Overview

overview

9

Static

static

7

muyesi.exe

windows7_x64

9

muyesi.exe

windows10_x64

9

Sharing

Copy URL
Twitter E-mail

General

  • Target

    muyesi.exe

  • Size

    3.5MB

  • Sample

    220123-nmmyssgab3

  • MD5

    65c50d3c08ea164e7919b8b867d5d186

  • SHA1

    a4d7ef571989369d9776cd53d6c1df6b70fe4631

  • SHA256

    89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

  • SHA512

    bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Score
9/10
evasionthemidatrojan

Malware Config

Targets

    • Target

      muyesi.exe

    • Size

      3.5MB

    • MD5

      65c50d3c08ea164e7919b8b867d5d186

    • SHA1

      a4d7ef571989369d9776cd53d6c1df6b70fe4631

    • SHA256

      89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

    • SHA512

      bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

    Score
    9/10
    evasionthemidatrojan

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

      evasion

    • Executes dropped EXE

    • Checks BIOS information in registry

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

    • Drops startup file

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

      themida

    • Checks whether UAC is enabled

      evasiontrojan

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Discovery

Query Registry

2
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks