Overview

overview

10

Static

static

8

3ee706f07d...a4.exe

windows10-2004-x64

10

3ee706f07d...a4.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    3ee706f07d13cb9e617eac2b4442479634ab48f11005568c739c6dcab75052a4.zip
  • Size 239KB
  • Sample260430-grfa7aey7k
  • SHA256 edb436332b3488a3aa3f16891a9204bafe3f9f2b7818e2ddc0200707c63e3eaf
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
ryukcredential_accessdiscoveryransomwarerevoked_codesignstealer

Malware Config

Extracted

Path

  • C:\users\Public\RyukReadMe.html

  • ryuk

Ransom Note

Targets

    • Target
      3ee706f07d13cb9e617eac2b4442479634ab48f11005568c739c6dcab75052a4.exe
    • Size 397KB
    • SHA256 3ee706f07d13cb9e617eac2b4442479634ab48f11005568c739c6dcab75052a4
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    credential_accessdiscoveryryukransomwarestealer

    • Family: Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Renames multiple (115) 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.

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

      credential_accessstealer

    • Executes dropped EXE

    • Modifies file permissions

      discovery
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks