Overview

overview

7

Static

static

1

cylance_ra...in.exe

windows7-x64

6

cylance_ra...in.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    191s
  • max time network
    183s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    31-03-2023 00:28

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General

  • Target

    cylance_ransomware_Windows-sample.exe.bin.exe

  • Size

    151KB

  • MD5

    31ed39e13ae9da7fa610f85b56838dde

  • SHA1

    ff602997ce7bdd695a282bd373daf57bea7a051f

  • SHA256

    7a5e813ec451cde49346d7e18aca31065846cafe52d88d08918a297196a6a49f

  • SHA512

    199d70b70636555fbe753e83662cc672b5b06428050229856e9912488037cb4dae34a0766c3fcc560afd8fb07a4dcb5cfd8435a0fe3db86484a7929218cab5ee

  • SSDEEP

    3072:lAMP+TYgJWo6QD6ivAFvvYknplbZVaX6TEQZwRNfysqdoTPwum3n:OZNMnQFvM/lbbHTFZw/fLm3n

Score
6/10

Malware Config

Signatures

  • Enumerates connected drives 3 TTPs 25 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\cylance_ransomware_Windows-sample.exe.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\cylance_ransomware_Windows-sample.exe.bin.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c SCHTASKS.exe /Create /RU "NT AUTHORITY\SYSTEM" /sc onstart /TN "Windows Update BETA" /TR "C:\Users\Admin\AppData\Local\Temp\cylance_ransomware_Windows-sample.exe.bin.exe" /F
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:576
      • C:\Windows\SysWOW64\schtasks.exe
        SCHTASKS.exe /Create /RU "NT AUTHORITY\SYSTEM" /sc onstart /TN "Windows Update BETA" /TR "C:\Users\Admin\AppData\Local\Temp\cylance_ransomware_Windows-sample.exe.bin.exe" /F
        3⤵
        • Creates scheduled task(s)
        PID:572
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1804

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\CYLANCE_README.txt
    Filesize

    1KB

    MD5

    29f5cd37815c27a48a1ac0f7aa106c7d

    SHA1

    eb03d56e438adb0ed8c21e6a8befe3a1af26d571

    SHA256

    10d4cb1b571df00c5d13cf50635118d29847980d8a7d56518bf12e74495ecf7b

    SHA512

    169ff36b6b1e96b5ab1ec3d2f67268bc6486775676a933c3d338c21e2318fb011ed74b98c7252222d525a298cadb6997ba3207c9113560c4473697a4018f3f7f

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