Malware Analysis Report

2025-08-06 02:46

Sample ID 241031-djrsgaydlq
Target 8157b685c864ed653938a86a18c61aeb_JaffaCakes118
SHA256 b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3
Tags
defense_evasion discovery
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3

Threat Level: Shows suspicious behavior

The file 8157b685c864ed653938a86a18c61aeb_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

defense_evasion discovery

Executes dropped EXE

Deletes itself

Indicator Removal: File Deletion

Drops file in System32 directory

Unsigned PE

System Location Discovery: System Language Discovery

Checks processor information in registry

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 03:02

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-31 03:02

Reported

2024-10-31 03:26

Platform

win7-20240903-en

Max time kernel

149s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe"

Signatures

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\ooaaya.exe N/A

Indicator Removal: File Deletion

defense_evasion

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\ooaaya.exe C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A
File opened for modification C:\Windows\SysWOW64\ooaaya.exe C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\ooaaya.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\SysWOW64\ooaaya.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\SysWOW64\ooaaya.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe"

C:\Windows\SysWOW64\ooaaya.exe

C:\Windows\SysWOW64\ooaaya.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\8157B6~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 xiaohuei1.3322.org udp

Files

C:\Windows\SysWOW64\ooaaya.exe

MD5 8157b685c864ed653938a86a18c61aeb
SHA1 c8de3b88ba1c2cdcfce054b2a18f08dbc61d4753
SHA256 b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3
SHA512 a23e173881051ded42aea6353dc8a555c774a88750c9b9599b91e49c9a19d34f670eacbf160612ade2375b5eb5efa21102f3d60bd02fb05c787f81afa72ec3d1

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 03:02

Reported

2024-10-31 03:27

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\kcuyyg.exe N/A

Indicator Removal: File Deletion

defense_evasion

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\kcuyyg.exe C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A
File opened for modification C:\Windows\SysWOW64\kcuyyg.exe C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\kcuyyg.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\SysWOW64\kcuyyg.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\SysWOW64\kcuyyg.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe"

C:\Windows\SysWOW64\kcuyyg.exe

C:\Windows\SysWOW64\kcuyyg.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\8157B6~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp
US 8.8.8.8:53 xiaohuei1.3322.org udp

Files

C:\Windows\SysWOW64\kcuyyg.exe

MD5 8157b685c864ed653938a86a18c61aeb
SHA1 c8de3b88ba1c2cdcfce054b2a18f08dbc61d4753
SHA256 b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3
SHA512 a23e173881051ded42aea6353dc8a555c774a88750c9b9599b91e49c9a19d34f670eacbf160612ade2375b5eb5efa21102f3d60bd02fb05c787f81afa72ec3d1