Overview

overview

10

Static

static

7

Sewi.exe

windows10-2004-x64

10

Sewi.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Sewi.exe
  • Size 4.6MB
  • Sample260708-1cm72aat8v
  • SHA256 345ab938bcc8491cf079c29cd129e36467f6fa71817245caf3052265899f91c4
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwaredefense_evasiondiscoverypersistenceransomwarespywarethemidatrojan

Malware Config

Targets

    • Target
      Sewi.exe
    • Size 4.6MB
    • SHA256 345ab938bcc8491cf079c29cd129e36467f6fa71817245caf3052265899f91c4
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoverypersistencethemidatrojanadwareransomwarespyware

    • Modifies visibility of hidden/system files in Explorer

      defense_evasion

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      defense_evasion

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

      persistence

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

      persistence

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

      themida

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      defense_evasiontrojan

    • Enumerates connected drives

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3
T1547

Active Setup

1
T1547.014

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Active Setup

1
T1547.014

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Defense Evasion

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

5
T1112

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

6
T1012

System Information Discovery

6
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Virtualization/Sandbox Evasion

1
T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks