Overview

overview

10

Static

static

3

instZIP.65...pc.exe

windows10-2004-x64

10

instZIP.65...pc.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    ac8384171024315f161073bcf032e6358c9a1e0678190517e7520ba8be0ae684
  • Size 8.2MB
  • Sample260511-mn9crafv51
  • SHA256 ac8384171024315f161073bcf032e6358c9a1e0678190517e7520ba8be0ae684
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
plusdropapt41aptbackdoordefense_evasiondiscoveryexecutionexploitpersistencetrojan

Malware Config

Targets

    • Target
      instZIP.65763.x64.pc.exe
    • Size 68.4MB
    • SHA256 b6e63f12765b39ecbbb59f849fe85502625abc23169be98b17b83e5cc7bb4589
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    apt41aptbackdoordefense_evasiondiscoveryexecutionplusdroppersistencetrojanexploit

    • Detects Plusdrop Payload

      backdooraptapt41

    • Family: Plusdrop, toughprogress

      Plusdrop is a backdoor used by APT41 in Toughprogress campaign that abuses Google Calendar events as its C2.

      backdoorplusdrop

    • UAC bypass

      defense_evasiontrojan

    • Windows security bypass

      defense_evasiontrojan

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Possible privilege escalation attempt

      exploit

    • Checks computer location settings

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

    • Disables service(s)

      defense_evasionexecution

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Adds Run key to start application

      persistence

    • Indicator Removal: Clear Persistence

      Clear artifacts associated with previously established persistence like scheduletasks on a host.

      defense_evasion

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

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

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

File and Directory Permissions Modification

1
T1222

Impair Defenses

2
T1562

Disable or Modify Tools

2
T1562.001

Indicator Removal

1
T1070

Clear Persistence

1
T1070.009

Modify Registry

4
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

1
T1489

Tasks