Overview

overview

10

Static

static

3

7737fb5fa7...9a.exe

windows7-x64

10

7737fb5fa7...9a.exe

windows10-2004-x64

10

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General

  • Target

    c818a453307f13e6f68041b41ce80c1c2187fc804148330cdc26db415db7df47

  • Size

    17.4MB

  • Sample

    240711-j38szszdlf

  • MD5

    52e2721b446425382cba3a1fca1163d4

  • SHA1

    4692710b170ed30ca1e2f04c93a5cca9d05e7507

  • SHA256

    c818a453307f13e6f68041b41ce80c1c2187fc804148330cdc26db415db7df47

  • SHA512

    d8d032bcc379d8bda805860702129a39ef25ac5994375b4453731da61b329129801b967b06b479c83583193b5c9ba20e6754e362e4078e15fc494fcae5181c58

  • SSDEEP

    393216:ACSp0u8nIkFIrHbfv1wSNqyPnUOi1c1ewtG1oAOAu03XmYcO4FZm:ACiCmzJwFyPCCAr3XVcbjm

Score
10/10
chaosdefense_evasionevasionexecutionimpactpersistencepyinstallerransomwarespywarestealer

Malware Config

Targets

    • Target

      7737fb5fa7440206dbbd7dbeb8222a2851caf6210005e37d6d5d765081940e9a

    • Size

      17.5MB

    • MD5

      fe194bd31f2388a09bbef24ddaa212ce

    • SHA1

      cb01c1cb0a2fc192c28b3d7864e739d9d8575e08

    • SHA256

      7737fb5fa7440206dbbd7dbeb8222a2851caf6210005e37d6d5d765081940e9a

    • SHA512

      c682844cbe5899465e6ba14304a7d6cdfabb41c2f31c94e0407af953cf9889ed70da6a27615d868e2e9fa7f3711db488741c3cd68789a5ed7ac4fb1a60478054

    • SSDEEP

      393216:2VVC+w99uPfkiyV4wqWisNWhQkUS9O6OKpsSH+sWTF:2m/fiyyFWFN7kJOKpsk+sWJ

    Score
    10/10
    chaosdefense_evasionevasionexecutionimpactpersistencepyinstallerransomwarespywarestealer

    • Chaos

      Ransomware family first seen in June 2021.

      ransomwarechaos

    • Chaos Ransomware

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • Renames multiple (180) files with added filename extension

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

      ransomware

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

      ransomware

    • Disables Task Manager via registry modification

      evasion

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Accesses cryptocurrency files/wallets, possible credential harvesting

      spyware

    • Adds Run key to start application

      persistence

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Windows Management Instrumentation

1
T1047

Command and Scripting Interpreter

1
T1059

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Indicator Removal

3
T1070

File Deletion

3
T1070.004

Modify Registry

2
T1112

Direct Volume Access

1
T1006

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Data from Local System

2
T1005

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Inhibit System Recovery

4
T1490

Defacement

1
T1491

Resource Development

Reconnaissance

Tasks