Analysis

  • max time kernel
    138s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-08-2024 11:14

General

  • Target

    $TEMP/install_flash_player_active_x.exe

  • Size

    1.5MB

  • MD5

    4c223aa3e559e2e88da3bb43f3604d20

  • SHA1

    a6d0f099262e9e7b9289b8a7bdcfa550821584ef

  • SHA256

    3896ac00208eebea9f62aacf09ccd7324fe86048bfbb20740b72c3874615878b

  • SHA512

    5f0c9721ad857990ae6d9420080cee0d39df70a15e07520f59682cf1a137409923e3ab4e8c0f2c27b280cdb0ce936223adda167236131981aff35830beda69bc

  • SSDEEP

    24576:3hgT1P7mw7Tc+cwff55v1zHX6mVQq1Ci5dlRR+sj9xDGr4KOaJi494+jU/9SIrxC:xgTzZXf5f36mVZ73R+99FWMIrxj+jYu

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 6 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Loads dropped DLL 12 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Drops file in System32 directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies Internet Explorer settings 1 TTPs 6 IoCs
  • Modifies registry class 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\$TEMP\install_flash_player_active_x.exe
    "C:\Users\Admin\AppData\Local\Temp\$TEMP\install_flash_player_active_x.exe"
    1⤵
    • Boot or Logon Autostart Execution: Active Setup
    • Loads dropped DLL
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies Internet Explorer settings
    • Modifies registry class
    PID:3840

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\nsc9905.tmp\NSISArray.dll

    Filesize

    17KB

    MD5

    2b8574f6a8f5de9042baa43c069d20ba

    SHA1

    07959da0c6b7715b51f70f1b0aea1f56ba7a4559

    SHA256

    38654eef0ee3715f4b1268f4b4176a6b487a0a9e53a27a4ec0b84550ea173564

    SHA512

    f034f71b6a18ee8024d40acd3c097d95c8fd8e128d75075cc452e71898c1c0322f21b54bd39ca72d053d7261ffbab0c5c1f820602d52fc85806513a6fe317e88

  • C:\Users\Admin\AppData\Local\Temp\nsc9905.tmp\System.dll

    Filesize

    10KB

    MD5

    16ae54e23736352739d7ab156b1965ba

    SHA1

    14f8f04bed2d6adc07565d5c064f6931b128568f

    SHA256

    c11ffa087c6848f3870e6336d151f0ba6298c0e1e30ccddf2da25a06d36a61fc

    SHA512

    15dbfcdc5dc34cb20066120045e3250f8df9e50b91de043f2ada33ac0235907d98668e248828a7ed9c75e25dfb5103b7248867530ce73ee36f6a35c30b4afa9f

  • C:\Users\Admin\AppData\Local\Temp\nsc9905.tmp\UserInfo.dll

    Filesize

    4KB

    MD5

    68d73a95c628836b67ea5a717d74b38c

    SHA1

    935372db4a66f9dfd6c938724197787688e141b0

    SHA256

    21a373c52aaecce52b41aebe6d0224f53760fc3e5c575e821175eee3a1f7f226

    SHA512

    0e804deab4e647213132add4173c1d2c554c628816f56e21e274a40e185d90254e29c8bfc6fbfdfea2a492d43d23c0bfa4b276252a3f5e1993ab80ff832c4914

  • C:\Users\Admin\AppData\Local\Temp\nsc9905.tmp\fpinstall.dll

    Filesize

    8KB

    MD5

    071b6233c92f69ffa1c24243328c3b94

    SHA1

    bb583c00e87cdc65e6254c7148d37afc1bbb3095

    SHA256

    5f6c63cb0ba539d692c5461730f057d0ec6c60639d772fbdc3753c3c6e746c43

    SHA512

    7fc2db406350488ee86ccffe1e99a91e0f509ef0429063336bf6f96aab07127df352db77fe9d00ddc3aa2db7886dfbac08b6acf6a5c647859956111ca47c24f1

  • C:\Windows\SysWOW64\Macromed\Flash\Flash9e.ocx

    Filesize

    2.8MB

    MD5

    d3c50535c26190fead7785a03499c0ac

    SHA1

    6a72eea0f62b60d71cfb9da60cab6d178b1fb78f

    SHA256

    01ff419547aefb8e32715d3873540c058533ac6b0d301b1f98868aa6a17616a5

    SHA512

    55b299bcad2c7c7506f8eef0aceaf8764aa0e19e9907ff79b7e3f108d81a5d6566211dc6e9cbd29d7f1bef8f5daad9bb888ec345aa21899ab28b45394dbc21f3