Analysis

  • max time kernel
    141s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/11/2023, 13:11

General

  • Target
    DOC_315892419.js
  • Size 436KB
  • Sample231121-qe7pcafd6t
  • SHA256 d8a6810d529662b18a5e2a3290848ef9f7b91ca302fc0c2f72f0db6ed03c4323
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • strela

C2
  • 193.109.85.77

Signatures

  • Strela

    An info stealer targeting mail credentials first seen in late 2022.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\DOC_315892419.js
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1012
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\DOC_315892419.js" "C:\Users\Admin\AppData\Local\Temp\\possessinformexcusesort.bat" && "C:\Users\Admin\AppData\Local\Temp\\possessinformexcusesort.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4596
      • C:\Windows\system32\findstr.exe
        findstr /V bladeshrillflamefront ""C:\Users\Admin\AppData\Local\Temp\\possessinformexcusesort.bat""
        3⤵
          PID:2484
        • C:\Windows\system32\certutil.exe
          certutil -f -decode wearymoneyclaimexpect suspectcreamtearfultravel.dll
          3⤵
            PID:4240
          • C:\Windows\system32\regsvr32.exe
            regsvr32 suspectcreamtearfultravel.dll
            3⤵
            • Loads dropped DLL
            PID:2012

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            possessinformexcusesort.bat

            • Path C:\Users\Admin\AppData\Local\Temp\possessinformexcusesort.bat
            • Size 436KB
            • SHA256 d8a6810d529662b18a5e2a3290848ef9f7b91ca302fc0c2f72f0db6ed03c4323
            • MD5 SHA1 SHA512 SSDEEP

            possessinformexcusesort.bat

            • Path C:\Users\Admin\AppData\Local\Temp\possessinformexcusesort.bat
            • Size 436KB
            • SHA256 d8a6810d529662b18a5e2a3290848ef9f7b91ca302fc0c2f72f0db6ed03c4323
            • MD5 SHA1 SHA512 SSDEEP

            suspectcreamtearfultravel.dll

            • Path C:\Users\Admin\AppData\Local\Temp\suspectcreamtearfultravel.dll
            • Size 252KB
            • SHA256 e0239eb26737fd8872dacd4e5b4e65c0447082417820cad3f43c53fd935a3e0c
            • MD5 SHA1 SHA512 SSDEEP

            suspectcreamtearfultravel.dll

            • Path C:\Users\Admin\AppData\Local\Temp\suspectcreamtearfultravel.dll
            • Size 252KB
            • SHA256 e0239eb26737fd8872dacd4e5b4e65c0447082417820cad3f43c53fd935a3e0c
            • MD5 SHA1 SHA512 SSDEEP

            wearymoneyclaimexpect

            • Path C:\Users\Admin\AppData\Local\Temp\wearymoneyclaimexpect
            • Size 336KB
            • SHA256 53ce9ba67b55ffee8292eeabcac6cf2b37c33433988ca47935a31d9899f5de3a
            • MD5 SHA1 SHA512 SSDEEP

            memory/2012-270-0x00000000004A0000-0x00000000004C1000-memory.dmp

            memory/2012-271-0x000000006D7C0000-0x000000006D807000-memory.dmp