pykspa | 84372360b237f339d6a7e424e8b559baa05ef9a2b118c9f5527569ee8fb45dd1

General

Target

JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe
Size

968KB
MD5

962dc67fe9d8c2f06aa18586ce6be0de
SHA1

990418410db8507f25d40b2899fddfcc80c01721
SHA256

84372360b237f339d6a7e424e8b559baa05ef9a2b118c9f5527569ee8fb45dd1
SHA512

a32678d66e5707831bf1dc9ac8d7f6f6ad8057c2130c48798e89111f1dac5f89a9a07880abb23766470084095fc1c77e7b83e0e4b1070a12dd87c69d7ce674b9
SSDEEP

12288:S2pUJ3r6YkVwJgNnSykgb9cqWnw4q6ZmFhqss:9pUNr6YkVRFkgbeqeo68Fhq

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"	xaxybxpphkh.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"	xaxybxpphkh.exe

Detect Pykspa worm 1 IoCs

worm

resource	yara_rule
behavioral1/files/0x000a000000012033-8.dat	family_pykspa

Executes dropped EXE 1 IoCs

pid	Process
2388	xaxybxpphkh.exe

Loads dropped DLL 2 IoCs

pid	Process
2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe
2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.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"	xaxybxpphkh.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	xaxybxpphkh.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\mfuqdbsexpqaemwzyf.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\SysWOW64\xrhesrjwqjlwbkvzzhb.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\SysWOW64\kfwujjcqlfiuakwbclgb.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\SysWOW64\zvnmcdxmidhubmzfhrnjb.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\SysWOW64\qnggxzukhdiweqelozwtmm.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\SysWOW64\wnaufbqarhgoqwef.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\SysWOW64\dvjeqndogxxgjqzbz.exe	xaxybxpphkh.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\zvnmcdxmidhubmzfhrnjb.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\qnggxzukhdiweqelozwtmm.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\wnaufbqarhgoqwef.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\dvjeqndogxxgjqzbz.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\mfuqdbsexpqaemwzyf.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\xrhesrjwqjlwbkvzzhb.exe	xaxybxpphkh.exe
File opened for modification	C:\Windows\kfwujjcqlfiuakwbclgb.exe	xaxybxpphkh.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_962dc67fe9d8c2f06aa18586ce6be0de.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2388	2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe	31
PID 2300 wrote to memory of 2388	2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe	31
PID 2300 wrote to memory of 2388	2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe	31
PID 2300 wrote to memory of 2388	2300	JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe	31

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

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_962dc67fe9d8c2f06aa18586ce6be0de.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Users\Admin\AppData\Local\Temp\xaxybxpphkh.exe
  "C:\Users\Admin\AppData\Local\Temp\xaxybxpphkh.exe" "c:\users\admin\appdata\local\temp\jaffacakes118_962dc67fe9d8c2f06aa18586ce6be0de.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:2388

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:\Users\Admin\AppData\Local\Temp\xaxybxpphkh.exe

Filesize
320KB

MD5
83a88f80c1d8cd0511b7e4c9e9677448

SHA1
a414c3662b1a0ec23a9399fa69f737bd93df7134

SHA256
052359b86b92f7024c61beae68b39660b3f074691f2935aa8994a7b7a80bbef6

SHA512
5a1c7e50dd143ed2f8eda77c598b534fcb45d766bb0986b460642134ded507db967e9f1e1cad76501f1f1b7cd0c5405d2d4b167ab5c4729272efdb76e8d777c5

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C:\Windows\SysWOW64\mfuqdbsexpqaemwzyf.exe

Filesize
968KB

MD5
962dc67fe9d8c2f06aa18586ce6be0de

SHA1
990418410db8507f25d40b2899fddfcc80c01721

SHA256
84372360b237f339d6a7e424e8b559baa05ef9a2b118c9f5527569ee8fb45dd1

SHA512
a32678d66e5707831bf1dc9ac8d7f6f6ad8057c2130c48798e89111f1dac5f89a9a07880abb23766470084095fc1c77e7b83e0e4b1070a12dd87c69d7ce674b9

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads