Analysis

  • max time kernel
    122s
  • max time network
    78s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    15-09-2021 07:08

General

  • Target

    SHIPPING DOCUMENT.xlsx

  • Size

    587KB

  • MD5

    8d888bf7f0fbf737dcb6f62f58d9c00e

  • SHA1

    5d8acca52c259e714e4e28a9e6ea3a36f5eb108f

  • SHA256

    3368451d206d750382c2ff4c823c3a0f95952e2ce86e7fdde7b4c3e1d4d5c75b

  • SHA512

    ec7e95b51f72ac8182859edffe4ea68ea18d2e6c93df5ab9d850fdb63d3494fdf6eabe75c30a1ff07a5df5f99cc9eb076691fbfb70a0d84f0a16a57c9e05ab96

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.ccsp-india.com
  • Port:
    587
  • Username:
    jayamurugan@ccsp-india.com
  • Password:
    Lkp$CcsP1008

Signatures

  • AgentTesla

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

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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 9 IoCs
  • Modifies system certificate store 2 TTPs 2 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

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\SHIPPING DOCUMENT.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1984
  • 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:568
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1164
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1664

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

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Public\vbc.exe
    MD5

    6081ce5670ccefa83d80c014be81c3b1

    SHA1

    1951b5cfe05cd518f24fc853c80fccc841a18bdd

    SHA256

    8bd37ec94a72399af42c7daa01e5d9f7b50fb2fecab3883d1db28298a2cfa705

    SHA512

    f6374b00e5c95384ca36d22a0946f327125f351415eb976d7047d5ba29e618233445c0de0de265eeacfb84077b8c48b76ef8bc0ab55026ea3b5eca35f29f5386

  • C:\Users\Public\vbc.exe
    MD5

    6081ce5670ccefa83d80c014be81c3b1

    SHA1

    1951b5cfe05cd518f24fc853c80fccc841a18bdd

    SHA256

    8bd37ec94a72399af42c7daa01e5d9f7b50fb2fecab3883d1db28298a2cfa705

    SHA512

    f6374b00e5c95384ca36d22a0946f327125f351415eb976d7047d5ba29e618233445c0de0de265eeacfb84077b8c48b76ef8bc0ab55026ea3b5eca35f29f5386

  • \Users\Admin\AppData\Local\Temp\InstallUtil.exe
    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • \Users\Public\vbc.exe
    MD5

    6081ce5670ccefa83d80c014be81c3b1

    SHA1

    1951b5cfe05cd518f24fc853c80fccc841a18bdd

    SHA256

    8bd37ec94a72399af42c7daa01e5d9f7b50fb2fecab3883d1db28298a2cfa705

    SHA512

    f6374b00e5c95384ca36d22a0946f327125f351415eb976d7047d5ba29e618233445c0de0de265eeacfb84077b8c48b76ef8bc0ab55026ea3b5eca35f29f5386

  • \Users\Public\vbc.exe
    MD5

    6081ce5670ccefa83d80c014be81c3b1

    SHA1

    1951b5cfe05cd518f24fc853c80fccc841a18bdd

    SHA256

    8bd37ec94a72399af42c7daa01e5d9f7b50fb2fecab3883d1db28298a2cfa705

    SHA512

    f6374b00e5c95384ca36d22a0946f327125f351415eb976d7047d5ba29e618233445c0de0de265eeacfb84077b8c48b76ef8bc0ab55026ea3b5eca35f29f5386

  • \Users\Public\vbc.exe
    MD5

    6081ce5670ccefa83d80c014be81c3b1

    SHA1

    1951b5cfe05cd518f24fc853c80fccc841a18bdd

    SHA256

    8bd37ec94a72399af42c7daa01e5d9f7b50fb2fecab3883d1db28298a2cfa705

    SHA512

    f6374b00e5c95384ca36d22a0946f327125f351415eb976d7047d5ba29e618233445c0de0de265eeacfb84077b8c48b76ef8bc0ab55026ea3b5eca35f29f5386

  • \Users\Public\vbc.exe
    MD5

    6081ce5670ccefa83d80c014be81c3b1

    SHA1

    1951b5cfe05cd518f24fc853c80fccc841a18bdd

    SHA256

    8bd37ec94a72399af42c7daa01e5d9f7b50fb2fecab3883d1db28298a2cfa705

    SHA512

    f6374b00e5c95384ca36d22a0946f327125f351415eb976d7047d5ba29e618233445c0de0de265eeacfb84077b8c48b76ef8bc0ab55026ea3b5eca35f29f5386

  • memory/568-62-0x00000000767B1000-0x00000000767B3000-memory.dmp
    Filesize

    8KB

  • memory/1164-77-0x0000000000290000-0x000000000029A000-memory.dmp
    Filesize

    40KB

  • memory/1164-67-0x0000000000000000-mapping.dmp
  • memory/1164-72-0x00000000004C0000-0x00000000004C1000-memory.dmp
    Filesize

    4KB

  • memory/1164-73-0x0000000000500000-0x0000000000524000-memory.dmp
    Filesize

    144KB

  • memory/1164-70-0x00000000003D0000-0x00000000003D1000-memory.dmp
    Filesize

    4KB

  • memory/1164-79-0x00000000004C1000-0x00000000004C2000-memory.dmp
    Filesize

    4KB

  • memory/1664-86-0x0000000000090000-0x00000000000CC000-memory.dmp
    Filesize

    240KB

  • memory/1664-81-0x000000000043766E-mapping.dmp
  • memory/1664-83-0x0000000000090000-0x00000000000CC000-memory.dmp
    Filesize

    240KB

  • memory/1664-88-0x0000000000090000-0x0000000000092000-memory.dmp
    Filesize

    8KB

  • memory/1664-90-0x0000000004B30000-0x0000000004B31000-memory.dmp
    Filesize

    4KB

  • memory/1664-92-0x0000000004B31000-0x0000000004B32000-memory.dmp
    Filesize

    4KB

  • memory/1984-59-0x000000002F151000-0x000000002F154000-memory.dmp
    Filesize

    12KB

  • memory/1984-76-0x0000000005D30000-0x000000000697A000-memory.dmp
    Filesize

    12.3MB

  • memory/1984-75-0x0000000005D30000-0x000000000697A000-memory.dmp
    Filesize

    12.3MB

  • memory/1984-61-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1984-74-0x0000000005D30000-0x000000000697A000-memory.dmp
    Filesize

    12.3MB

  • memory/1984-60-0x0000000071851000-0x0000000071853000-memory.dmp
    Filesize

    8KB

  • memory/1984-91-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB