Analysis

  • max time kernel
    31s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    07-02-2023 05:52

General

  • Target

    f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe

  • Size

    667KB

  • MD5

    c8cd51f521e9436f5f6001dd25f86a31

  • SHA1

    0b469538d64ac263cec4c8380433b9477cf35305

  • SHA256

    f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67

  • SHA512

    ee8b9099ba988195b3896dc4ce683349e4d9bd64307675aa41289d32ff4310eef519007c5cdb203fe6d83fc06bf03f78449833925c0e31b10c0037c493f63dc8

  • SSDEEP

    12288:PnRFRJdPCNViYXovxnAKgEtVM18deuozbxamP2IcAJ+hocmQo:PnRFRJdPCmvxSKbEuGamP2yn

Score
8/10
upx

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 6 IoCs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe
    "C:\Users\Admin\AppData\Local\Temp\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:792
    • C:\Users\Admin\AppData\Local\Temp\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe
      "C:\Users\Admin\AppData\Local\Temp\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe" /crashlogger /crash-reporter-parent-id=792
      2⤵
      • Checks processor information in registry
      PID:1724
    • C:\Users\Admin\AppData\Local\Temp\Opera Installer\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe
      "C:\Users\Admin\AppData\Local\Temp\Opera Installer\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe" --version
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      PID:1324
    • C:\Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe
      "C:\Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe" --internal-version
      2⤵
      • Executes dropped EXE
      PID:1420
    • C:\Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe
      "C:\Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe" --stream
      2⤵
      • Executes dropped EXE
      PID:1384

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Opera Installer\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe

    Filesize

    667KB

    MD5

    c8cd51f521e9436f5f6001dd25f86a31

    SHA1

    0b469538d64ac263cec4c8380433b9477cf35305

    SHA256

    f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67

    SHA512

    ee8b9099ba988195b3896dc4ce683349e4d9bd64307675aa41289d32ff4310eef519007c5cdb203fe6d83fc06bf03f78449833925c0e31b10c0037c493f63dc8

  • C:\Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe

    Filesize

    35.9MB

    MD5

    36f8b3bb2ba2194db065637af8bf4453

    SHA1

    1262df44dcc47e5a81f17e559252247f9f35b914

    SHA256

    ac4dfaed56f4a4259befff7471d8d297e3d5c13951aad6b64280830dd36d1724

    SHA512

    7c22d94fcb5cba4669d53929a73240879875c26cfa43bf9135c1772e024fe8991618150fa26550e89fdb5a40e6e642d80ab81c523dba29f441c1b389a9fc37c6

  • C:\Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe

    Filesize

    35.9MB

    MD5

    36f8b3bb2ba2194db065637af8bf4453

    SHA1

    1262df44dcc47e5a81f17e559252247f9f35b914

    SHA256

    ac4dfaed56f4a4259befff7471d8d297e3d5c13951aad6b64280830dd36d1724

    SHA512

    7c22d94fcb5cba4669d53929a73240879875c26cfa43bf9135c1772e024fe8991618150fa26550e89fdb5a40e6e642d80ab81c523dba29f441c1b389a9fc37c6

  • \Users\Admin\AppData\Local\Temp\Opera Installer\f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67.exe

    Filesize

    667KB

    MD5

    c8cd51f521e9436f5f6001dd25f86a31

    SHA1

    0b469538d64ac263cec4c8380433b9477cf35305

    SHA256

    f9852b7c66c42821896016396ee08cfb3432ded59670aa4e761c77d673cdfa67

    SHA512

    ee8b9099ba988195b3896dc4ce683349e4d9bd64307675aa41289d32ff4310eef519007c5cdb203fe6d83fc06bf03f78449833925c0e31b10c0037c493f63dc8

  • \Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe

    Filesize

    35.9MB

    MD5

    36f8b3bb2ba2194db065637af8bf4453

    SHA1

    1262df44dcc47e5a81f17e559252247f9f35b914

    SHA256

    ac4dfaed56f4a4259befff7471d8d297e3d5c13951aad6b64280830dd36d1724

    SHA512

    7c22d94fcb5cba4669d53929a73240879875c26cfa43bf9135c1772e024fe8991618150fa26550e89fdb5a40e6e642d80ab81c523dba29f441c1b389a9fc37c6

  • \Users\Admin\AppData\Local\Temp\Opera Installer\opera_installer_20230207065245.exe

    Filesize

    35.9MB

    MD5

    36f8b3bb2ba2194db065637af8bf4453

    SHA1

    1262df44dcc47e5a81f17e559252247f9f35b914

    SHA256

    ac4dfaed56f4a4259befff7471d8d297e3d5c13951aad6b64280830dd36d1724

    SHA512

    7c22d94fcb5cba4669d53929a73240879875c26cfa43bf9135c1772e024fe8991618150fa26550e89fdb5a40e6e642d80ab81c523dba29f441c1b389a9fc37c6

  • memory/792-76-0x0000000000CA0000-0x0000000000DFF000-memory.dmp

    Filesize

    1.4MB

  • memory/792-58-0x00000000763D1000-0x00000000763D3000-memory.dmp

    Filesize

    8KB

  • memory/792-77-0x00000000008E0000-0x0000000000A3F000-memory.dmp

    Filesize

    1.4MB

  • memory/792-79-0x00000000028A0000-0x00000000029FF000-memory.dmp

    Filesize

    1.4MB

  • memory/792-80-0x0000000000CA0000-0x0000000000DFF000-memory.dmp

    Filesize

    1.4MB

  • memory/792-66-0x0000000000160000-0x0000000000165000-memory.dmp

    Filesize

    20KB

  • memory/792-65-0x0000000000160000-0x0000000000165000-memory.dmp

    Filesize

    20KB

  • memory/1324-75-0x00000000001C0000-0x000000000031F000-memory.dmp

    Filesize

    1.4MB

  • memory/1324-68-0x0000000000000000-mapping.dmp

  • memory/1384-86-0x0000000000000000-mapping.dmp

  • memory/1420-82-0x0000000000000000-mapping.dmp

  • memory/1724-78-0x0000000000CA0000-0x0000000000DFF000-memory.dmp

    Filesize

    1.4MB

  • memory/1724-59-0x0000000000000000-mapping.dmp