Overview

overview

10

Static

static

3

PolyRansom.exe

windows7-x64

10

PolyRansom.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    PolyRansom.exe

  • Size

    220KB

  • Sample

    241121-b16a3sxpa1

  • MD5

    3ed3fb296a477156bc51aba43d825fc0

  • SHA1

    9caa5c658b1a88fee149893d3a00b34a8bb8a1a6

  • SHA256

    1898f2cae1e3824cb0f7fd5368171a33aba179e63501e480b4da9ea05ebf0423

  • SHA512

    dc3d6e409cee4d54f48d1a25912243d07e2f800578c8e0e348ce515a047ecf5fa3089b46284e0956bbced345957a000eecdc082e6f3060971759d70a14c1c97e

  • SSDEEP

    3072:EJv/3Ppzq+M4Lh5VWK5qlYRV+hvuFiweXXbGgL90v5mq33Z3:8hzEA5GlYMWFBeXvx0c+3

Score
10/10
discoveryevasionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target

      PolyRansom.exe

    • Size

      220KB

    • MD5

      3ed3fb296a477156bc51aba43d825fc0

    • SHA1

      9caa5c658b1a88fee149893d3a00b34a8bb8a1a6

    • SHA256

      1898f2cae1e3824cb0f7fd5368171a33aba179e63501e480b4da9ea05ebf0423

    • SHA512

      dc3d6e409cee4d54f48d1a25912243d07e2f800578c8e0e348ce515a047ecf5fa3089b46284e0956bbced345957a000eecdc082e6f3060971759d70a14c1c97e

    • SSDEEP

      3072:EJv/3Ppzq+M4Lh5VWK5qlYRV+hvuFiweXXbGgL90v5mq33Z3:8hzEA5GlYMWFBeXvx0c+3

    Score
    10/10
    discoveryevasionpersistenceransomwarespywarestealertrojan

    • Modifies visibility of file extensions in Explorer

      evasion

    • UAC bypass

      evasiontrojan

    • Renames multiple (52) files with added filename extension

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

      ransomware

    • Checks computer location settings

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

    • Deletes itself

    • 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

    • Adds Run key to start application

      persistence
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

4
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

2
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