Overview

overview

10

Static

static

e693ba3857...2d.exe

windows7_x64

10

e693ba3857...2d.exe

windows10-2004_x64

8

Sharing

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General

  • Target

    e693ba3857027dd1c9e234dcadd35e76a96b2fa9b34a618f2b4a2b3b9403cf2d

  • Size

    7.4MB

  • Sample

    220419-dhv4haghek

  • MD5

    1cf5dd5e5b0074edcba997bb52ca95ca

  • SHA1

    aa64c566f081986367b805ce3093f188b7fa9af8

  • SHA256

    e693ba3857027dd1c9e234dcadd35e76a96b2fa9b34a618f2b4a2b3b9403cf2d

  • SHA512

    7373691c3a14fe7c4bfcbee3c9e0cf671a06ebe2ddfb011bca34e71edf2593cdd47ec08d32d0d46974da5a40ddf1d86c033574612756a308507dd9e7796c8134

Score
10/10
zhendiscoveryevasionexploitpersistenceransomwarespywarestealer

Malware Config

Targets

    • Target

      e693ba3857027dd1c9e234dcadd35e76a96b2fa9b34a618f2b4a2b3b9403cf2d

    • Size

      7.4MB

    • MD5

      1cf5dd5e5b0074edcba997bb52ca95ca

    • SHA1

      aa64c566f081986367b805ce3093f188b7fa9af8

    • SHA256

      e693ba3857027dd1c9e234dcadd35e76a96b2fa9b34a618f2b4a2b3b9403cf2d

    • SHA512

      7373691c3a14fe7c4bfcbee3c9e0cf671a06ebe2ddfb011bca34e71edf2593cdd47ec08d32d0d46974da5a40ddf1d86c033574612756a308507dd9e7796c8134

    Score
    10/10
    zhendiscoveryevasionexploitpersistenceransomwarespywarestealer

    • Deletes Windows Defender Definitions

      Uses mpcmdrun utility to delete all AV definitions.

      evasion

    • Zhen Ransomware

      First seen in September 2020. Drops ransomnote as .ini file.

      ransomwarezhen

    • Executes dropped EXE

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

      ransomware

    • Possible privilege escalation attempt

      exploit

    • Checks computer location settings

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

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • 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

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

1
T1059

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Impair Defenses

1
T1562

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Defacement

1
T1491

Tasks