Analysis

  • max time kernel
    46s
  • max time network
    108s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01-02-2023 16:34

General

  • Target

    MT-06752033.exe

  • Size

    197KB

  • MD5

    f1361a0c6bd51f1c50adf55e0c939099

  • SHA1

    45c22c0676a0ee4aa48c3361c28775e652049dc9

  • SHA256

    cda5ced44ec0c2e58d0f38f9fa63a87364cf9cebcd2d0e1a11626a8bb694703a

  • SHA512

    4ae1b7f3d055db7118106bef8008255318f65c25898517f4fb23c46ed3a9d9c4a5d1662b9bfcfa53506c2b9fef0a79145573c3b77c6a1883ca702488bd1f21b5

  • SSDEEP

    3072:FuYiMNRWiAn3tldPzBBzP/YXYtZ6w99auW:CbiAdldLPzHpl

Malware Config

Signatures

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • 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 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MT-06752033.exe
    "C:\Users\Admin\AppData\Local\Temp\MT-06752033.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1108
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1720
    • C:\Users\Admin\AppData\Local\Temp\MT-06752033.exe
      C:\Users\Admin\AppData\Local\Temp\MT-06752033.exe
      2⤵
      • Accesses Microsoft Outlook profiles
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1092
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1092 -s 1888
        3⤵
        • Program crash
        PID:1908

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1092-69-0x00000000004D08CE-mapping.dmp
  • memory/1092-66-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1092-63-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1092-64-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1092-76-0x0000000007BE0000-0x0000000007C92000-memory.dmp
    Filesize

    712KB

  • memory/1092-68-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1092-75-0x00000000007A0000-0x00000000007AE000-memory.dmp
    Filesize

    56KB

  • memory/1092-67-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1092-71-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1092-73-0x0000000000400000-0x00000000004D6000-memory.dmp
    Filesize

    856KB

  • memory/1108-56-0x00000000073C0000-0x00000000076E0000-memory.dmp
    Filesize

    3.1MB

  • memory/1108-62-0x0000000005680000-0x0000000005772000-memory.dmp
    Filesize

    968KB

  • memory/1108-54-0x0000000000A60000-0x0000000000A98000-memory.dmp
    Filesize

    224KB

  • memory/1108-55-0x0000000075B41000-0x0000000075B43000-memory.dmp
    Filesize

    8KB

  • memory/1720-60-0x000000006F690000-0x000000006FC3B000-memory.dmp
    Filesize

    5.7MB

  • memory/1720-61-0x000000006F690000-0x000000006FC3B000-memory.dmp
    Filesize

    5.7MB

  • memory/1720-59-0x000000006F690000-0x000000006FC3B000-memory.dmp
    Filesize

    5.7MB

  • memory/1720-57-0x0000000000000000-mapping.dmp
  • memory/1908-77-0x0000000000000000-mapping.dmp