Overview

overview

10

Static

static

3

2024-09-10...uk.exe

windows7-x64

10

2024-09-10...uk.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    2024-09-10_e7981e5d16518ce4a1e70974e676b0f7_ryuk

  • Size

    436KB

  • Sample

    240910-fcvxnaxdkm

  • MD5

    e7981e5d16518ce4a1e70974e676b0f7

  • SHA1

    562f99603eccfcc94e7328cf8f72d26301dca416

  • SHA256

    f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f

  • SHA512

    98f9842718275de8dd67a354121885d14506de52669ea2e4fc927ec3d292f9f405d23e45be19ae1ec875cecab8cfa532a77a1e6291f8ab869e8de30c98682ab9

  • SSDEEP

    1536:gnAgQXhJCxVUzRTRf+TlNXQdDYp3d7Ye5gtFTEllM75wXwtQyHsWSJcdH4JNMwoc:H/yDYslp3dEe2FHQQIYH4/MIq

Score
10/10
ryukcredential_accessdiscoveryransomwarespywarestealer

Malware Config

Targets

    • Target

      2024-09-10_e7981e5d16518ce4a1e70974e676b0f7_ryuk

    • Size

      436KB

    • MD5

      e7981e5d16518ce4a1e70974e676b0f7

    • SHA1

      562f99603eccfcc94e7328cf8f72d26301dca416

    • SHA256

      f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f

    • SHA512

      98f9842718275de8dd67a354121885d14506de52669ea2e4fc927ec3d292f9f405d23e45be19ae1ec875cecab8cfa532a77a1e6291f8ab869e8de30c98682ab9

    • SSDEEP

      1536:gnAgQXhJCxVUzRTRf+TlNXQdDYp3d7Ye5gtFTEllM75wXwtQyHsWSJcdH4JNMwoc:H/yDYslp3dEe2FHQQIYH4/MIq

    Score
    10/10
    ryukcredential_accessdiscoveryransomwarestealerspyware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

      credential_accessstealer

    • Renames multiple (8091) files with added filename extension

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

      ransomware

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

      credential_accessstealer

    • Drops startup file

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

File and Directory Permissions Modification

1
T1222

Credential Access

Credentials from Password Stores

2
T1555

Credentials from Web Browsers

1
T1555.003

Windows Credential Manager

1
T1555.004

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Browser Information Discovery

1
T1217

Peripheral Device Discovery

1
T1120

Query Registry

1
T1012

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks