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Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    01/02/2024, 08:44

General

  • Target

    PAYMENT SLIP.xlam

  • Size

    620KB

  • MD5

    1805ca0be03ee0029d70f078082ba3b2

  • SHA1

    db2c53dea18e2b1467167e20c28071eba6daae54

  • SHA256

    ea3c83e211fd21cc03f677d595ad020c7f477a7125dee8dcbcb0ea1feceab3d3

  • SHA512

    987d4bdc7200a86bfa0c35be80f4b3271679ab24b55782cb5512159cfa89d7fe9f107136985c9d658bb07502a45b584fef4e06a0303b05dd6e42c021903d5e49

  • SSDEEP

    12288:L2nWLnaUJsX7dk0nY8qMQgk+e0TqxP8/7G6Z83dnQEaDiwH:y5SmdxnhqkNeeqxPS7GbMJ

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 1 IoCs
  • 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.

  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • 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 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 12 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\PAYMENT SLIP.xlam"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2252
  • 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:1628
    • C:\Users\Admin\AppData\Roaming\UYS.exe
      "C:\Users\Admin\AppData\Roaming\UYS.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2804
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Users\Admin\AppData\Roaming\UYS.exe"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:2000

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Roaming\UYS.exe

    Filesize

    1.1MB

    MD5

    d21a36003f0f4d72eaa2d4961b3eca78

    SHA1

    27b169af7b7e4330db36734f23b8d1a09751e0ee

    SHA256

    a47ba5991ade84ef2d1e978995208bfe43bf3be9d7fc37fe24ff9ab87e9e6f22

    SHA512

    4eaee5b1172da710635ebeab21a4a325b6c9077677e470b0e552f14d9a6ac89c271acbf36951973269dd9e9597e24a5e85ba13e5a7463616124ace36b30d301d

  • memory/2000-25-0x0000000004A10000-0x0000000004A50000-memory.dmp

    Filesize

    256KB

  • memory/2000-28-0x0000000004A10000-0x0000000004A50000-memory.dmp

    Filesize

    256KB

  • memory/2000-27-0x000000006BDE0000-0x000000006C4CE000-memory.dmp

    Filesize

    6.9MB

  • memory/2000-19-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/2000-23-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/2000-21-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/2000-24-0x000000006BDE0000-0x000000006C4CE000-memory.dmp

    Filesize

    6.9MB

  • memory/2252-26-0x00000000722BD000-0x00000000722C8000-memory.dmp

    Filesize

    44KB

  • memory/2252-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/2252-1-0x00000000722BD000-0x00000000722C8000-memory.dmp

    Filesize

    44KB

  • memory/2252-30-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/2252-31-0x00000000722BD000-0x00000000722C8000-memory.dmp

    Filesize

    44KB

  • memory/2804-18-0x00000000000A0000-0x00000000000A4000-memory.dmp

    Filesize

    16KB