pykspa | f61f89ee6617b8121558c3d2d87e0154413eaffb047d24d34c18d688b461fabd

General

Target

JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe
Size

476KB
MD5

8f5573f964d57bc8a4c6ef938d9fda50
SHA1

29d9e4ea3623b583375e5b08670a83a98a6f51f8
SHA256

f61f89ee6617b8121558c3d2d87e0154413eaffb047d24d34c18d688b461fabd
SHA512

1fe88c2ea862add8325ec204914895370fe5a509e779628cbef171ac1a4026f62f53ef77f0e22aecd476e929e639eef5ac915dc779fc3849ee61429e8f9227a4
SSDEEP

12288:DgkDxdkL+6JNgKVcRa+fpHyWs3OBH4pUaB:/xsKXa+hHyWseBgH

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/0x000b000000012262-2.dat	family_pykspa

Executes dropped EXE 1 IoCs

pid	Process
2820	izfuneuesjp.exe

Loads dropped DLL 2 IoCs

pid	Process
2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe
2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.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\bldogvqbxbxicawr.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\itmyrhdpmroavurnd.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\rdxkevsfdjhuqqolcl.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\cpkytljxwdcqnonldna.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\pdzokdcrrzzomoongrfb.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\etqgdxxnoxyonqrrlxmjz.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\vljaytulnxzqquwxsfvtki.exe	izfuneuesjp.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\etqgdxxnoxyonqrrlxmjz.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\vljaytulnxzqquwxsfvtki.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\bldogvqbxbxicawr.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\itmyrhdpmroavurnd.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\rdxkevsfdjhuqqolcl.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\cpkytljxwdcqnonldna.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\pdzokdcrrzzomoongrfb.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_8f5573f964d57bc8a4c6ef938d9fda50.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe
2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2864 wrote to memory of 2820	2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe	30
PID 2864 wrote to memory of 2820	2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe	30
PID 2864 wrote to memory of 2820	2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe	30
PID 2864 wrote to memory of 2820	2864	JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.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_8f5573f964d57bc8a4c6ef938d9fda50.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8f5573f964d57bc8a4c6ef938d9fda50.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2864
- C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe
  "C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe" "c:\users\admin\appdata\local\temp\jaffacakes118_8f5573f964d57bc8a4c6ef938d9fda50.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:2820

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\rdxkevsfdjhuqqolcl.exe

Filesize
476KB

MD5
8f5573f964d57bc8a4c6ef938d9fda50

SHA1
29d9e4ea3623b583375e5b08670a83a98a6f51f8

SHA256
f61f89ee6617b8121558c3d2d87e0154413eaffb047d24d34c18d688b461fabd

SHA512
1fe88c2ea862add8325ec204914895370fe5a509e779628cbef171ac1a4026f62f53ef77f0e22aecd476e929e639eef5ac915dc779fc3849ee61429e8f9227a4

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

Filesize
320KB

MD5
1dd5dd5561723f37ccc81e15ecdbf830

SHA1
eeb9131c8d276ceb710d163e89fdc62b3e111971

SHA256
c8c542ac3f6526d1501c2b9d6262bfa029a1ac0d9dd6b3c1965977abdd8bd126

SHA512
b4881d7cd0c2ceeba067e13d23763e739389108d1269acd6c343dd308aa1fedde89da696a8482944342f44ea1094ea6b50021a15d4c6d03762ba032a9598bba5

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads