Analysis

  • max time kernel
    133s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    19-10-2021 13:59

General

  • Target

    NEW ORDER AST 27-28 October.xlsx

  • Size

    369KB

  • MD5

    7ab0bc5ab895f38b4ad85e904a321080

  • SHA1

    9a017dc60dfa0c9129f6d5742cfda057b3e99f3a

  • SHA256

    35056762755603176fdd69583d03f154c6b5a7dbac3ae758b9a1d4cd04ff4e32

  • SHA512

    95343201aefdd0940c3779ff568604f2257ba2d0414525ab9ed3f0be85674c004a4bd63795c24db4eb74cfc5068143e3032efba2ccdaab2ac9ee1679098e0427

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.xxltrucck.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    vFguU*i0

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 5 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • 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
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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\NEW ORDER AST 27-28 October.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1224
  • 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:472
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1628
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1552

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

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

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

    41c7bfc7333edd0ad3ede2cc7ef23ebe

    SHA1

    880b1892d082178a113b6af32d81339c0255d634

    SHA256

    816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

    SHA512

    f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

  • C:\Users\Public\vbc.exe
    MD5

    41c7bfc7333edd0ad3ede2cc7ef23ebe

    SHA1

    880b1892d082178a113b6af32d81339c0255d634

    SHA256

    816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

    SHA512

    f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

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

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • \Users\Public\vbc.exe
    MD5

    41c7bfc7333edd0ad3ede2cc7ef23ebe

    SHA1

    880b1892d082178a113b6af32d81339c0255d634

    SHA256

    816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

    SHA512

    f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

  • \Users\Public\vbc.exe
    MD5

    41c7bfc7333edd0ad3ede2cc7ef23ebe

    SHA1

    880b1892d082178a113b6af32d81339c0255d634

    SHA256

    816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

    SHA512

    f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

  • memory/472-56-0x00000000767F1000-0x00000000767F3000-memory.dmp
    Filesize

    8KB

  • memory/1224-81-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1224-53-0x000000002F701000-0x000000002F704000-memory.dmp
    Filesize

    12KB

  • memory/1224-55-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1224-54-0x0000000071AB1000-0x0000000071AB3000-memory.dmp
    Filesize

    8KB

  • memory/1552-82-0x0000000004AB1000-0x0000000004AB2000-memory.dmp
    Filesize

    4KB

  • memory/1552-80-0x0000000004AB0000-0x0000000004AB1000-memory.dmp
    Filesize

    4KB

  • memory/1552-78-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1552-75-0x000000000043773E-mapping.dmp
  • memory/1552-70-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1552-71-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1552-72-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1552-73-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1552-74-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-59-0x0000000000000000-mapping.dmp
  • memory/1628-68-0x0000000000920000-0x0000000000921000-memory.dmp
    Filesize

    4KB

  • memory/1628-67-0x00000000008C0000-0x00000000008CB000-memory.dmp
    Filesize

    44KB

  • memory/1628-66-0x0000000004B01000-0x0000000004B02000-memory.dmp
    Filesize

    4KB

  • memory/1628-65-0x0000000000630000-0x0000000000651000-memory.dmp
    Filesize

    132KB

  • memory/1628-64-0x0000000004B00000-0x0000000004B01000-memory.dmp
    Filesize

    4KB

  • memory/1628-62-0x00000000009C0000-0x00000000009C1000-memory.dmp
    Filesize

    4KB