Malware Analysis Report

2024-09-11 12:59

Sample ID 240613-sjmk3syakk
Target a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118
SHA256 664177b377ff7b758662d8811100d23a89710470eaee5e2fe86114dd00237119
Tags
evasion persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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
10/10

SHA256

664177b377ff7b758662d8811100d23a89710470eaee5e2fe86114dd00237119

Threat Level: Known bad

The file a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

evasion persistence trojan

Modifies firewall policy service

UAC bypass

Adds Run key to start application

Checks whether UAC is enabled

Drops file in Windows directory

Unsigned PE

Suspicious behavior: EnumeratesProcesses

System policy modification

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Create or Modify System Process
T1543
Windows Service
T1543.003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Create or Modify System Process
T1543
Windows Service
T1543.003
Abuse Elevation Control Mechanism
T1548
Bypass User Account Control
T1548.002
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Abuse Elevation Control Mechanism
T1548
Bypass User Account Control
T1548.002
Impair Defenses
T1562
Disable or Modify Tools
T1562.001
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-13 15:09

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 15:09

Reported

2024-06-13 15:11

Platform

win7-20240508-en

Max time kernel

140s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe"

Signatures

Modifies firewall policy service

evasion
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe:*:Enabled:System" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\dolleer.exe internacional = "C:\\Windows\\dolleer.exe" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\dolleer.exe C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
File opened for modification C:\Windows\dolleer.exe C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

System policy modification

evasion
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.phoenixexecutivenetwork.com udp
US 8.8.8.8:53 www.hansi-hinterseer.org udp

Files

memory/1832-0-0x0000000000250000-0x0000000000251000-memory.dmp

memory/1832-1-0x0000000000400000-0x0000000000D33000-memory.dmp

memory/1832-2-0x0000000000400000-0x0000000000D33000-memory.dmp

memory/1832-3-0x0000000000250000-0x0000000000251000-memory.dmp

memory/1832-5-0x0000000000400000-0x0000000000D33000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 15:09

Reported

2024-06-13 15:12

Platform

win10v2004-20240611-en

Max time kernel

141s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe"

Signatures

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\dolleer.exe internacional = "C:\\Windows\\dolleer.exe" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\dolleer.exe C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
File opened for modification C:\Windows\dolleer.exe C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a62e7c62aa66c6d3f18b6dd0cebbbca9_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.phoenixexecutivenetwork.com udp
CA 172.105.106.222:80 www.phoenixexecutivenetwork.com tcp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 www.hansi-hinterseer.org udp
US 131.253.33.237:443 g.bing.com tcp
US 8.8.8.8:53 222.106.105.172.in-addr.arpa udp
US 8.8.8.8:53 17.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.33.253.131.in-addr.arpa udp
US 8.8.8.8:53 87.121.18.2.in-addr.arpa udp
NL 23.62.61.89:443 www.bing.com tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 89.61.62.23.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 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/956-0-0x0000000002C50000-0x0000000002C51000-memory.dmp

memory/956-2-0x0000000000400000-0x0000000000D33000-memory.dmp

memory/956-4-0x0000000002C50000-0x0000000002C51000-memory.dmp