Analysis

  • max time kernel
    179s
  • max time network
    221s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    08-05-2022 06:28

General

  • Target

    ac755e035a8d5d91395277e4283d83198e820d743924698b863439aa8a82a340.exe

  • Size

    963KB

  • MD5

    99d104f5701496f3e10e96cfa898a50d

  • SHA1

    6f83c38fcb9c2fecc06875854ea9e3cd91d3a973

  • SHA256

    ac755e035a8d5d91395277e4283d83198e820d743924698b863439aa8a82a340

  • SHA512

    3285507f051a27eb1f37e774ea004ccb28ab94fa764ca0a45c06d4d6ed8c9b02be7a5e11749f721ac4f115296e32cc4308b90b91d1e94663beef9809f8788eec

Malware Config

Extracted

Family

matiex

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ze5qw@iC?1E}

Signatures

  • Matiex

    Matiex is a keylogger and infostealer first seen in July 2020.

  • Matiex Main Payload 6 IoCs
  • 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ac755e035a8d5d91395277e4283d83198e820d743924698b863439aa8a82a340.exe
    "C:\Users\Admin\AppData\Local\Temp\ac755e035a8d5d91395277e4283d83198e820d743924698b863439aa8a82a340.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2000
    • C:\Users\Admin\AppData\Local\Temp\ac755e035a8d5d91395277e4283d83198e820d743924698b863439aa8a82a340.exe
      "C:\Users\Admin\AppData\Local\Temp\ac755e035a8d5d91395277e4283d83198e820d743924698b863439aa8a82a340.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1524

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1524-64-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1524-63-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1524-70-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1524-68-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1524-66-0x000000000046BEDE-mapping.dmp
  • memory/1524-61-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1524-65-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/1524-60-0x0000000000400000-0x0000000000470000-memory.dmp
    Filesize

    448KB

  • memory/2000-55-0x00000000763E1000-0x00000000763E3000-memory.dmp
    Filesize

    8KB

  • memory/2000-54-0x00000000001D0000-0x00000000002C6000-memory.dmp
    Filesize

    984KB

  • memory/2000-59-0x0000000001F60000-0x0000000001F72000-memory.dmp
    Filesize

    72KB

  • memory/2000-58-0x0000000000540000-0x000000000054C000-memory.dmp
    Filesize

    48KB

  • memory/2000-57-0x0000000000410000-0x0000000000434000-memory.dmp
    Filesize

    144KB

  • memory/2000-56-0x00000000003C0000-0x00000000003E8000-memory.dmp
    Filesize

    160KB