Overview

overview

9

Static

static

3

chuev27 (2).exe

windows10-2004-x64

9

chuev27 (2).exe

windows11-21h2-x64

1

Sharing

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General

  • Target
    chuev27 (2).exe
  • Size 93KB
  • Sample260331-e8epwadz4r
  • SHA256 5b7f808d3a50e0a1c3ff476f431347c46472dcdd595b5cc7d230418fc056ca53
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
steamdefense_evasiondiscoverypersistencephishingprivilege_escalationransomwarespywaretrojan

Malware Config

Targets

    • Target
      chuev27 (2).exe
    • Size 93KB
    • SHA256 5b7f808d3a50e0a1c3ff476f431347c46472dcdd595b5cc7d230418fc056ca53
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    9/10
    steamdefense_evasiondiscoverypersistencephishingprivilege_escalationransomwarespywaretrojan

    • Renames multiple (6142) files with added filename extension

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

      ransomware

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Detected potential entity reuse from brand STEAM.

      phishingsteam

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Modify Registry

2
T1112

Subvert Trust Controls

2
T1553

Install Root Certificate

2
T1553.004

Credential Access

Discovery

Browser Information Discovery

1
T1217

Peripheral Device Discovery

1
T1120

Query Registry

5
T1012

System Information Discovery

5
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Time Discovery

1
T1124

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks