Analysis

  • max time kernel
    114s
  • max time network
    72s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21/09/2022, 18:04

General

  • Target

    ORDEN DE COMPRA 045190.xlsx

  • Size

    855KB

  • MD5

    66227586a6d1363e22d6e1c10876d5d3

  • SHA1

    a89986704684311eb3b1970e8fca4e497e51ce5b

  • SHA256

    f83628e8db4f7c65ed636e17a1ab69a2b0f14a7e1cf9afca77b682b6d51f8677

  • SHA512

    22bf3f739a72a48f887e8783f9b2345465f27b719736857b08badb1561d24b1d7863692160a4c20aea4ac383b2036fa0c27ad44ae87e8d01bac452e2acb78196

  • SSDEEP

    24576:9mvJDD0Kdb0i0e2zTGlaWAT89esUWb726Wl3z:9mZD0Pi0e2zaEW0cbod

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.gettoner.com.mx/
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    fedxunited543@

Signatures

  • AgentTesla

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

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • AgentTesla payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 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.

  • 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 FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 9 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\ORDEN DE COMPRA 045190.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:1836
  • 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:1216
    • C:\Users\Admin\AppData\Roaming\documentos executo.exe
      "C:\Users\Admin\AppData\Roaming\documentos executo.exe"
      2⤵
      • Executes dropped EXE
      • Checks QEMU agent file
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1344
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
        "C:\Users\Admin\AppData\Roaming\documentos executo.exe"
        3⤵
        • Checks QEMU agent file
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:848

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\documentos executo.exe

          Filesize

          365KB

          MD5

          f511695581325c3f6354a1baf25f516a

          SHA1

          b3f8496d59c3ec99c3c78efa83f649072f9c0595

          SHA256

          f0567df7d47a2ac8dfc565a88afcf6433e1f65a35cbe98594ce13b1089e536f4

          SHA512

          b5fe7872e4730892032c879f7567318e3826216d6678fc2e19e8982c73db22769918ea4f19f7eaef83539ac836cd9bd09cbe6d7660701af2af5d04e513962f16

        • C:\Users\Admin\AppData\Roaming\documentos executo.exe

          Filesize

          365KB

          MD5

          f511695581325c3f6354a1baf25f516a

          SHA1

          b3f8496d59c3ec99c3c78efa83f649072f9c0595

          SHA256

          f0567df7d47a2ac8dfc565a88afcf6433e1f65a35cbe98594ce13b1089e536f4

          SHA512

          b5fe7872e4730892032c879f7567318e3826216d6678fc2e19e8982c73db22769918ea4f19f7eaef83539ac836cd9bd09cbe6d7660701af2af5d04e513962f16

        • \Users\Admin\AppData\Local\Temp\nsd6192.tmp\System.dll

          Filesize

          12KB

          MD5

          637e1fa13012a78922b6e98efc0b12e2

          SHA1

          8012d44e42cd6d813ea63d5ccbf190fe72e3c778

          SHA256

          703e17d30a91775f8ddc2648b537fc846fad6415589a503a4529c36f60a17439

          SHA512

          932ed6a52e89c4fa587a7c0c3903d69cf89a32dbd46ed8dcb251abb6c15192d92b1f624c31f0e4bd3e9bf95fc1a55fdb7cee9dd668e1b4f22ddb95786c063e96

        • \Users\Admin\AppData\Roaming\documentos executo.exe

          Filesize

          365KB

          MD5

          f511695581325c3f6354a1baf25f516a

          SHA1

          b3f8496d59c3ec99c3c78efa83f649072f9c0595

          SHA256

          f0567df7d47a2ac8dfc565a88afcf6433e1f65a35cbe98594ce13b1089e536f4

          SHA512

          b5fe7872e4730892032c879f7567318e3826216d6678fc2e19e8982c73db22769918ea4f19f7eaef83539ac836cd9bd09cbe6d7660701af2af5d04e513962f16

        • memory/848-75-0x0000000000250000-0x0000000000350000-memory.dmp

          Filesize

          1024KB

        • memory/848-88-0x0000000076E20000-0x0000000076FC9000-memory.dmp

          Filesize

          1.7MB

        • memory/848-85-0x0000000000250000-0x0000000000350000-memory.dmp

          Filesize

          1024KB

        • memory/848-83-0x0000000000400000-0x000000000043C000-memory.dmp

          Filesize

          240KB

        • memory/848-81-0x0000000000401000-0x0000000000615000-memory.dmp

          Filesize

          2.1MB

        • memory/848-80-0x0000000000400000-0x0000000000615000-memory.dmp

          Filesize

          2.1MB

        • memory/848-79-0x0000000077000000-0x0000000077180000-memory.dmp

          Filesize

          1.5MB

        • memory/848-76-0x0000000076E20000-0x0000000076FC9000-memory.dmp

          Filesize

          1.7MB

        • memory/1344-67-0x0000000003B10000-0x0000000003C11000-memory.dmp

          Filesize

          1.0MB

        • memory/1344-87-0x0000000077000000-0x0000000077180000-memory.dmp

          Filesize

          1.5MB

        • memory/1344-74-0x0000000077000000-0x0000000077180000-memory.dmp

          Filesize

          1.5MB

        • memory/1344-73-0x0000000077000000-0x0000000077180000-memory.dmp

          Filesize

          1.5MB

        • memory/1344-69-0x0000000076E20000-0x0000000076FC9000-memory.dmp

          Filesize

          1.7MB

        • memory/1344-68-0x0000000003B10000-0x0000000003C11000-memory.dmp

          Filesize

          1.0MB

        • memory/1344-86-0x0000000003B10000-0x0000000003C11000-memory.dmp

          Filesize

          1.0MB

        • memory/1344-84-0x0000000077000000-0x0000000077180000-memory.dmp

          Filesize

          1.5MB

        • memory/1836-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

          Filesize

          64KB

        • memory/1836-65-0x0000000071CDD000-0x0000000071CE8000-memory.dmp

          Filesize

          44KB

        • memory/1836-57-0x0000000071CDD000-0x0000000071CE8000-memory.dmp

          Filesize

          44KB

        • memory/1836-55-0x0000000070CF1000-0x0000000070CF3000-memory.dmp

          Filesize

          8KB

        • memory/1836-54-0x000000002FAA1000-0x000000002FAA4000-memory.dmp

          Filesize

          12KB

        • memory/1836-58-0x0000000075771000-0x0000000075773000-memory.dmp

          Filesize

          8KB

        • memory/1836-89-0x000000005FFF0000-0x0000000060000000-memory.dmp

          Filesize

          64KB

        • memory/1836-90-0x0000000071CDD000-0x0000000071CE8000-memory.dmp

          Filesize

          44KB