pykspa | 785381c164670ccddbef375467c55da621d3f401a56f3e55a14161b108207eca

General

Target

JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe
Size

588KB
MD5

8c87df8a10722c28d397f16720c90b80
SHA1

bcda065863b7c63340b3189270e384f22b44275a
SHA256

785381c164670ccddbef375467c55da621d3f401a56f3e55a14161b108207eca
SHA512

acfc4734b0503f20070d63d4d72d672fc1a155208e502caf2d49824471a400ff04ae70032c3893a47c50d053817cc139495a1bee7bc94722a67c9c471bd65f1d
SSDEEP

12288:AgHsqmAdjxORA4GTe2Pr9hroyCMJOcddfm+YFtA7dM9BAYdNUGotp0:0qmwjfz79iSJOUYFtkC/Ubp0

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"	cxtzfhhamhd.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"	cxtzfhhamhd.exe

Detect Pykspa worm 1 IoCs

worm

resource	yara_rule
behavioral1/files/0x00080000000120ff-2.dat	family_pykspa

Executes dropped EXE 1 IoCs

pid	Process
2080	cxtzfhhamhd.exe

Loads dropped DLL 2 IoCs

pid	Process
2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe
2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.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"	cxtzfhhamhd.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	cxtzfhhamhd.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\xtiaznhztlqtxlzjrsb.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\SysWOW64\khxqqfatohnrwlaluwgd.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\SysWOW64\zxoijzvplfmrxndpzcnlc.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\SysWOW64\qphcevsnkfntarivgkwvni.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\SysWOW64\wpbqmxodujllmxip.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\SysWOW64\dxkaxjbrjzcdfrdlr.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\SysWOW64\mhvmkxqharvxanajqq.exe	cxtzfhhamhd.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\wpbqmxodujllmxip.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\dxkaxjbrjzcdfrdlr.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\mhvmkxqharvxanajqq.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\xtiaznhztlqtxlzjrsb.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\khxqqfatohnrwlaluwgd.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\zxoijzvplfmrxndpzcnlc.exe	cxtzfhhamhd.exe
File opened for modification	C:\Windows\qphcevsnkfntarivgkwvni.exe	cxtzfhhamhd.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_8c87df8a10722c28d397f16720c90b80.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 2080	2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe	30
PID 2064 wrote to memory of 2080	2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe	30
PID 2064 wrote to memory of 2080	2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe	30
PID 2064 wrote to memory of 2080	2064	JaffaCakes118_8c87df8a10722c28d397f16720c90b80.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	cxtzfhhamhd.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cxtzfhhamhd.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8c87df8a10722c28d397f16720c90b80.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Users\Admin\AppData\Local\Temp\cxtzfhhamhd.exe
  "C:\Users\Admin\AppData\Local\Temp\cxtzfhhamhd.exe" "c:\users\admin\appdata\local\temp\jaffacakes118_8c87df8a10722c28d397f16720c90b80.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:2080

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\mhvmkxqharvxanajqq.exe

Filesize
588KB

MD5
8c87df8a10722c28d397f16720c90b80

SHA1
bcda065863b7c63340b3189270e384f22b44275a

SHA256
785381c164670ccddbef375467c55da621d3f401a56f3e55a14161b108207eca

SHA512
acfc4734b0503f20070d63d4d72d672fc1a155208e502caf2d49824471a400ff04ae70032c3893a47c50d053817cc139495a1bee7bc94722a67c9c471bd65f1d

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

Filesize
320KB

MD5
b92314203327a733531042bc58e54f57

SHA1
1f3d0081f308a82c9659f4a57fc1ad551167a181

SHA256
d936bfd3b4264fe1650dee22119858b9d0cc58598e7e956ebecf72fb82f7c7d3

SHA512
2982559183e13830cd795c7badadb15b4dad50315155299d9713970aff034c827ade98c79d6da836aea743890aca71bc0f7d5348a32f2858b4f40884ecccf7f7

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads