Overview

overview

10

Static

static

ViJoy.bin.exe

windows7_x64

10

ViJoy.bin.exe

windows10_x64

10

Sharing

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General

  • Target

    ViJoy.bin

  • Size

    6.0MB

  • Sample

    210721-181y71wc52

  • MD5

    03051f3c44a2c8d196c95ea458b0aff4

  • SHA1

    d19a86e11cccdf978ca2d1455d7026d7879869f7

  • SHA256

    555f654fb51e632ba2cf49b865b6de5f5772ffba0229d73021a1c6a6f65dab08

  • SHA512

    883e31033107ee9f008d34e84638fca2ee085e6cc7c41a288d1663a31beac7109efe718ab7f38f682c8e01a99736e3832c539c95fd4bf25124fed4c9e9eeba46

Score
10/10
servhelperbackdoorbootkitdiscoveryexploitpersistencetrojanupx

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1

Targets

    • Target

      ViJoy.bin

    • Size

      6.0MB

    • MD5

      03051f3c44a2c8d196c95ea458b0aff4

    • SHA1

      d19a86e11cccdf978ca2d1455d7026d7879869f7

    • SHA256

      555f654fb51e632ba2cf49b865b6de5f5772ffba0229d73021a1c6a6f65dab08

    • SHA512

      883e31033107ee9f008d34e84638fca2ee085e6cc7c41a288d1663a31beac7109efe718ab7f38f682c8e01a99736e3832c539c95fd4bf25124fed4c9e9eeba46

    Score
    10/10
    servhelperbackdoorbootkitdiscoveryexploitpersistencetrojanupx

    • ServHelper

      ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

      trojanbackdoorservhelper

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Modifies RDP port number used by Windows

    • Possible privilege escalation attempt

      exploit

    • Sets DLL path for service in the registry

      persistence

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Account Manipulation

1
T1098

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

File Permissions Modification

1
T1222

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Remote Desktop Protocol

1
T1076

Collection

Exfiltration

Command and Control

Impact

Tasks