Overview

overview

10

Static

static

3

winprofile

windows7-x64

10

winprofile

windows10-1703-x64

10

Analysis

  • max time kernel
    183s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    14-05-2024 05:00

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General

  • Target

    62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087.exe

  • Size

    885KB

  • MD5

    497ef4779c6770e4497adf0bc71655f1

  • SHA1

    328a8793323f11c1d0c5f3ddedf4ae10caafb063

  • SHA256

    62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087

  • SHA512

    35c2c131a84205ecda974fc0cdf93db38184547586c28671379b13b98311289459b5b87c6c8ffa3233ccd42953d4faef47e27195ecd40011cc72cbf3b3e5af35

  • SSDEEP

    24576:pAWf/LUup7zmMl8tOKnvwYQ62jaeekMEoBmn64:pTUS2Ml8trnvwYQ62japkMEQS64

Score
10/10
blackbastadefense_evasionexecutionimpactpersistenceransomwarespywarestealer

Malware Config

Extracted

Path

C:\Program Files\instructions_read_me.txt

Family

blackbasta

Ransom Note
ATTENTION! Your network has been breached and all data was encrypted. Please contact us at: https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/ Login ID: 91ff2d86-ecd6-429f-9cfe-ef43ac53155b *!* To access .onion websites download and install Tor Browser at: https://www.torproject.org/ (Tor Browser is not related to us) *!* To restore all your PCs and get your network working again, follow these instructions: - Any attempts to modify, decrypt or rename the files will lead to its fatal corruption. It doesn't matter, who are trying to do this, either it will be your IT guys or a recovery agency. Please follow these simple rules to avoid data corruption: - Do not modify, rename or delete files. Any attempts to modify, decrypt or rename the files will lead to its fatal corruption. - Do not hire a recovery company. They can't decrypt without the key. They also don't care about your business. They believe that they are good negotiators, but it is not. They usually fail. So speak for yourself. Waiting you in a chat.
URLs

https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/

Signatures

  • Black Basta

    A ransomware family targeting Windows and Linux ESXi first seen in February 2022.

    ransomwareblackbasta
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies registry class 3 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 16 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\62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087.exe
    "C:\Users\Admin\AppData\Local\Temp\62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087.exe"
    1⤵
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1924
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2568
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c start /MAX notepad.exe c:\instructions_read_me.txt
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2736
      • C:\Windows\SysWOW64\notepad.exe
        notepad.exe c:\instructions_read_me.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1596
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files\instructions_read_me.txt
    Filesize

    1KB

    MD5

    48fd4f0bdadd9e2a934c4aef789f7e13

    SHA1

    7e5c99a356f4fac0b9e538f8a2a8927d1c0c6850

    SHA256

    f1e74dfde27137949c2352cb782ed6b2d5cf5fcd2ad6fc1f6e91f2f89649e29e

    SHA512

    17ac0d35284095eea40c68a7d1ac2fb0eb7d19b429ffc072a4b4504a8b80ba7297958cf205a176fd3c651d18f8ba01e2b41f3155715c9e20a34b474e36cc4cb2

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