Resubmissions

22-08-2024 14:25

240822-rrpjzavajm 9

21-11-2022 08:25

221121-kbabsabc54 9

Analysis

  • max time kernel
    86s
  • max time network
    102s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21-11-2022 08:25

General

  • Target

    9c267d6fa78174b3cba8ac8de558d83a97efb8494ba1c675f1493cb41133a897.exe

  • Size

    7.1MB

  • MD5

    6c90fa5b5c9de97a444b366ec0d14255

  • SHA1

    90cd4499a264ac9e589a0a0c98e0258067aa22a7

  • SHA256

    9c267d6fa78174b3cba8ac8de558d83a97efb8494ba1c675f1493cb41133a897

  • SHA512

    538d64476d2f163f7ac3b1021e287c5ae4e041c24fe2065ca970b017015fb420b34cd5f18ff69a3e62c747ac9a64b5574de2189b0ab849dbadc72070e3f21717

  • SSDEEP

    98304:AB2pC6XG4HNkq5UKPhc24Y1/QPldHVTgPNhV0ADXqQgpkWDRIZVMnu0jjD8ueJU:RcUG4raKu24YY7HVT4hV0AD6QgqKRgX

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Themida packer 5 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 3 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9c267d6fa78174b3cba8ac8de558d83a97efb8494ba1c675f1493cb41133a897.exe
    "C:\Users\Admin\AppData\Local\Temp\9c267d6fa78174b3cba8ac8de558d83a97efb8494ba1c675f1493cb41133a897.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Modifies extensions of user files
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:748

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\e65fffb7-3d5c-4db1-92e4-3612a04c6c8b\AgileDotNetRT.dll

    Filesize

    2.8MB

    MD5

    1e275530f75ec0222ad0a49117819936

    SHA1

    c469db9377442dc65d1c4c6cc5985b28cb1c26e2

    SHA256

    d8519a2a1f40baeb1ee2e6eb1aca27745e5dcab7c046d65b27246e24af57d2bb

    SHA512

    76af1a2193a3b4dc6adc31c9d160b368c6d1a6368af1e99065b53c01cd1c6a93533167a570e6ea68959eeb06b24664f182ad7eef5d7f1ecbfc4cd55e83a72061

  • memory/748-54-0x0000000000030000-0x0000000000750000-memory.dmp

    Filesize

    7.1MB

  • memory/748-56-0x0000000074FB1000-0x0000000074FB3000-memory.dmp

    Filesize

    8KB

  • memory/748-57-0x0000000073BE0000-0x0000000074365000-memory.dmp

    Filesize

    7.5MB

  • memory/748-58-0x0000000073BE0000-0x0000000074365000-memory.dmp

    Filesize

    7.5MB

  • memory/748-59-0x0000000074C10000-0x0000000074C90000-memory.dmp

    Filesize

    512KB

  • memory/748-60-0x0000000073BE0000-0x0000000074365000-memory.dmp

    Filesize

    7.5MB

  • memory/748-61-0x0000000077530000-0x00000000776B0000-memory.dmp

    Filesize

    1.5MB

  • memory/748-62-0x0000000073BE0000-0x0000000074365000-memory.dmp

    Filesize

    7.5MB

  • memory/748-63-0x0000000077530000-0x00000000776B0000-memory.dmp

    Filesize

    1.5MB

  • memory/748-64-0x0000000002400000-0x000000000240C000-memory.dmp

    Filesize

    48KB

  • memory/748-65-0x00000000050A5000-0x00000000050B6000-memory.dmp

    Filesize

    68KB