Overview

overview

10

Static

static

3

JaffaCakes...74.exe

windows7-x64

10

JaffaCakes...74.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    JaffaCakes118_8c0afd40d1eaf4dbd91bacaf28849074

  • Size

    644KB

  • Sample

    250329-vpczyazygw

  • MD5

    8c0afd40d1eaf4dbd91bacaf28849074

  • SHA1

    2f40d165f1d3961237197f7e454b5fb52c74fad4

  • SHA256

    16c93fc1a426856cff62d7a99f8ae5e41442222861a72ca0ede3ecbaf54642e8

  • SHA512

    e0e54076624aa6f318401d6673f2cdba1aa1134bfe7d3bbcc557dc2aca9113189dcee4e06cbc99bec05cbebc3a5bf151f32904d737a2ef9335e35f69872b4097

  • SSDEEP

    12288:Q6onxOp8FySpE5zvIdtU+YmefT9/mqOplf2AQNWxgqFjj:Ewp8DozAdO98fplf2MJ

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_8c0afd40d1eaf4dbd91bacaf28849074

    • Size

      644KB

    • MD5

      8c0afd40d1eaf4dbd91bacaf28849074

    • SHA1

      2f40d165f1d3961237197f7e454b5fb52c74fad4

    • SHA256

      16c93fc1a426856cff62d7a99f8ae5e41442222861a72ca0ede3ecbaf54642e8

    • SHA512

      e0e54076624aa6f318401d6673f2cdba1aa1134bfe7d3bbcc557dc2aca9113189dcee4e06cbc99bec05cbebc3a5bf151f32904d737a2ef9335e35f69872b4097

    • SSDEEP

      12288:Q6onxOp8FySpE5zvIdtU+YmefT9/mqOplf2AQNWxgqFjj:Ewp8DozAdO98fplf2MJ

    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

    • 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 autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

1
T1091

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

Replication Through Removable Media

1
T1091

Collection

Command and Control

Exfiltration

Impact

Tasks

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