Overview

overview

10

Static

static

b6a77965f9...a2.exe

windows7_x64

10

b6a77965f9...a2.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    b6a77965f94dfc6f0ed0a3465e8d17e998328a9659ef860fbe2396bb0014f8a2

  • Size

    196KB

  • Sample

    220220-depgjshabn

  • MD5

    35fb90e465df48871ee78df492fe22de

  • SHA1

    ddfba2e525968f6aedf050613f32b124b13f776a

  • SHA256

    b6a77965f94dfc6f0ed0a3465e8d17e998328a9659ef860fbe2396bb0014f8a2

  • SHA512

    60511d000df87164627fb6053049e82be0833e60a8b8a7ae30e93084e4293e250f1a7b2a4eaf3d875408a304e845ae548ff2cd68d6f604090cdc5be3d168d5f7

Score
10/10
ryukdiscoverypersistenceransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

C:\Users\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Targets

    • Target

      b6a77965f94dfc6f0ed0a3465e8d17e998328a9659ef860fbe2396bb0014f8a2

    • Size

      196KB

    • MD5

      35fb90e465df48871ee78df492fe22de

    • SHA1

      ddfba2e525968f6aedf050613f32b124b13f776a

    • SHA256

      b6a77965f94dfc6f0ed0a3465e8d17e998328a9659ef860fbe2396bb0014f8a2

    • SHA512

      60511d000df87164627fb6053049e82be0833e60a8b8a7ae30e93084e4293e250f1a7b2a4eaf3d875408a304e845ae548ff2cd68d6f604090cdc5be3d168d5f7

    Score
    10/10
    ryukdiscoverypersistenceransomware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomware

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Adds Run key to start application

      persistence
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

File Deletion

2
T1107

File Permissions Modification

1
T1222

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2
T1490

Tasks