Overview

overview

10

Static

static

3

JaffaCakes...c0.exe

windows7-x64

10

JaffaCakes...c0.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    JaffaCakes118_97a54819f342bcc3d614c86f790743c0

  • Size

    1016KB

  • Sample

    250329-y3v98atnz3

  • MD5

    97a54819f342bcc3d614c86f790743c0

  • SHA1

    20a889572aa31106426a58a6580293980d049c9b

  • SHA256

    dbd996d068c1cc16b0061d1bae1a735160b9642a197e67a2396e6a94add2dc53

  • SHA512

    8db09b16722c38ec652eb7879fc7b8ac0973e6c3a03014da64431484698c360e91ac4e7711c6533cd4a9ffbba23e8c3ccd791456acdda231b194e72dc9e34f2e

  • SSDEEP

    6144:B7IXsL0tvrSVz1DnemeYbpsnEf78AoXh6KkiD0OofzA+/VygHU:B7IXsgtvm1De5YlOx6lzBH46U

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_97a54819f342bcc3d614c86f790743c0

    • Size

      1016KB

    • MD5

      97a54819f342bcc3d614c86f790743c0

    • SHA1

      20a889572aa31106426a58a6580293980d049c9b

    • SHA256

      dbd996d068c1cc16b0061d1bae1a735160b9642a197e67a2396e6a94add2dc53

    • SHA512

      8db09b16722c38ec652eb7879fc7b8ac0973e6c3a03014da64431484698c360e91ac4e7711c6533cd4a9ffbba23e8c3ccd791456acdda231b194e72dc9e34f2e

    • SSDEEP

      6144:B7IXsL0tvrSVz1DnemeYbpsnEf78AoXh6KkiD0OofzA+/VygHU:B7IXsgtvm1De5YlOx6lzBH46U

    Score
    10/10
    pykspadefense_evasiondiscoverypersistencetrojanwormprivilege_escalation

    • Modifies WinLogon for persistence

      persistence

    • Pykspa

      Pykspa is a worm spreads via Skype uses DGA and it's written in C++.

      wormpykspa

    • Pykspa family

      pykspa

    • UAC bypass

      defense_evasiontrojan

    • Detect Pykspa worm

      worm

    • Adds policy Run key to start application

      persistence

    • Blocklisted process makes network request

    • Disables RegEdit via registry modification

      defense_evasion

    • Checks computer location settings

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

    • Executes dropped EXE

    • Impair Defenses: Safe Mode Boot

      defense_evasion

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      defense_evasiontrojan

    • Hijack Execution Flow: Executable Installer File Permissions Weakness

      Possible Turn off User Account Control's privilege elevation for standard users.

      defense_evasionpersistenceprivilege_escalation

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

1
T1547.004

Hijack Execution Flow

1
T1574

Executable Installer File Permissions Weakness

1
T1574.005

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

1
T1547.004

Hijack Execution Flow

1
T1574

Executable Installer File Permissions Weakness

1
T1574.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Hijack Execution Flow

1
T1574

Executable Installer File Permissions Weakness

1
T1574.005

Impair Defenses

2
T1562

Disable or Modify Tools

1
T1562.001

Safe Mode Boot

1
T1562.009

Modify Registry

5
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks