pykspa | dbd996d068c1cc16b0061d1bae1a735160b9642a197e67a2396e6a94add2dc53

General

Target

JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe
Size

1016KB
MD5

97a54819f342bcc3d614c86f790743c0
SHA1

20a889572aa31106426a58a6580293980d049c9b
SHA256

dbd996d068c1cc16b0061d1bae1a735160b9642a197e67a2396e6a94add2dc53
SHA512

8db09b16722c38ec652eb7879fc7b8ac0973e6c3a03014da64431484698c360e91ac4e7711c6533cd4a9ffbba23e8c3ccd791456acdda231b194e72dc9e34f2e
SSDEEP

6144:B7IXsL0tvrSVz1DnemeYbpsnEf78AoXh6KkiD0OofzA+/VygHU:B7IXsgtvm1De5YlOx6lzBH46U

Score

10^/10

pykspa defense_evasion discovery persistence trojan worm

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe"	izfuneuesjp.exe

Pykspa
Pykspa is a worm spreads via Skype uses DGA and it's written in C++.
worm pykspa
Pykspa family
pykspa

UAC bypass 3 TTPs 1 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	izfuneuesjp.exe

Detect Pykspa worm 1 IoCs

worm

resource	yara_rule
behavioral1/files/0x000c000000012262-2.dat	family_pykspa

Executes dropped EXE 1 IoCs

pid	Process
2864	izfuneuesjp.exe

Loads dropped DLL 2 IoCs

pid	Process
2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe
2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	izfuneuesjp.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	izfuneuesjp.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\iqpewgdtnroavurnd.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\raaqjusjejhuqqolcl.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\cmneykjbxdcqnonldnx.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\pacupccvszzomoongrce.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\eqtmiwxrpxyonqrrlxjmf.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\vimgdsupoxzqquwxsfswqn.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\biguluqfybxicawr.exe	izfuneuesjp.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\biguluqfybxicawr.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\iqpewgdtnroavurnd.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\raaqjusjejhuqqolcl.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\cmneykjbxdcqnonldnx.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\pacupccvszzomoongrce.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\eqtmiwxrpxyonqrrlxjmf.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\vimgdsupoxzqquwxsfswqn.exe	izfuneuesjp.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe
2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 2864	2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe	30
PID 2760 wrote to memory of 2864	2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe	30
PID 2760 wrote to memory of 2864	2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe	30
PID 2760 wrote to memory of 2864	2760	JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe	30

System policy modification 1 TTPs 2 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	izfuneuesjp.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	izfuneuesjp.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_97a54819f342bcc3d614c86f790743c0.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe
  "C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe" "c:\users\admin\appdata\local\temp\jaffacakes118_97a54819f342bcc3d614c86f790743c0.exe*"
  2⤵
  - Modifies WinLogon for persistence
  - UAC bypass
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System policy modification
  PID:2864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\raaqjusjejhuqqolcl.exe

Filesize
1016KB

MD5
97a54819f342bcc3d614c86f790743c0

SHA1
20a889572aa31106426a58a6580293980d049c9b

SHA256
dbd996d068c1cc16b0061d1bae1a735160b9642a197e67a2396e6a94add2dc53

SHA512
8db09b16722c38ec652eb7879fc7b8ac0973e6c3a03014da64431484698c360e91ac4e7711c6533cd4a9ffbba23e8c3ccd791456acdda231b194e72dc9e34f2e

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\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe

Filesize
320KB

MD5
442d09d4324ca751abd44a3b4f8f5d01

SHA1
25e91e14b9c4e53c150d17ae5cafa60ebe8bac6f

SHA256
ce4c437a111f8412f8c5cd61bbefe7698850b9ba01f327212701042431897bec

SHA512
426b4029d78840d63d311d24823467545da31a6b840c27c5d5de5cd5621af5fe6b2780d8f53f6db217ab6867b8915457720628699e4b70e012eed96e6a91224d

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads