chaos | 18888fdc50df5f29587b1c83cb5a217d4837f5fb31b74b010e2337de4b5da988 | Triage

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Overview

overview

Static

static

FnClient.exe

windows7-x64

FnClient.exe

windows10-2004-x64

Sharing

General

Target

FnClient.exe
Size

1.6MB
Sample

241215-p33vmawpbl
MD5

794aff3545f0ea50584adc40dd2f0896
SHA1

6130d56bf9ba1cbe320f0b24141b0c9491584d3f
SHA256

18888fdc50df5f29587b1c83cb5a217d4837f5fb31b74b010e2337de4b5da988
SHA512

d7d9ca25f7535f10232b715ef5662f7316c512dc7da1036d3a31e77922fcaa30e5066fcf7142c743147e2d9aebdbf778be0390512a6f397c692118d7f11f1239
SSDEEP

12288:ofUX9SOQjN9wr5jpvkP3bap3WUkv9wO4ngeA4EoELzXKlfGba5hvMNGcxzY5Sqax:hAbIfIgJGRg85sPDr/VkJ4UB

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Static task

static1

3 signatures

Behavioral task

behavioral1

Sample

FnClient.exe

Resource

win7-20240903-en

chaos defense_evasion evasion execution impact ransomware spyware stealer

windows7-x64

20 signatures

150 seconds

Behavioral task

behavioral2

Sample

FnClient.exe

Resource

win10v2004-20241007-en

chaos defense_evasion evasion execution impact ransomware spyware stealer

windows10-2004-x64

23 signatures

150 seconds

Malware Config

Targets

- Target
  
  FnClient.exe
- Size
  
  1.6MB
- MD5
  
  794aff3545f0ea50584adc40dd2f0896
- SHA1
  
  6130d56bf9ba1cbe320f0b24141b0c9491584d3f
- SHA256
  
  18888fdc50df5f29587b1c83cb5a217d4837f5fb31b74b010e2337de4b5da988
- SHA512
  
  d7d9ca25f7535f10232b715ef5662f7316c512dc7da1036d3a31e77922fcaa30e5066fcf7142c743147e2d9aebdbf778be0390512a6f397c692118d7f11f1239
- SSDEEP
  
  12288:ofUX9SOQjN9wr5jpvkP3bap3WUkv9wO4ngeA4EoELzXKlfGba5hvMNGcxzY5Sqax:hAbIfIgJGRg85sPDr/VkJ4UB
Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer
- Chaos
  Ransomware family first seen in June 2021.
  ransomware chaos
- Chaos Ransomware
- Chaos family
  chaos
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware defense_evasion impact execution
- Modifies boot configuration data using bcdedit
  ransomware evasion
- Deletes backup catalog
  Uses wbadmin.exe to inhibit system recovery.
  ransomware
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Drops startup file
- Executes dropped EXE
- 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)
- Sets desktop wallpaper using registry
  ransomware
behavioral1 behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

Windows Management Instrumentation

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

Indicator Removal

File Deletion

Modify Registry

Credential Access

Credentials from Password Stores

Credentials from Web Browsers

Unsecured Credentials

Credentials In Files

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Data from Local System

Command and Control

Exfiltration

Impact

Defacement

Inhibit System Recovery

Tasks

static1

behavioral1

chaosdefense_evasionevasionexecutionimpactransomwarespywarestealer

behavioral2

chaosdefense_evasionevasionexecutionimpactransomwarespywarestealer

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