Overview

overview

10

Static

static

3

JaffaCakes...37.exe

windows7-x64

10

JaffaCakes...37.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    JaffaCakes118_90de3ac81eff9a54a44eb7aca77d1737

  • Size

    1004KB

  • Sample

    250329-wxx6hsznt8

  • MD5

    90de3ac81eff9a54a44eb7aca77d1737

  • SHA1

    ac1c543397b0f5f542302adb4103781bd174df21

  • SHA256

    886a6b6fdd213f3b992336fccc96d5afdf409a859575e1a689c4cf506bbe074a

  • SHA512

    a557c9a5e5844223a45eb2bbfe27a189b7dfb44371fd82103f6c311ca312c2ddba84744e1fcfcac7ed0fed5e65e27088999134ae5cebac21645781a764f40eaa

  • SSDEEP

    6144:/8XXRUw9Oz5+iUU03pej1YpTYzOb0kLXhlJFTaLTGu0yvHcr+JB8aU:knRy+ZyYpaCDJFuPyAHcqrU

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_90de3ac81eff9a54a44eb7aca77d1737

    • Size

      1004KB

    • MD5

      90de3ac81eff9a54a44eb7aca77d1737

    • SHA1

      ac1c543397b0f5f542302adb4103781bd174df21

    • SHA256

      886a6b6fdd213f3b992336fccc96d5afdf409a859575e1a689c4cf506bbe074a

    • SHA512

      a557c9a5e5844223a45eb2bbfe27a189b7dfb44371fd82103f6c311ca312c2ddba84744e1fcfcac7ed0fed5e65e27088999134ae5cebac21645781a764f40eaa

    • SSDEEP

      6144:/8XXRUw9Oz5+iUU03pej1YpTYzOb0kLXhlJFTaLTGu0yvHcr+JB8aU:knRy+ZyYpaCDJFuPyAHcqrU

    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