ryuk | f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f | Triage

Sharing

General

Target

f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f
Size

436KB
Sample

240908-vhgdsaxbrn
MD5

e7981e5d16518ce4a1e70974e676b0f7
SHA1

562f99603eccfcc94e7328cf8f72d26301dca416
SHA256

f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f
SHA512

98f9842718275de8dd67a354121885d14506de52669ea2e4fc927ec3d292f9f405d23e45be19ae1ec875cecab8cfa532a77a1e6291f8ab869e8de30c98682ab9
SSDEEP

1536:gnAgQXhJCxVUzRTRf+TlNXQdDYp3d7Ye5gtFTEllM75wXwtQyHsWSJcdH4JNMwoc:H/yDYslp3dEe2FHQQIYH4/MIq

Score

10^/10

ryuk credential_access discovery ransomware spyware stealer

Malware Config

Targets

- Target
  
  f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f
- Size
  
  436KB
- MD5
  
  e7981e5d16518ce4a1e70974e676b0f7
- SHA1
  
  562f99603eccfcc94e7328cf8f72d26301dca416
- SHA256
  
  f55a5b28aada98a9618a9e10f5b4a9b46e4c5f61fecc962927e2815be6aa898f
- SHA512
  
  98f9842718275de8dd67a354121885d14506de52669ea2e4fc927ec3d292f9f405d23e45be19ae1ec875cecab8cfa532a77a1e6291f8ab869e8de30c98682ab9
- SSDEEP
  
  1536:gnAgQXhJCxVUzRTRf+TlNXQdDYp3d7Ye5gtFTEllM75wXwtQyHsWSJcdH4JNMwoc:H/yDYslp3dEe2FHQQIYH4/MIq
Score

10^/10

ryuk credential_access discovery ransomware stealer spyware
- Ryuk
  Ransomware distributed via existing botnets, often Trickbot or Emotet.
  ransomware ryuk
- Credentials from Password Stores: Credentials from Web Browsers
  Malicious Access or copy of Web Browser Credential store.
  credential_access stealer
- Renames multiple (7054) 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_access stealer
- Drops startup file
- Modifies file permissions
  discovery
- Reads user/profile data of web browsers
  Infostealers often target stored browser data, which can include saved credentials etc.
  spyware stealer
- Drops desktop.ini file(s)
behavioral1 behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

File and Directory Permissions Modification

Credential Access

Credentials from Password Stores

Credentials from Web Browsers

Windows Credential Manager

Unsecured Credentials

Credentials In Files

Discovery

Browser Information Discovery

System Location Discovery

System Language Discovery

Lateral Movement

Collection

Data from Local System

Command and Control

Exfiltration

Impact

Tasks

static1

behavioral1

ryukcredential_accessdiscoveryransomwarestealer

behavioral2

ryukcredential_accessdiscoveryransomwarespywarestealer