pykspa | fab208d4fde711f95e4da7fdfe3d7855f866bd2f367570aac74320952291faa1

General

Target

JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe
Size

600KB
MD5

8abe43cb15a9dd8d69f77c0c833c6809
SHA1

a011f0a13161d2dac9f01e609af99a4afc39b871
SHA256

fab208d4fde711f95e4da7fdfe3d7855f866bd2f367570aac74320952291faa1
SHA512

e66d77f0df46f46d278a9c22f204d346cbc9a4028d433307967421c9d62f4d54d26d5c8cd23511e733941c15b086e9d92925d5d55c5402770bdd90b509df2b1a
SSDEEP

12288:46onxOp8FySpE5zvIdtU+YmefaRfMMMMM2MMMMM:swp8DozAdO9aRfMMMMM2MMMMM

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
2052	izfuneuesjp.exe

Loads dropped DLL 2 IoCs

pid	Process
2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe
2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.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\nabmjdvnxjhuqqolch.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\ymoaytmfqdcqnonldjx.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\ladqplfzlzzomoongncf.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\aquiifavixyonqrrltjnb.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\rincdbxthxzqquwxsbsxmn.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\xihqldtjrbxicawr.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\SysWOW64\eqqawpgxgroavurnd.exe	izfuneuesjp.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rincdbxthxzqquwxsbsxmn.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\xihqldtjrbxicawr.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\eqqawpgxgroavurnd.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\nabmjdvnxjhuqqolch.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\ymoaytmfqdcqnonldjx.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\ladqplfzlzzomoongncf.exe	izfuneuesjp.exe
File opened for modification	C:\Windows\aquiifavixyonqrrltjnb.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_8abe43cb15a9dd8d69f77c0c833c6809.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe
2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 2052	2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe	29
PID 2248 wrote to memory of 2052	2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe	29
PID 2248 wrote to memory of 2052	2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe	29
PID 2248 wrote to memory of 2052	2248	JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.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_8abe43cb15a9dd8d69f77c0c833c6809.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8abe43cb15a9dd8d69f77c0c833c6809.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe
  "C:\Users\Admin\AppData\Local\Temp\izfuneuesjp.exe" "c:\users\admin\appdata\local\temp\jaffacakes118_8abe43cb15a9dd8d69f77c0c833c6809.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:2052

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\nabmjdvnxjhuqqolch.exe

Filesize
600KB

MD5
8abe43cb15a9dd8d69f77c0c833c6809

SHA1
a011f0a13161d2dac9f01e609af99a4afc39b871

SHA256
fab208d4fde711f95e4da7fdfe3d7855f866bd2f367570aac74320952291faa1

SHA512
e66d77f0df46f46d278a9c22f204d346cbc9a4028d433307967421c9d62f4d54d26d5c8cd23511e733941c15b086e9d92925d5d55c5402770bdd90b509df2b1a

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

Filesize
320KB

MD5
5203b6ea0901877fbf2d8d6f6d8d338e

SHA1
c803e92561921b38abe13239c1fd85605b570936

SHA256
0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060

SHA512
d48a41b4fc4c38a6473f789c02918fb7353a4b4199768a3624f3b685d91d38519887a1ccd3616e0d2b079a346afaec5a0f2ef2c46d72d3097ef561cedb476471

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads