Overview

overview

10

Static

static

3

JaffaCakes...ef.exe

windows7-x64

10

JaffaCakes...ef.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    JaffaCakes118_8ce85fadb92eb13c1311e57baa44a3ef

  • Size

    468KB

  • Sample

    250329-vw4q8stycs

  • MD5

    8ce85fadb92eb13c1311e57baa44a3ef

  • SHA1

    1d5dc7022a42a0b2734933e4845262f6203b8c08

  • SHA256

    325b211e430cc75911dd92060d498796f9d572db4d48dea79b0ef471720400f4

  • SHA512

    3598b1d436865cb67be091b828037b56aeb67ac8df84f578de3ab2eb00b113818d1e75ae21d6cb9cf9e8ac2547d1ae3c6fc4538a6f63012fa4a7d6f886d79538

  • SSDEEP

    6144:KIXsL0tvrSVz1DnemeYbpsnEf78AoXh6KkiD0OofzA+/VygHUjaRrx:KIXsgtvm1De5YlOx6lzBH46Uj8x

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_8ce85fadb92eb13c1311e57baa44a3ef

    • Size

      468KB

    • MD5

      8ce85fadb92eb13c1311e57baa44a3ef

    • SHA1

      1d5dc7022a42a0b2734933e4845262f6203b8c08

    • SHA256

      325b211e430cc75911dd92060d498796f9d572db4d48dea79b0ef471720400f4

    • SHA512

      3598b1d436865cb67be091b828037b56aeb67ac8df84f578de3ab2eb00b113818d1e75ae21d6cb9cf9e8ac2547d1ae3c6fc4538a6f63012fa4a7d6f886d79538

    • SSDEEP

      6144:KIXsL0tvrSVz1DnemeYbpsnEf78AoXh6KkiD0OofzA+/VygHUjaRrx:KIXsgtvm1De5YlOx6lzBH46Uj8x

    Score
    10/10
    pykspawormdefense_evasiondiscoverypersistenceprivilege_escalationtrojan

    • 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

    • 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