Analysis

  • max time kernel
    140s
  • max time network
    161s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 09:16

General

  • Target

    PO-2100193237.xls

  • Size

    145KB

  • MD5

    75f03b0cdd937e55de5cb442cf32d995

  • SHA1

    6adaca4eff6ac6b02447fed5edc8ece74dc5ced0

  • SHA256

    294739cff953bbd4cb90ba91ffc7faf7c169875818c54d5379de317faec5317f

  • SHA512

    142e57ff5f7503cf18bd7756bf222478fb47c1bec71eb01e24d0ec996b0fd82f4e8f9315d445b91c492a5078134a0b028d9a16f3f659331d7bd8c20430b9ae60

  • SSDEEP

    3072:5XI8BEE2VI8wnSDMidLUiD7oB4YxM+kPB0Enr+K1ciO:5Xf4V2nhWL9DoxMBqqr+sciO

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    host39.registrar-servers.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    payment12345

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
  • 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 1 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\PO-2100193237.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1272
  • 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:268
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1204
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "{path}"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:864

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

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

    590KB

    MD5

    f6a159ce38c4f10ffc73685f38ae02e7

    SHA1

    af71f633197d8e560fdf10366e1257f3e7cbf174

    SHA256

    aaf8ed048165e8451ba35bbc87acb547a6ac54263de44f85137ff07470a2ff22

    SHA512

    60e400e399ea6d6cf314a18475660fdad846a33cbb0e24aa4278b0f09d032d4cb821f8e9207f238ddaa15dc92997f078983d86478488eae57c2eb77ecc4acc50

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

    590KB

    MD5

    f6a159ce38c4f10ffc73685f38ae02e7

    SHA1

    af71f633197d8e560fdf10366e1257f3e7cbf174

    SHA256

    aaf8ed048165e8451ba35bbc87acb547a6ac54263de44f85137ff07470a2ff22

    SHA512

    60e400e399ea6d6cf314a18475660fdad846a33cbb0e24aa4278b0f09d032d4cb821f8e9207f238ddaa15dc92997f078983d86478488eae57c2eb77ecc4acc50

  • \Users\Public\vbc.exe
    Filesize

    590KB

    MD5

    f6a159ce38c4f10ffc73685f38ae02e7

    SHA1

    af71f633197d8e560fdf10366e1257f3e7cbf174

    SHA256

    aaf8ed048165e8451ba35bbc87acb547a6ac54263de44f85137ff07470a2ff22

    SHA512

    60e400e399ea6d6cf314a18475660fdad846a33cbb0e24aa4278b0f09d032d4cb821f8e9207f238ddaa15dc92997f078983d86478488eae57c2eb77ecc4acc50

  • memory/864-73-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/864-69-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/864-77-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/864-79-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/864-75-0x0000000000437C6E-mapping.dmp
  • memory/864-74-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/864-72-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/864-70-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1204-68-0x0000000000BD0000-0x0000000000C0C000-memory.dmp
    Filesize

    240KB

  • memory/1204-67-0x0000000005CA0000-0x0000000005D24000-memory.dmp
    Filesize

    528KB

  • memory/1204-66-0x0000000000680000-0x0000000000692000-memory.dmp
    Filesize

    72KB

  • memory/1204-64-0x00000000012F0000-0x000000000138A000-memory.dmp
    Filesize

    616KB

  • memory/1204-61-0x0000000000000000-mapping.dmp
  • memory/1272-58-0x0000000074C41000-0x0000000074C43000-memory.dmp
    Filesize

    8KB

  • memory/1272-54-0x000000002F381000-0x000000002F384000-memory.dmp
    Filesize

    12KB

  • memory/1272-55-0x0000000071051000-0x0000000071053000-memory.dmp
    Filesize

    8KB

  • memory/1272-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1272-57-0x000000007203D000-0x0000000072048000-memory.dmp
    Filesize

    44KB

  • memory/1272-81-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1272-82-0x000000007203D000-0x0000000072048000-memory.dmp
    Filesize

    44KB