000-mapping.dmp
    • memory/1848-81-0x0000000000000000-mapping.dmp
    • memory/1848-82-0x000007FEFBD61000-0x000007FEFBD63000-memory.dmp
      Filesize

      8KB

    • memory/1856-63-0x0000000075801000-0x0000000075803000-memory.dmp
      Filesize

      8KB