Analysis

  • max time kernel
    167s
  • max time network
    112s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    07-12-2022 10:28

General

  • Target

    SecuriteInfo.com.Other.Malware-gen.5152.3583.xls

  • Size

    288KB

  • MD5

    c331493a8114f141e781d1e6ef313d8b

  • SHA1

    40efd1edbb958610037ac48bfea8efe1b42fb572

  • SHA256

    a2ba99d5d1fb282868cb3598dc25221aa4e14db381bfd0288be19ac452ca58fe

  • SHA512

    8c14ff3c9cc20ad57eccf7e739439355eede324d59528fa50145a9f0aa957143044f1954185d60b5439ace8b0dbe979508041b10b2563b97fe27e515c8e1d629

  • SSDEEP

    6144:1k/iZ+RwPONXoRjDhIcp0fDlavx+W26nAUrxOFJkWraDUff4xpqsCou28n2cxfj8:1KsOFiWrN4xRk2awT

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    host39.registrar-servers.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    payment 12345

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 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • 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 use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 13 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\SecuriteInfo.com.Other.Malware-gen.5152.3583.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1112
  • 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:656
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Users\Public\vbc.exe
        "{path}"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:812

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

    920KB

    MD5

    67cc5f609549fbca275269568c215730

    SHA1

    663f019ffed0b4db915b1576530f801a5d9c6abb

    SHA256

    2d4cfa53a85fe7078163331cdf1577d6103cd7fb8a9c2f498ee2542bbc7f7d18

    SHA512

    5494129e88a07dbcdef76fe7c039ad7f7e8eeaab60987ce226359fa45aed391be0bb62b37b69a1fe025a78fabbd3db3468eb24363ced19ef1b3b4db98e75e855

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

    920KB

    MD5

    67cc5f609549fbca275269568c215730

    SHA1

    663f019ffed0b4db915b1576530f801a5d9c6abb

    SHA256

    2d4cfa53a85fe7078163331cdf1577d6103cd7fb8a9c2f498ee2542bbc7f7d18

    SHA512

    5494129e88a07dbcdef76fe7c039ad7f7e8eeaab60987ce226359fa45aed391be0bb62b37b69a1fe025a78fabbd3db3468eb24363ced19ef1b3b4db98e75e855

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

    920KB

    MD5

    67cc5f609549fbca275269568c215730

    SHA1

    663f019ffed0b4db915b1576530f801a5d9c6abb

    SHA256

    2d4cfa53a85fe7078163331cdf1577d6103cd7fb8a9c2f498ee2542bbc7f7d18

    SHA512

    5494129e88a07dbcdef76fe7c039ad7f7e8eeaab60987ce226359fa45aed391be0bb62b37b69a1fe025a78fabbd3db3468eb24363ced19ef1b3b4db98e75e855

  • \Users\Public\vbc.exe
    Filesize

    920KB

    MD5

    67cc5f609549fbca275269568c215730

    SHA1

    663f019ffed0b4db915b1576530f801a5d9c6abb

    SHA256

    2d4cfa53a85fe7078163331cdf1577d6103cd7fb8a9c2f498ee2542bbc7f7d18

    SHA512

    5494129e88a07dbcdef76fe7c039ad7f7e8eeaab60987ce226359fa45aed391be0bb62b37b69a1fe025a78fabbd3db3468eb24363ced19ef1b3b4db98e75e855

  • memory/812-80-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-70-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-74-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-73-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-72-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-69-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-78-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/812-75-0x0000000000437C8E-mapping.dmp
  • memory/1112-82-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1112-83-0x0000000072AAD000-0x0000000072AB8000-memory.dmp
    Filesize

    44KB

  • memory/1112-58-0x00000000760D1000-0x00000000760D3000-memory.dmp
    Filesize

    8KB

  • memory/1112-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1112-57-0x0000000072AAD000-0x0000000072AB8000-memory.dmp
    Filesize

    44KB

  • memory/1112-54-0x000000002FF21000-0x000000002FF24000-memory.dmp
    Filesize

    12KB

  • memory/1112-55-0x0000000071AC1000-0x0000000071AC3000-memory.dmp
    Filesize

    8KB

  • memory/1568-61-0x0000000000000000-mapping.dmp
  • memory/1568-68-0x00000000005E0000-0x000000000063C000-memory.dmp
    Filesize

    368KB

  • memory/1568-67-0x0000000005270000-0x000000000530C000-memory.dmp
    Filesize

    624KB

  • memory/1568-66-0x00000000002B0000-0x00000000002C2000-memory.dmp
    Filesize

    72KB

  • memory/1568-64-0x0000000000130000-0x000000000021C000-memory.dmp
    Filesize

    944KB