Overview

overview

10

Static

static

3

JaffaCakes...9b.exe

windows7-x64

10

JaffaCakes...9b.exe

windows10-2004-x64

10

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General

  • Target

    JaffaCakes118_8ef2d07270653f6f7e52dd62aaed819b

  • Size

    564KB

  • Sample

    250329-wcbf1s1xdt

  • MD5

    8ef2d07270653f6f7e52dd62aaed819b

  • SHA1

    fd629389614f86b65d384255c03591171226a622

  • SHA256

    8c97f3444942fcd1aa8d2e9b343b6168d3743302b1c8625d22679fc18490fecc

  • SHA512

    b341b943f5727d244ec161f26dfa1d3899eb67a6c42148f1cbaeeb35f1720d72d721200a6aab7279192e5f0fa0ecd56cf089bba0f0a8a847b088cfdde28afa71

  • SSDEEP

    12288:cpUJ3r6YkVwJgNnSykgb9cqWnw4q6ZmFhqs0u:cpUNr6YkVRFkgbeqeo68FhqN

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_8ef2d07270653f6f7e52dd62aaed819b

    • Size

      564KB

    • MD5

      8ef2d07270653f6f7e52dd62aaed819b

    • SHA1

      fd629389614f86b65d384255c03591171226a622

    • SHA256

      8c97f3444942fcd1aa8d2e9b343b6168d3743302b1c8625d22679fc18490fecc

    • SHA512

      b341b943f5727d244ec161f26dfa1d3899eb67a6c42148f1cbaeeb35f1720d72d721200a6aab7279192e5f0fa0ecd56cf089bba0f0a8a847b088cfdde28afa71

    • SSDEEP

      12288:cpUJ3r6YkVwJgNnSykgb9cqWnw4q6ZmFhqs0u:cpUNr6YkVRFkgbeqeo68FhqN

    Score
    10/10
    pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

    • 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

    • 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

    • 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

4
T1547

Active Setup

1
T1547.014

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

4
T1547

Active Setup

1
T1547.014

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

6
T1112

Credential Access

Discovery

Query Registry

2
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