pykspa | 94297af35450e94c09bbc9a6216363c4c8a11a6a50169ca8c9cec594595aacc3

General

Target

JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe
Size

1016KB
MD5

90f643f9363aa893d0880b9a33cfe3d0
SHA1

3fd9437f2e8c738b4cf99af889053461163a9a68
SHA256

94297af35450e94c09bbc9a6216363c4c8a11a6a50169ca8c9cec594595aacc3
SHA512

66326f0be790024f61fc6a32c0a1f00416ff6c0fd02d17da0b5a41ddd5499c30436d055a6f55e3aa71892361b46da31a9790990d5abe881651b8a8dea2baacc5
SSDEEP

6144:ZBIXsL0tvrSVz1DnemeYbpsnEf78AoXh6KkiD0OofzA+/VygHU:DIXsgtvm1De5YlOx6lzBH46U

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/0x000b000000012263-2.dat	family_pykspa

Executes dropped EXE 1 IoCs

pid	Process
2552	izfuneuesjp.exe

Loads dropped DLL 2 IoCs

pid	Process
2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe
2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.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\wmlertgdpmwvjghgewa.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\jaauilzxkittigiihafw.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\yqrmbfuthgstjilmmgmef.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\pikgwbrrggtvmmqstovoqm.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\vieuednhqkrnysqm.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\cqneppavfaifrmlie.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\layqcdplwsbzmiigdu.exe	izfuneuesjp.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\jaauilzxkittigiihafw.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\yqrmbfuthgstjilmmgmef.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\pikgwbrrggtvmmqstovoqm.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\vieuednhqkrnysqm.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\cqneppavfaifrmlie.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\layqcdplwsbzmiigdu.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\wmlertgdpmwvjghgewa.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_90f643f9363aa893d0880b9a33cfe3d0.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe
2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe
2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 2552	2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe	29
PID 2384 wrote to memory of 2552	2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe	29
PID 2384 wrote to memory of 2552	2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe	29
PID 2384 wrote to memory of 2552	2384	JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe	29

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_90f643f9363aa893d0880b9a33cfe3d0.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_90f643f9363aa893d0880b9a33cfe3d0.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe
  "C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe" "c:\users\admin\appdata\local\temp\jaffacakes118_90f643f9363aa893d0880b9a33cfe3d0.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:2552

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\layqcdplwsbzmiigdu.exe

Filesize
1016KB

MD5
90f643f9363aa893d0880b9a33cfe3d0

SHA1
3fd9437f2e8c738b4cf99af889053461163a9a68

SHA256
94297af35450e94c09bbc9a6216363c4c8a11a6a50169ca8c9cec594595aacc3

SHA512
66326f0be790024f61fc6a32c0a1f00416ff6c0fd02d17da0b5a41ddd5499c30436d055a6f55e3aa71892361b46da31a9790990d5abe881651b8a8dea2baacc5

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

Filesize
320KB

MD5
f7fdcd8f7d385a5f1f0c434dde17a834

SHA1
25984f9fa8ce3ded1d8c8ee027fe268cfd985bd1

SHA256
38733d8b70828a7ba240f80c361f9be03f06a183f13904663608bfeea688b2dc

SHA512
c4873440c317a555b6521efb3447084de45687df334254b92776ac58e4a5c84c0d73b8c4b805585506e17b2c3b1e5a337ad58ac925e122561b81f3e26729120c

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads