Overview

overview

10

Static

static

3

JaffaCakes...e5.exe

windows7-x64

10

JaffaCakes...e5.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    JaffaCakes118_8cf88a6db7a1d9f426aac73a35f11ce5

  • Size

    640KB

  • Sample

    250329-vxmjcat1b1

  • MD5

    8cf88a6db7a1d9f426aac73a35f11ce5

  • SHA1

    bb6af4301e7fdf0f8bfa9bcd1582d7162d24053a

  • SHA256

    08565ab76bff7b276fa60584ca2adc3afafbce2ac1a47bd5cb014f744370e598

  • SHA512

    95f5f9c9ce7d84374fa5472647abf2a50c8fb928e8e10912d458fa7452f031c2c4f1cb53cb2dc3f2c6dac72a2eda90d0b1001603384f49d897012bc317f46690

  • SSDEEP

    12288:DIXlgtvm1De5YlOx6lzBH46UTyxeco7pQS/L7no2aT:Dd81yMBbwyno7pQS/LBaT

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_8cf88a6db7a1d9f426aac73a35f11ce5

    • Size

      640KB

    • MD5

      8cf88a6db7a1d9f426aac73a35f11ce5

    • SHA1

      bb6af4301e7fdf0f8bfa9bcd1582d7162d24053a

    • SHA256

      08565ab76bff7b276fa60584ca2adc3afafbce2ac1a47bd5cb014f744370e598

    • SHA512

      95f5f9c9ce7d84374fa5472647abf2a50c8fb928e8e10912d458fa7452f031c2c4f1cb53cb2dc3f2c6dac72a2eda90d0b1001603384f49d897012bc317f46690

    • SSDEEP

      12288:DIXlgtvm1De5YlOx6lzBH46UTyxeco7pQS/L7no2aT:Dd81yMBbwyno7pQS/LBaT

    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

    • Blocklisted process makes network request

    • Disables RegEdit via registry modification

      defense_evasion

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • 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

1
T1562

Disable or Modify Tools

1
T1562.001

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