Analysis

  • max time kernel
    4294199s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20220311-en
  • submitted
    30-03-2022 02:35

General

  • Target

    7e997a0cd3967a8010e9fe1d78e29dbcfc4c84abc33537dec2b677d7fad57d7f.exe

  • Size

    2.2MB

  • MD5

    3b9508873f316fcd7a8c327896526809

  • SHA1

    5592790f1989c4afafa1d37d7bc1c6e8c4c56111

  • SHA256

    7e997a0cd3967a8010e9fe1d78e29dbcfc4c84abc33537dec2b677d7fad57d7f

  • SHA512

    848e5f6267f8f4a7eb456d5744a8c83c66381bb650498d97955d667005328a30bf45c5c862a6a3503d9eb47aac13bc6684ce4383504fe57fde77b37d63355f42

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Executes dropped EXE 2 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 7 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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.

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

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

  • Program crash 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 50 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7e997a0cd3967a8010e9fe1d78e29dbcfc4c84abc33537dec2b677d7fad57d7f.exe
    "C:\Users\Admin\AppData\Local\Temp\7e997a0cd3967a8010e9fe1d78e29dbcfc4c84abc33537dec2b677d7fad57d7f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:892
    • C:\Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
      "C:\Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Checks whether UAC is enabled
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:768
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 768 -s 1552
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:2012
    • C:\Users\Admin\AppData\Local\Temp\Ggtlzx.exe
      "C:\Users\Admin\AppData\Local\Temp\Ggtlzx.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1656
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" https://sellix.io/NYANxCAT/
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1020
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1020 CREDAT:275457 /prefetch:2
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious use of SetWindowsHookEx
          PID:1636

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Bootkit

1
T1067

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    344B

    MD5

    a9fcca8697d00f210b7ac5a17bde72ce

    SHA1

    c74a1dd5b3c73534351dd64d2a7dd3a30c7630b1

    SHA256

    4725b57dd05dc284f1635d61cd4eff991ca02d8b68d1a421f8e895ad609ae442

    SHA512

    09c1fd5834c86beff8f4bb89fa9fdb954e652ce05e0d4ca7278653a75218b076e8364bbc060d673c21120cb94d0acbcad4656b1c34ff760ca5b2646c67e70d8e

  • C:\Users\Admin\AppData\Local\Temp\Ggtlzx.exe
    Filesize

    351KB

    MD5

    67ce3bcdb0efa71aa51c47f86e165b67

    SHA1

    e709f09587136c0821f46c4b1272dd1b192207d4

    SHA256

    6f7769da2a7dfecfed90a2c5374dda152649d97986cfb4e000a6341f63652dab

    SHA512

    e04a6e1ecdf2d7e7f58dbc1485921b4cbadcd6289b2694a12187b22ac208529e455d87f9d8b41d479def07c299a7186fb3cab3ac5a0dc110194a50a27886aef9

  • C:\Users\Admin\AppData\Local\Temp\Ggtlzx.exe
    Filesize

    351KB

    MD5

    67ce3bcdb0efa71aa51c47f86e165b67

    SHA1

    e709f09587136c0821f46c4b1272dd1b192207d4

    SHA256

    6f7769da2a7dfecfed90a2c5374dda152649d97986cfb4e000a6341f63652dab

    SHA512

    e04a6e1ecdf2d7e7f58dbc1485921b4cbadcd6289b2694a12187b22ac208529e455d87f9d8b41d479def07c299a7186fb3cab3ac5a0dc110194a50a27886aef9

  • C:\Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\NTWGOTFX.txt
    Filesize

    607B

    MD5

    3eb2da6af2f28e062736819e0fbdc1f3

    SHA1

    652e9e2fd2888f92b5ffe8bdc058a89b32ec7562

    SHA256

    7ff04149ee2aab1f5b4dbfb00ef60f293e15b689d0a0358b2bfed0a973dacbf2

    SHA512

    79649e349b15c58cc6e95880b0b62daadb062c76c01f66cfac399ff6e98720bc8cf954b838133565a103692978af5a1cc733bb4583d94c1ca385f35113eb3d63

  • \Users\Admin\AppData\Local\Temp\Ggtlzx.exe
    Filesize

    351KB

    MD5

    67ce3bcdb0efa71aa51c47f86e165b67

    SHA1

    e709f09587136c0821f46c4b1272dd1b192207d4

    SHA256

    6f7769da2a7dfecfed90a2c5374dda152649d97986cfb4e000a6341f63652dab

    SHA512

    e04a6e1ecdf2d7e7f58dbc1485921b4cbadcd6289b2694a12187b22ac208529e455d87f9d8b41d479def07c299a7186fb3cab3ac5a0dc110194a50a27886aef9

  • \Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • \Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • \Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • \Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • \Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • \Users\Admin\AppData\Local\Temp\Wfmzantzeocxy.exe
    Filesize

    2.8MB

    MD5

    1dfda4abbd51e74613b3ba1677af903e

    SHA1

    ad38064749d2fe61cd643ae285a3908bf8f9de57

    SHA256

    e5b6669d36d5bc85497f953c51aac4dfe9d7b5ce1dd9b43e6c26d345eba35948

    SHA512

    0498240682315a996aadba546d64a7036d403fd252f041aac287b60b32a747c0093b0ef5e8d30dad3ac89f12d9ce22b71e8ef676afe5be1b315db3ebe0229687

  • memory/768-66-0x00000000001E0000-0x00000000004BE000-memory.dmp
    Filesize

    2.9MB

  • memory/768-67-0x0000000077300000-0x0000000077480000-memory.dmp
    Filesize

    1.5MB

  • memory/768-65-0x00000000001E0000-0x00000000004BE000-memory.dmp
    Filesize

    2.9MB

  • memory/768-62-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
    Filesize

    8KB

  • memory/768-56-0x0000000000000000-mapping.dmp
  • memory/892-54-0x0000000000400000-0x0000000000642000-memory.dmp
    Filesize

    2.3MB

  • memory/1656-69-0x000000001B286000-0x000000001B2A5000-memory.dmp
    Filesize

    124KB

  • memory/1656-68-0x000000001B280000-0x000000001B282000-memory.dmp
    Filesize

    8KB

  • memory/1656-64-0x0000000000390000-0x00000000003EE000-memory.dmp
    Filesize

    376KB

  • memory/1656-59-0x0000000000000000-mapping.dmp
  • memory/2012-70-0x0000000000000000-mapping.dmp