Overview

overview

10

Static

static

1

HK SEMI CO...pdf.js

windows7-x64

10

HK SEMI CO...pdf.js

windows10-2004-x64

10

Sharing

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General

  • Target

    HK SEMI CORPORATION CO,,Ltd.pdf.js

  • Size

    3.6MB

  • Sample

    230222-m327zscg4v

  • MD5

    7c1b866122a8e513808e32caed12c6f6

  • SHA1

    fe31d17019b1faf1fa5a8c219bfbf1290d8c3423

  • SHA256

    6d492fc9630da1e571ef9953241ad9a594b7b702d7dfa033b06941d3b7f9f201

  • SHA512

    cd94ea8344923c1f5b007e10226ebc1bb7e1d1a1fcc0fdb0c3c14478ed5d7c78f9f1b1ac38aaa90567e49be5a5f9df320c68ad8de925620c82c5f9dd825de948

  • SSDEEP

    3072:HOcWWS20PtmUSfibfWZ17T7VE+NFlC7l75eGlGE32qXaj1slgD71dwMbb9rp6D9T:MG1SeC

Score
10/10
vjw0rmwshratpersistencetrojanworm

Malware Config

Extracted

Family

wshrat

C2

http://45.139.105.174:1604

Targets

    • Target

      HK SEMI CORPORATION CO,,Ltd.pdf.js

    • Size

      3.6MB

    • MD5

      7c1b866122a8e513808e32caed12c6f6

    • SHA1

      fe31d17019b1faf1fa5a8c219bfbf1290d8c3423

    • SHA256

      6d492fc9630da1e571ef9953241ad9a594b7b702d7dfa033b06941d3b7f9f201

    • SHA512

      cd94ea8344923c1f5b007e10226ebc1bb7e1d1a1fcc0fdb0c3c14478ed5d7c78f9f1b1ac38aaa90567e49be5a5f9df320c68ad8de925620c82c5f9dd825de948

    • SSDEEP

      3072:HOcWWS20PtmUSfibfWZ17T7VE+NFlC7l75eGlGE32qXaj1slgD71dwMbb9rp6D9T:MG1SeC

    Score
    10/10
    vjw0rmwshratpersistencetrojanworm

    • Vjw0rm

      Vjw0rm is a remote access trojan written in JavaScript.

      trojanwormvjw0rm

    • WSHRAT

      WSHRAT is a variant of Houdini worm and has vbs and js variants.

      trojanwshrat

    • Blocklisted process makes network request

    • Checks computer location settings

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

    • Drops startup file

    • Adds Run key to start application

      persistence
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks