Analysis

  • max time kernel
    102s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    03-04-2023 11:24

General

  • Target

    ABSXInvoiceX44XMondail.xls

  • Size

    204KB

  • MD5

    4fb4c8ababf72ddf5d1f0d062bab366b

  • SHA1

    87d9502a787ead76800eccecba7e50a8bb84876f

  • SHA256

    67b636e506316c91b7dac8f11a003b70e68a981fbaef6bb44e640eb671d5bac9

  • SHA512

    5c7d25442a59e4273837e26baae097174e4c53a3cd0633f1da14f4b5a8d2f5d794f7854cf1d277108c96c5fabbb19155d115f2e8080c0ca6eb4181dff54ff4c7

  • SSDEEP

    6144:OZ+RwPONXoRjDhIcp0fDlavx+W26nASzF0kNeR0J:cWkF

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates system info in registry 2 TTPs 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 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\ABSXInvoiceX44XMondail.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1384
  • 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:1164
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:956
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "{path}"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1564

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Public\vbc.exe
    Filesize

    1.0MB

    MD5

    3573cfa28e62b14b3a8189063065c8bc

    SHA1

    16880f808ff4cbf50575f2cdba5ed4d2d13ef517

    SHA256

    3678eacb8a54a9b0112aae9c691b5ddbbe86631d17689abd544a1acac76c1ce8

    SHA512

    e7bafc37a0b52259de077ed2722acc363e354846163e5f39a8719b3df703f72ef4a702b83c92c4cf212c396c0c4128a40382cfbba75a58b8a886bff42b57d8b2

  • C:\Users\Public\vbc.exe
    Filesize

    1.0MB

    MD5

    3573cfa28e62b14b3a8189063065c8bc

    SHA1

    16880f808ff4cbf50575f2cdba5ed4d2d13ef517

    SHA256

    3678eacb8a54a9b0112aae9c691b5ddbbe86631d17689abd544a1acac76c1ce8

    SHA512

    e7bafc37a0b52259de077ed2722acc363e354846163e5f39a8719b3df703f72ef4a702b83c92c4cf212c396c0c4128a40382cfbba75a58b8a886bff42b57d8b2

  • C:\Users\Public\vbc.exe
    Filesize

    1.0MB

    MD5

    3573cfa28e62b14b3a8189063065c8bc

    SHA1

    16880f808ff4cbf50575f2cdba5ed4d2d13ef517

    SHA256

    3678eacb8a54a9b0112aae9c691b5ddbbe86631d17689abd544a1acac76c1ce8

    SHA512

    e7bafc37a0b52259de077ed2722acc363e354846163e5f39a8719b3df703f72ef4a702b83c92c4cf212c396c0c4128a40382cfbba75a58b8a886bff42b57d8b2

  • \Users\Public\vbc.exe
    Filesize

    1.0MB

    MD5

    3573cfa28e62b14b3a8189063065c8bc

    SHA1

    16880f808ff4cbf50575f2cdba5ed4d2d13ef517

    SHA256

    3678eacb8a54a9b0112aae9c691b5ddbbe86631d17689abd544a1acac76c1ce8

    SHA512

    e7bafc37a0b52259de077ed2722acc363e354846163e5f39a8719b3df703f72ef4a702b83c92c4cf212c396c0c4128a40382cfbba75a58b8a886bff42b57d8b2

  • \Users\Public\vbc.exe
    Filesize

    1.0MB

    MD5

    3573cfa28e62b14b3a8189063065c8bc

    SHA1

    16880f808ff4cbf50575f2cdba5ed4d2d13ef517

    SHA256

    3678eacb8a54a9b0112aae9c691b5ddbbe86631d17689abd544a1acac76c1ce8

    SHA512

    e7bafc37a0b52259de077ed2722acc363e354846163e5f39a8719b3df703f72ef4a702b83c92c4cf212c396c0c4128a40382cfbba75a58b8a886bff42b57d8b2

  • memory/956-72-0x00000000055A0000-0x000000000561C000-memory.dmp
    Filesize

    496KB

  • memory/956-68-0x0000000000D30000-0x0000000000E3C000-memory.dmp
    Filesize

    1.0MB

  • memory/956-69-0x00000000048E0000-0x0000000004920000-memory.dmp
    Filesize

    256KB

  • memory/956-70-0x0000000000420000-0x000000000042C000-memory.dmp
    Filesize

    48KB

  • memory/956-71-0x00000000048E0000-0x0000000004920000-memory.dmp
    Filesize

    256KB

  • memory/956-73-0x0000000000720000-0x0000000000750000-memory.dmp
    Filesize

    192KB

  • memory/1384-54-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1384-103-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1564-76-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1564-75-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1564-78-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/1564-77-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1564-79-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1564-81-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1564-83-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB

  • memory/1564-84-0x0000000000610000-0x0000000000650000-memory.dmp
    Filesize

    256KB

  • memory/1564-102-0x0000000000610000-0x0000000000650000-memory.dmp
    Filesize

    256KB

  • memory/1564-74-0x0000000000400000-0x0000000000430000-memory.dmp
    Filesize

    192KB