Overview

overview

10

Static

static

4fa02afd_b...is.exe

windows7_x64

10

4fa02afd_b...is.exe

windows10_x64

10

Sharing

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General

  • Target

    4fa02afd_by_Libranalysis

  • Size

    622KB

  • Sample

    210505-4km3lmyc42

  • MD5

    4fa02afd5bbc31e0885d4581d151c26c

  • SHA1

    c7ef6fddc1b48820b54cf1b47fc0822ad01bcefe

  • SHA256

    d407b05c01f4fa48b2fed39737c3850961e2df38e4e76e1af6482770bc77a1de

  • SHA512

    8e79a723894cc7c9c22c29b2f222dad56a24b26ec8d34ca74b0cb05361a1ee2d12b5aea1037552e87ada5c456600457c17361dbe5a4e700e304d735e8a349d3f

Score
10/10
evasionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target

      4fa02afd_by_Libranalysis

    • Size

      622KB

    • MD5

      4fa02afd5bbc31e0885d4581d151c26c

    • SHA1

      c7ef6fddc1b48820b54cf1b47fc0822ad01bcefe

    • SHA256

      d407b05c01f4fa48b2fed39737c3850961e2df38e4e76e1af6482770bc77a1de

    • SHA512

      8e79a723894cc7c9c22c29b2f222dad56a24b26ec8d34ca74b0cb05361a1ee2d12b5aea1037552e87ada5c456600457c17361dbe5a4e700e304d735e8a349d3f

    Score
    10/10
    evasionpersistenceransomwarespywarestealertrojan

    • Modifies WinLogon for persistence

      persistence

    • Modifies visibility of file extensions in Explorer

      evasion

    • UAC bypass

      evasiontrojan

    • Executes dropped EXE

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

      ransomware

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • 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

    • Checks whether UAC is enabled

      evasiontrojan

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Hidden Files and Directories

1
T1158

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Modify Registry

6
T1112

Hidden Files and Directories

1
T1158

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Tasks