Overview

overview

10

Static

static

3

JaffaCakes...5c.exe

windows7-x64

10

JaffaCakes...5c.exe

windows10-2004-x64

10

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General

  • Target

    JaffaCakes118_90c1d920f8f1539dd7b4c70bd3a8cc5c

  • Size

    560KB

  • Sample

    250329-wwzmyszkz9

  • MD5

    90c1d920f8f1539dd7b4c70bd3a8cc5c

  • SHA1

    a978fc09bab91af1cafa95e6471e657074d25923

  • SHA256

    717c2978702de3a7f235ab5c1de7bcb7a2519ec1bdf366a9e13c46f12485fd5d

  • SHA512

    f60acf5520ac1212404b24d7c959e71b655d73b885769d0634181340ce536b948669768558acc683843e494d05c1a0deead356816d3c50cb3ab17942d4c527f2

  • SSDEEP

    12288:IpUJ3r6YkVwJgNnSykgb9cqWnw4q6ZmFhqsYn0uPTF:IpUNr6YkVRFkgbeqeo68Fhqd1bF

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_90c1d920f8f1539dd7b4c70bd3a8cc5c

    • Size

      560KB

    • MD5

      90c1d920f8f1539dd7b4c70bd3a8cc5c

    • SHA1

      a978fc09bab91af1cafa95e6471e657074d25923

    • SHA256

      717c2978702de3a7f235ab5c1de7bcb7a2519ec1bdf366a9e13c46f12485fd5d

    • SHA512

      f60acf5520ac1212404b24d7c959e71b655d73b885769d0634181340ce536b948669768558acc683843e494d05c1a0deead356816d3c50cb3ab17942d4c527f2

    • SSDEEP

      12288:IpUJ3r6YkVwJgNnSykgb9cqWnw4q6ZmFhqsYn0uPTF:IpUNr6YkVRFkgbeqeo68Fhqd1bF

    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