Overview

overview

10

Static

static

3

JaffaCakes...41.exe

windows7-x64

10

JaffaCakes...41.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    JaffaCakes118_97a06d4c34869003ce06d22cf844ee41

  • Size

    600KB

  • Sample

    250329-y3pgns1yes

  • MD5

    97a06d4c34869003ce06d22cf844ee41

  • SHA1

    1ec4347b82f3cc1b9624f4e6a68047a8045a7fc0

  • SHA256

    839e4463d38910e7b4b6548985a95711dc11371a6a94f36716b0d222260ae275

  • SHA512

    3f2251920964cb7e86e1ccbbb06ec138a770493b9ce1a0c0fc37fba4e55023e774db75ad83c140bd816248934822b6c20b7527bc3058462c173999c72e149930

  • SSDEEP

    12288:e2iwn/ND7S3xI66S/H3UyKxWn2hJ+MRmhhhAR:e213Sed0Xjh4

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_97a06d4c34869003ce06d22cf844ee41

    • Size

      600KB

    • MD5

      97a06d4c34869003ce06d22cf844ee41

    • SHA1

      1ec4347b82f3cc1b9624f4e6a68047a8045a7fc0

    • SHA256

      839e4463d38910e7b4b6548985a95711dc11371a6a94f36716b0d222260ae275

    • SHA512

      3f2251920964cb7e86e1ccbbb06ec138a770493b9ce1a0c0fc37fba4e55023e774db75ad83c140bd816248934822b6c20b7527bc3058462c173999c72e149930

    • SSDEEP

      12288:e2iwn/ND7S3xI66S/H3UyKxWn2hJ+MRmhhhAR:e213Sed0Xjh4

    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

    • 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