Analysis

  • max time kernel
    122s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    15/10/2024, 23:46

General

  • Target
    rcsetup154.exe
  • Size 25.3MB
  • Sample241015-3slegstake
  • SHA256 dbf0895d886b428c8465ee57aea56a7e7b6e4c003efd04ca00d216a2d821eac9
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Writes to the Master Boot Record (MBR) 1 TTPs 3 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • 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 Program Files directory 54 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Checks processor information in registry 2 TTPs 6 IoCs

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

  • Modifies data under HKEY_USERS 19 IoCs
  • Modifies registry class 28 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rcsetup154.exe
    "C:\Users\Admin\AppData\Local\Temp\rcsetup154.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Drops file in Program Files directory
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /I "C:\Program Files\Recuva\RecuvaShell64.dll" /s
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2496
      • C:\Windows\system32\regsvr32.exe
        /I "C:\Program Files\Recuva\RecuvaShell64.dll" /s
        3⤵
        • Loads dropped DLL
        • Modifies registry class
        PID:2248
    • C:\Program Files\Recuva\recuva64.exe
      "C:\Program Files\Recuva\recuva64.exe" /installationComplete "bin|folders|allusers"
      2⤵
      • Writes to the Master Boot Record (MBR)
      • Drops file in Program Files directory
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      PID:2220
    • C:\Program Files\Recuva\recuva64.exe
      "C:\Program Files\Recuva\recuva64.exe"
      2⤵
      • Writes to the Master Boot Record (MBR)
      • Drops file in Program Files directory
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      PID:1648
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 780
      2⤵
      • Program crash
      PID:2008

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        lang-1050.dll

        • Path C:\Program Files\Recuva\lang\lang-1050.dll
        • Size 51KB
        • SHA256 4b7d0341102e062077af9ce99a12412dc3c11044bbbc782194681f47146b6494
        • MD5 SHA1 SHA512 SSDEEP

        V01.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\WebCache\V01.log
        • Size 512KB
        • SHA256 19ee777dcaef3c7b02b3f5c7fecd99ac2754826a91ffaf73cddb13de91b85d5d
        • MD5 SHA1 SHA512 SSDEEP

        WebCacheV01.dat

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\WebCache\WebCacheV01.dat
        • Size 20.1MB
        • SHA256 072f705935922dd49d0ef71b9eddbba5dd08507e3afbed8365077a28a5e2170a
        • MD5 SHA1 SHA512 SSDEEP

        PF_logo.png

        • Path C:\Users\Admin\AppData\Local\Temp\nsoD79C.tmp\ui\res\PF_logo.png
        • Size 3KB
        • SHA256 8dd37d3721e25c32c5bf878b6dba9e61d04b7ce8aec45bdf703a41bc41802dfa
        • MD5 SHA1 SHA512

        RC_Computer.png

        • Path C:\Users\Admin\AppData\Local\Temp\nsoD79C.tmp\ui\res\RC_Computer.png
        • Size 82KB
        • SHA256 044ec2d36e9f573d762fc8a43eb09f7b24eb30094a4e61b5d606fd96f72d391f
        • MD5 SHA1 SHA512 SSDEEP

        Recuva_Logo_72px.png

        • Path C:\Users\Admin\AppData\Local\Temp\nsoD79C.tmp\ui\res\Recuva_Logo_72px.png
        • Size 9KB
        • SHA256 f72782600989eff0aa13ff7c63875538c9042c32b77862475c899514f61c9290
        • MD5 SHA1 SHA512 SSDEEP

        lang-1025.dll

        • Path \Program Files\Recuva\Lang\lang-1025.dll
        • Size 44KB
        • SHA256 0dd80b0a75d09c587b54e4c527af5650ce0678d8dfb2627ff097439853b71a0a
        • MD5 SHA1 SHA512 SSDEEP

        lang-1026.dll

        • Path \Program Files\Recuva\Lang\lang-1026.dll
        • Size 46KB
        • SHA256 10b7e73b445eb063300f8d5b76cc8b91e3de63ee4084c4766a7d68000a5a52e6
        • MD5 SHA1 SHA512 SSDEEP

        lang-1027.dll

        • Path \Program Files\Recuva\Lang\lang-1027.dll
        • Size 51KB
        • SHA256 8156b27c1677ff3d5a0208aed2e01cec4d5e5b55e3390875329340d5f7972a27
        • MD5 SHA1 SHA512 SSDEEP

        lang-1028.dll

        • Path \Program Files\Recuva\Lang\lang-1028.dll
        • Size 27KB
        • SHA256 16b27a8f4cf64a56cfdb8fe84ac497c8fbdaac3385bc0975ae63c39820f311d3
        • MD5 SHA1 SHA512 SSDEEP

        lang-1029.dll

        • Path \Program Files\Recuva\Lang\lang-1029.dll
        • Size 46KB
        • SHA256 bb648a873d5df48f1e2c3b7889c7ddbeddcfcc3d9ffdfdb5312a06e639fd7146
        • MD5 SHA1 SHA512 SSDEEP

        lang-1030.dll

        • Path \Program Files\Recuva\Lang\lang-1030.dll
        • Size 46KB
        • SHA256 66be2616822511ddb956e352ed21beccfa5ae9299f5c925838161b26bba454ac
        • MD5 SHA1 SHA512 SSDEEP

        lang-1031.dll

        • Path \Program Files\Recuva\Lang\lang-1031.dll
        • Size 49KB
        • SHA256 e8c68e0bb516fd172c966c78fccb934fcc034e9b4cb909d3356b2f894ccf9177
        • MD5 SHA1 SHA512 SSDEEP

        lang-1032.dll

        • Path \Program Files\Recuva\Lang\lang-1032.dll
        • Size 52KB
        • SHA256 21bb1f597d5e6ec2835eb9065a11e8bd39ca865102f4de20cb676fbb1a331ac0
        • MD5 SHA1 SHA512 SSDEEP

        lang-1034.dll

        • Path \Program Files\Recuva\Lang\lang-1034.dll
        • Size 52KB
        • SHA256 d0a2939bdb56722b72b45a11c8d1b92de943b06ff6ab85b7119631ef7201bbbc
        • MD5 SHA1 SHA512 SSDEEP

        lang-1035.dll

        • Path \Program Files\Recuva\Lang\lang-1035.dll
        • Size 48KB
        • SHA256 60be5324d22ab098bda84e94217de5a01841f282d9bd2222105500dc8cb05142
        • MD5 SHA1 SHA512 SSDEEP

        lang-1036.dll

        • Path \Program Files\Recuva\Lang\lang-1036.dll
        • Size 52KB
        • SHA256 302c8535823e4680cd5be12882063dd38fea9ed8d06e191d4fb20f20bcc38e8b
        • MD5 SHA1 SHA512 SSDEEP

        lang-1037.dll

        • Path \Program Files\Recuva\Lang\lang-1037.dll
        • Size 40KB
        • SHA256 cb72a05f8c33621781d777133de8e7c14d43d14598ca08c4af4bb756948568c0
        • MD5 SHA1 SHA512 SSDEEP

        lang-1038.dll

        • Path \Program Files\Recuva\Lang\lang-1038.dll
        • Size 50KB
        • SHA256 87ec0ce45b22f524ebbf497777cb17fdf4e4346915fa6a2b9f13be85ea05fbf7
        • MD5 SHA1 SHA512 SSDEEP

        lang-1040.dll

        • Path \Program Files\Recuva\Lang\lang-1040.dll
        • Size 50KB
        • SHA256 116c74beb855d6715c83b664794f8bb3d3946f677c0b3befecc7cec8e1b6093f
        • MD5 SHA1 SHA512 SSDEEP

        lang-1041.dll

        • Path \Program Files\Recuva\Lang\lang-1041.dll
        • Size 32KB
        • SHA256 2ff82dbbaabeb196aa0c070d7f2fd0eb40346e51d4e8ad5ac398ec56d96ac393
        • MD5 SHA1 SHA512 SSDEEP

        lang-1043.dll

        • Path \Program Files\Recuva\Lang\lang-1043.dll
        • Size 52KB
        • SHA256 cc3bafd490827c81a6e82f15695fbc3af988d491bdb0559c9c76ee60ba8deb2b
        • MD5 SHA1 SHA512 SSDEEP

        lang-1044.dll

        • Path \Program Files\Recuva\Lang\lang-1044.dll
        • Size 46KB
        • SHA256 301d83c11f5a07cdc686d3d91d075cd69c38beae8d0aac3af1f4b825588d11a6
        • MD5 SHA1 SHA512 SSDEEP

        lang-1045.dll

        • Path \Program Files\Recuva\Lang\lang-1045.dll
        • Size 49KB
        • SHA256 a35b4506ea3694754ce1eb0d8e29f2f78b2365d96b7302e7c9c6fdf8a0266eb9
        • MD5 SHA1 SHA512 SSDEEP

        lang-1046.dll

        • Path \Program Files\Recuva\Lang\lang-1046.dll
        • Size 48KB
        • SHA256 e3c7fe920d284ef7974175c52f374ee412580f83707d58ef2dec51ae403159e6
        • MD5 SHA1 SHA512 SSDEEP

        lang-1048.dll

        • Path \Program Files\Recuva\Lang\lang-1048.dll
        • Size 47KB
        • SHA256 975aeb207d52e07a0aadeb934476536f8c6b7deec29d5d111baf89f3bac76fdc
        • MD5 SHA1 SHA512 SSDEEP

        lang-1049.dll

        • Path \Program Files\Recuva\Lang\lang-1049.dll
        • Size 45KB
        • SHA256 222db72107c1452f141ea8d086473458c59f6675566b01177fc91265855ab067
        • MD5 SHA1 SHA512 SSDEEP

        RecuvaShell64.dll

        • Path \Program Files\Recuva\RecuvaShell64.dll
        • Size 375KB
        • SHA256 2b406578019ba9b6afcb08b26c56c4017c6fa6dea102129dd44dc47fc74a2cc4
        • MD5 SHA1 SHA512 SSDEEP

        recuva64.exe

        • Path \Program Files\Recuva\recuva64.exe
        • Size 20.1MB
        • SHA256 d42b70bb05ef00c09319a975e1df73c1a7d1a52b537c2f605dbf0b4dccf814fc
        • MD5 SHA1 SHA512 SSDEEP

        ButtonEvent.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\ButtonEvent.dll
        • Size 5KB
        • SHA256 e2da6d8b73b5954d58baa89a949aacece0527dfb940ca130ac6d3fd992d0909d
        • MD5 SHA1 SHA512 SSDEEP

        INetC.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\INetC.dll
        • Size 23KB
        • SHA256 5233110ed8e95a4a1042f57d9b2dc72bc253e8cb5282437637a51e4e9fcb9079
        • MD5 SHA1 SHA512 SSDEEP

        System.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\System.dll
        • Size 12KB
        • SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
        • MD5 SHA1 SHA512 SSDEEP

        UserInfo.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\UserInfo.dll
        • Size 4KB
        • SHA256 e54989d2b83e7282d0bec56b098635146aab5d5a283f1f89486816851ef885a0
        • MD5 SHA1 SHA512

        gcapi_dll.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\g\gcapi_dll.dll
        • Size 348KB
        • SHA256 d0e4581210a22135ce5deb47d9df4d636a94b3813e0649aab84822c9f08af2a0
        • MD5 SHA1 SHA512 SSDEEP

        nsDialogs.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\nsDialogs.dll
        • Size 9KB
        • SHA256 56b96add1978b1abba286f7f8982b0efbe007d4a48b3ded6a4d408e01d753fe2
        • MD5 SHA1 SHA512 SSDEEP

        InstallerHelper.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\p\InstallerHelper.dll
        • Size 12.9MB
        • SHA256 6aa7b6f12487c9740666d37a98b0c7b987b7e023a1640f8a6ab1b049a35f9374
        • MD5 SHA1 SHA512 SSDEEP

        pfUI.dll

        • Path \Users\Admin\AppData\Local\Temp\nsoD79C.tmp\ui\pfUI.dll
        • Size 18.2MB
        • SHA256 a639f28eb67410b9d685ff7eb564eb8c1a45f1116a6c520321510c8c6eb89923
        • MD5 SHA1 SHA512 SSDEEP

        memory/2380-148-0x0000000006E80000-0x0000000006E81000-memory.dmp

        memory/2380-134-0x0000000006F20000-0x0000000006F28000-memory.dmp

        memory/2380-212-0x0000000007020000-0x0000000007028000-memory.dmp

        memory/2380-167-0x0000000006E80000-0x0000000006E81000-memory.dmp

        memory/2380-162-0x0000000006E60000-0x0000000006E61000-memory.dmp

        memory/2380-160-0x0000000006EF0000-0x0000000006EF8000-memory.dmp

        memory/2380-215-0x0000000007060000-0x0000000007068000-memory.dmp

        memory/2380-146-0x0000000006EC0000-0x0000000006EC8000-memory.dmp

        memory/2380-157-0x0000000006EC0000-0x0000000006EC8000-memory.dmp

        memory/2380-140-0x0000000006EC0000-0x0000000006EC1000-memory.dmp

        memory/2380-243-0x00000000003F0000-0x00000000003F1000-memory.dmp

        memory/2380-109-0x00000000048A0000-0x00000000048B0000-memory.dmp

        memory/2380-103-0x00000000043F0000-0x0000000004400000-memory.dmp

        memory/2380-85-0x00000000003F0000-0x00000000003F1000-memory.dmp

        memory/2380-217-0x0000000007010000-0x0000000007011000-memory.dmp