Overview

overview

10

Static

static

a563c50c5f...7d.exe

windows7_x64

10

a563c50c5f...7d.exe

windows10_x64

10

Sharing

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General

  • Target

    a563c50c5fa0fd541248acaf72cc4e7d

  • Size

    635KB

  • Sample

    210311-n5b4nrzd9e

  • MD5

    a563c50c5fa0fd541248acaf72cc4e7d

  • SHA1

    4b8c12b074e20a796071aa50dc82fe2ff755e8f6

  • SHA256

    180f82bbedb03dc29328e32e054069870a1e65078b78b2120a84c96aaed7d843

  • SHA512

    d7c4c92b3eeb8cefe6d007b7b4fd79cbec388582ca0f3708d520a2c3e432d490d2f69ce365edbc1141f13e71ac473fed74a4367b7898af68d5c1e3b4e4899479

Score
10/10
ryukdavediscoveryransomware

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = '5GqsR1ewcO'; $torlink = 'http://piesa6sapybbrz63pqmmwdzyc5fp73b3uya5cpli6pp5jpswndiu44id.onion'; function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};
URLs

http://piesa6sapybbrz63pqmmwdzyc5fp73b3uya5cpli6pp5jpswndiu44id.onion

Targets

    • Target

      a563c50c5fa0fd541248acaf72cc4e7d

    • Size

      635KB

    • MD5

      a563c50c5fa0fd541248acaf72cc4e7d

    • SHA1

      4b8c12b074e20a796071aa50dc82fe2ff755e8f6

    • SHA256

      180f82bbedb03dc29328e32e054069870a1e65078b78b2120a84c96aaed7d843

    • SHA512

      d7c4c92b3eeb8cefe6d007b7b4fd79cbec388582ca0f3708d520a2c3e432d490d2f69ce365edbc1141f13e71ac473fed74a4367b7898af68d5c1e3b4e4899479

    Score
    10/10
    ryukdavediscoveryransomware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Dave packer

      Detects executable packed with a packer named 'Dave' from the community, due to a string at the end of it.

      dave

    • Executes dropped EXE

    • Drops startup file

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Drops desktop.ini file(s)

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Permissions Modification

1
T1222

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks