Overview

overview

10

Static

static

3

2024-06-03...uk.exe

windows7-x64

10

2024-06-03...uk.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    2024-06-03_5496313b83ccce9a11fd94c70da68ace_ryuk

  • Size

    127KB

  • Sample

    240603-nn7dtsec62

  • MD5

    5496313b83ccce9a11fd94c70da68ace

  • SHA1

    62a643f171d81511912f60197f062f6b1e79bab9

  • SHA256

    8862b060db997bc9077e3bece06529c1c116af379985f6138a07ab5fde61b54c

  • SHA512

    0015d7342d3ae7c247bab7e7a3489b5887562c6f93e36f7483f9f2910e060680cfbd84c51df94d1bb4ba62b4d86d1382023f19e0fd1308f56bea050bcb086732

  • SSDEEP

    3072:3jdVRK8n0oJ6RlWPSuIZuQqEbkPnZCX/VvCN:zdVw80oJ6RGSuIZP1EN

Score
10/10
ryukdiscoveryransomware

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Targets

    • Target

      2024-06-03_5496313b83ccce9a11fd94c70da68ace_ryuk

    • Size

      127KB

    • MD5

      5496313b83ccce9a11fd94c70da68ace

    • SHA1

      62a643f171d81511912f60197f062f6b1e79bab9

    • SHA256

      8862b060db997bc9077e3bece06529c1c116af379985f6138a07ab5fde61b54c

    • SHA512

      0015d7342d3ae7c247bab7e7a3489b5887562c6f93e36f7483f9f2910e060680cfbd84c51df94d1bb4ba62b4d86d1382023f19e0fd1308f56bea050bcb086732

    • SSDEEP

      3072:3jdVRK8n0oJ6RlWPSuIZuQqEbkPnZCX/VvCN:zdVw80oJ6RGSuIZP1EN

    Score
    10/10
    ryukdiscoveryransomware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Renames multiple (4781) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Drops desktop.ini file(s)

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

1
T1222

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks