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Analysis

  • max time kernel
    150s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/07/2023, 05:36

General

  • Target

    6627c09a3d6988dc4540ccb75fd45947.exe

  • Size

    205KB

  • MD5

    6627c09a3d6988dc4540ccb75fd45947

  • SHA1

    9567b0c5cfdd62851811b1e17cf33df9b1fe751d

  • SHA256

    80704af0d47ef04775cd787dc8d5c6973ac75408aac1e87fa0cfa5ee5e2d0b90

  • SHA512

    0c307320084dd9b905f8e0302eb21e362c1960ba0d4266d6711f7560e45821f75f8a2296df90a689cc7e220c8714d0e266c81b946d52a043480579bc3df74d9b

  • SSDEEP

    3072:IZJ6kNLk5QXovXZBeOnzb/cHzgDJfC7LySgzjmg3Jr1aKVT:IBNLsjvpgfHzgpC7mSijmapaKVT

Malware Config

Extracted

Family

stealc

C2

http://45.15.159.188/f2cb651e3e755a0f.php

Signatures

  • Detects Stealc stealer 2 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

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

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

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

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

  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6627c09a3d6988dc4540ccb75fd45947.exe
    "C:\Users\Admin\AppData\Local\Temp\6627c09a3d6988dc4540ccb75fd45947.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1200
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\HIJJDGDHDG.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3996
      • C:\Users\Admin\AppData\Local\Temp\HIJJDGDHDG.exe
        "C:\Users\Admin\AppData\Local\Temp\HIJJDGDHDG.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2032
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
          4⤵
            PID:1756
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2032 -s 360
            4⤵
            • Program crash
            PID:1704
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1200 -s 2612
        2⤵
        • Program crash
        PID:4172
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1200 -ip 1200
      1⤵
        PID:536
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 2032 -ip 2032
        1⤵
          PID:4164

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\mozglue.dll

          Filesize

          593KB

          MD5

          c8fd9be83bc728cc04beffafc2907fe9

          SHA1

          95ab9f701e0024cedfbd312bcfe4e726744c4f2e

          SHA256

          ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

          SHA512

          fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

        • C:\ProgramData\mozglue.dll

          Filesize

          593KB

          MD5

          c8fd9be83bc728cc04beffafc2907fe9

          SHA1

          95ab9f701e0024cedfbd312bcfe4e726744c4f2e

          SHA256

          ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

          SHA512

          fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

        • C:\ProgramData\nss3.dll

          Filesize

          2.0MB

          MD5

          1cc453cdf74f31e4d913ff9c10acdde2

          SHA1

          6e85eae544d6e965f15fa5c39700fa7202f3aafe

          SHA256

          ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

          SHA512

          dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

        • C:\Users\Admin\AppData\Local\Temp\HIJJDGDHDG.exe

          Filesize

          4.5MB

          MD5

          bd60dc5b185cd30c2f8318b46ec0214e

          SHA1

          bc1455bc54572efd5f0e1bf9976ad46b38bd76db

          SHA256

          0be5db22e71c2983af529792c6b496ac4057b331902759e08aac8de8e5fbb8df

          SHA512

          440a16c8dabb390a15a7b38781a70d1164b569b448b0702b2ad3747deefbe5dbe9d9398f9bc125a9859fe7e5aea06fb40b0a694d4224e0d650cee2c336115b34

        • C:\Users\Admin\AppData\Local\Temp\HIJJDGDHDG.exe

          Filesize

          4.5MB

          MD5

          bd60dc5b185cd30c2f8318b46ec0214e

          SHA1

          bc1455bc54572efd5f0e1bf9976ad46b38bd76db

          SHA256

          0be5db22e71c2983af529792c6b496ac4057b331902759e08aac8de8e5fbb8df

          SHA512

          440a16c8dabb390a15a7b38781a70d1164b569b448b0702b2ad3747deefbe5dbe9d9398f9bc125a9859fe7e5aea06fb40b0a694d4224e0d650cee2c336115b34

        • memory/1200-135-0x0000000061E00000-0x0000000061EF3000-memory.dmp

          Filesize

          972KB

        • memory/1200-134-0x0000000002360000-0x0000000002376000-memory.dmp

          Filesize

          88KB

        • memory/1200-255-0x0000000000400000-0x0000000000629000-memory.dmp

          Filesize

          2.2MB

        • memory/1756-212-0x0000000000400000-0x000000000056C000-memory.dmp

          Filesize

          1.4MB

        • memory/1756-231-0x0000000000400000-0x000000000056C000-memory.dmp

          Filesize

          1.4MB

        • memory/1756-232-0x0000000000400000-0x000000000056C000-memory.dmp

          Filesize

          1.4MB

        • memory/1756-233-0x0000000000400000-0x000000000056C000-memory.dmp

          Filesize

          1.4MB

        • memory/1756-235-0x0000000000400000-0x000000000056C000-memory.dmp

          Filesize

          1.4MB