Resubmissions

03-04-2023 17:17

230403-vtpvasga85 6

03-04-2023 17:14

230403-vr9fxshg7z 6

Analysis

  • max time kernel
    34s
  • max time network
    37s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    03-04-2023 17:17

General

  • Target

    PDFpower (3).exe

  • Size

    1.0MB

  • MD5

    1e2a99ae43d6365148d412b5dfee0e1c

  • SHA1

    33c02d70abb2f1f12a79cfd780d875a94e7fe877

  • SHA256

    e248b01e3ccde76b4d8e8077d4fcb4d0b70e5200bf4e738b45a0bd28fbc2cae6

  • SHA512

    d962f2e4bbeee0183a3b75f26ccc6de273c28fe5a191c83c1e4ea6c84c8f70b535273452e05c5e11e4df725cad3054e346ad0b3d98348718a00a350b87a5fa0c

  • SSDEEP

    24576:sWjYtbXSRxqO8m657w6ZBLmkitKqBCjC0PDgM5A6:sW8tbiJVV1BCjB

Score
6/10

Malware Config

Signatures

  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

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

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PDFpower (3).exe
    "C:\Users\Admin\AppData\Local\Temp\PDFpower (3).exe"
    1⤵
    • Enumerates connected drives
    • Writes to the Master Boot Record (MBR)
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:308
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 308 -s 2964
      2⤵
      • Program crash
      PID:1956

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Bootkit

1
T1067

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
    Filesize

    61KB

    MD5

    e71c8443ae0bc2e282c73faead0a6dd3

    SHA1

    0c110c1b01e68edfacaeae64781a37b1995fa94b

    SHA256

    95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

    SHA512

    b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
    Filesize

    342B

    MD5

    728def776854bf13da9ec050021b3a46

    SHA1

    7a439c602a9b8c8ca7dba0ca8898a6bbd98fc508

    SHA256

    47c11d880191b9480911c9ed020096f6a632f6f93c0be313ec6ce63a52ae9d37

    SHA512

    d33796f06cec5c07dbaafd4b9245232c2257c699f3601a654a5095f3145fadd35555e47b879293f6fd042c5940aae6a4a7ba2f20d782396b1135d31a920efd55

  • C:\Users\Admin\AppData\Local\Temp\Cab3B9D.tmp
    Filesize

    61KB

    MD5

    fc4666cbca561e864e7fdf883a9e6661

    SHA1

    2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

    SHA256

    10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

    SHA512

    c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

  • C:\Users\Admin\AppData\Local\Temp\Tar40E1.tmp
    Filesize

    161KB

    MD5

    be2bec6e8c5653136d3e72fe53c98aa3

    SHA1

    a8182d6db17c14671c3d5766c72e58d87c0810de

    SHA256

    1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

    SHA512

    0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

  • memory/308-151-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/308-176-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/308-59-0x00000000005B0000-0x00000000005BA000-memory.dmp
    Filesize

    40KB

  • memory/308-57-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/308-56-0x00000000005C0000-0x00000000005CA000-memory.dmp
    Filesize

    40KB

  • memory/308-55-0x0000000000ED0000-0x0000000000F80000-memory.dmp
    Filesize

    704KB

  • memory/308-54-0x0000000000FD0000-0x00000000010DC000-memory.dmp
    Filesize

    1.0MB

  • memory/308-172-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/308-173-0x00000000005B0000-0x00000000005BA000-memory.dmp
    Filesize

    40KB

  • memory/308-60-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/308-182-0x00000000050D0000-0x00000000050DA000-memory.dmp
    Filesize

    40KB

  • memory/308-181-0x00000000050D0000-0x00000000050DA000-memory.dmp
    Filesize

    40KB

  • memory/308-180-0x00000000050D0000-0x00000000050DA000-memory.dmp
    Filesize

    40KB

  • memory/308-179-0x00000000050D0000-0x00000000050DA000-memory.dmp
    Filesize

    40KB

  • memory/308-178-0x00000000050D0000-0x00000000050DA000-memory.dmp
    Filesize

    40KB

  • memory/308-177-0x00000000050D0000-0x00000000050DA000-memory.dmp
    Filesize

    40KB

  • memory/308-183-0x0000000004D60000-0x0000000004DA0000-memory.dmp
    Filesize

    256KB

  • memory/308-184-0x00000000005B0000-0x00000000005BA000-memory.dmp
    Filesize

    40KB