Overview

overview

10

Static

static

Choir-Dire...rm.exe

windows7_x64

8

Choir-Dire...rm.exe

windows10_x64

10

Sharing

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General

  • Target

    Choir-Director-Evaluation-Form.exe

  • Size

    107.7MB

  • Sample

    210527-khdcjwwrqn

  • MD5

    e4b18058271e4c9bfc7e3759a6132437

  • SHA1

    70248c40ca94932a7f098a26ee7858bda5903d73

  • SHA256

    8a5414b7aac54f93ddaa9e57538378db7d68fd6e457770206eef46cd9371aeb1

  • SHA512

    4bf709dc7e3e32d7a694732b60150ea97b834465a8074d6b3d4acab0633d3e6f2a96d211f04c58397032bf60e8b4e172c775c95b3afe8765f8e2f1b650c6a045

Score
10/10
jupyteradwarebackdoordiscoverypersistencestealertrojan

Malware Config

Targets

    • Target

      Choir-Director-Evaluation-Form.exe

    • Size

      107.7MB

    • MD5

      e4b18058271e4c9bfc7e3759a6132437

    • SHA1

      70248c40ca94932a7f098a26ee7858bda5903d73

    • SHA256

      8a5414b7aac54f93ddaa9e57538378db7d68fd6e457770206eef46cd9371aeb1

    • SHA512

      4bf709dc7e3e32d7a694732b60150ea97b834465a8074d6b3d4acab0633d3e6f2a96d211f04c58397032bf60e8b4e172c775c95b3afe8765f8e2f1b650c6a045

    Score
    10/10
    jupyteradwarebackdoordiscoverypersistencestealertrojan

    • Jupyter, SolarMarker

      Jupyter is a backdoor and infostealer first seen in mid 2020.

      backdoortrojanstealerjupyter

    • Registers COM server for autorun

      persistence

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Registers new Print Monitor

      persistence

    • Checks computer location settings

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

    • Drops startup file

    • Loads dropped DLL

    • Checks installed software on the system

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

      discovery

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

      stealeradware

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2
T1060

Browser Extensions

1
T1176

Privilege Escalation

Defense Evasion

Modify Registry

4
T1112

Install Root Certificate

1
T1130

Credential Access

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

2
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks