Malware Analysis Report

2025-03-14 22:53

Sample ID 240406-1n4ddsbh81
Target e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118
SHA256 3922e0e99e701fac316e6324f360556fb11dcb23568dced0fc120971eb7b280f
Tags
upx persistence spyware stealer
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

3922e0e99e701fac316e6324f360556fb11dcb23568dced0fc120971eb7b280f

Threat Level: Shows suspicious behavior

The file e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx persistence spyware stealer

UPX packed file

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 21:48

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-06 21:48

Reported

2024-04-06 21:51

Platform

win7-20240221-en

Max time kernel

141s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\vKz6Bis1d8oda4r.exe N/A
N/A N/A C:\Windows\CTS.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A
N/A N/A N/A N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\vKz6Bis1d8oda4r.exe

C:\Users\Admin\AppData\Local\Temp\vKz6Bis1d8oda4r.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

memory/1704-0-0x00000000010A0000-0x00000000010B7000-memory.dmp

\Users\Admin\AppData\Local\Temp\vKz6Bis1d8oda4r.exe

MD5 3d02b1d79394fe13058ab40a0abfb133
SHA1 d6c2b092f1bc79a1b53975bc9b34a5a3c4529ba9
SHA256 41151a38436ceb8acaac016619e3eeb99b671cd13c024d6d8e91fa89b7697900
SHA512 0b312a77f3a422f695e8b7953f03db31941fd24540e7162221dc8fefcc323e16ef7cf3ce6f82dc1f7e8bd78214301b082de518878a803f989ab85485918e00bc

memory/1704-10-0x00000000010A0000-0x00000000010B7000-memory.dmp

C:\Windows\CTS.exe

MD5 70aa23c9229741a9b52e5ce388a883ac
SHA1 b42683e21e13de3f71db26635954d992ebe7119e
SHA256 9d25cc704b1c00c9d17903e25ca35c319663e997cb9da0b116790b639e9688f2
SHA512 be604a2ad5ab8a3e5edb8901016a76042ba873c8d05b4ef8eec31241377ec6b2a883b51c6912dc7640581ffa624547db334683975883ae74e62808b5ae9ab0b5

memory/2980-14-0x0000000000D90000-0x0000000000DA7000-memory.dmp

memory/1704-11-0x00000000000E0000-0x00000000000F7000-memory.dmp

memory/1704-22-0x00000000000E0000-0x00000000000F7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 21:48

Reported

2024-04-06 21:51

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\CMbcxjUpCkxJmbm.exe N/A
N/A N/A C:\Windows\CTS.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e35c375b6c9a45948afb7c39d54bb861_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\CMbcxjUpCkxJmbm.exe

C:\Users\Admin\AppData\Local\Temp\CMbcxjUpCkxJmbm.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 159.113.220.23.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 90.65.42.20.in-addr.arpa udp

Files

memory/1540-0-0x0000000000310000-0x0000000000327000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\CMbcxjUpCkxJmbm.exe

MD5 3d02b1d79394fe13058ab40a0abfb133
SHA1 d6c2b092f1bc79a1b53975bc9b34a5a3c4529ba9
SHA256 41151a38436ceb8acaac016619e3eeb99b671cd13c024d6d8e91fa89b7697900
SHA512 0b312a77f3a422f695e8b7953f03db31941fd24540e7162221dc8fefcc323e16ef7cf3ce6f82dc1f7e8bd78214301b082de518878a803f989ab85485918e00bc

C:\Windows\CTS.exe

MD5 70aa23c9229741a9b52e5ce388a883ac
SHA1 b42683e21e13de3f71db26635954d992ebe7119e
SHA256 9d25cc704b1c00c9d17903e25ca35c319663e997cb9da0b116790b639e9688f2
SHA512 be604a2ad5ab8a3e5edb8901016a76042ba873c8d05b4ef8eec31241377ec6b2a883b51c6912dc7640581ffa624547db334683975883ae74e62808b5ae9ab0b5

memory/1604-8-0x0000000000E50000-0x0000000000E67000-memory.dmp

memory/1540-9-0x0000000000310000-0x0000000000327000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

MD5 58ab350193e4ddc7050916387eb50ac4
SHA1 89c9c68f69a28f94095f5245f1a0a781e7ff402b
SHA256 5abb318adbb9f2d2f331ed63927e561ad61636c23c7b7cb7bfe755fbfd279919
SHA512 6ac53319553f2a3fdd76495e4298242482ab1c73c48080c702b83b0c03877e9664be73d86251791d5ca9a8847dd475decbed067ce2c030fbe8df08aa772e11d8

memory/1604-31-0x0000000000E50000-0x0000000000E67000-memory.dmp