Malware Analysis Report

2024-09-11 09:33

Sample ID 240603-s63wksbc5z
Target Client-built.exe
SHA256 0ff130c66f8539585e58166cf27ff4f452baa925106e68f0ee39ab16933f0527
Tags
discordrat persistence rat rootkit stealer evasion
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

0ff130c66f8539585e58166cf27ff4f452baa925106e68f0ee39ab16933f0527

Threat Level: Known bad

The file Client-built.exe was found to be: Known bad.

Malicious Activity Summary

discordrat persistence rat rootkit stealer evasion

Discordrat family

Discord RAT

Legitimate hosting services abused for malware hosting/C2

Resource Forking

Enumerates physical storage devices

Unsigned PE

Modifies data under HKEY_USERS

Suspicious use of SetWindowsHookEx

Suspicious behavior: LoadsDriver

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Hide Artifacts
T1564
Resource Forking
T1564.009
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Web Service
T1102
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-03 15:45

Signatures

Discordrat family

discordrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-03 15:45

Reported

2024-06-03 15:48

Platform

win11-20240426-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

Signatures

Discord RAT

stealer rootkit rat persistence discordrat

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Enumerates physical storage devices

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "118" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" C:\Windows\system32\LogonUI.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00 C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History C:\Windows\system32\LogonUI.exe N/A

Suspicious behavior: LoadsDriver

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Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\LogonUI.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3140 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\System32\shutdown.exe
PID 3140 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\System32\shutdown.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

C:\Windows\System32\shutdown.exe

"C:\Windows\System32\shutdown.exe" /L

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x4 /state0:0xa3a00855 /state1:0x41c64e6d

Network

Country Destination Domain Proto
US 8.8.8.8:53 gateway.discord.gg udp
US 162.159.136.234:443 gateway.discord.gg tcp
US 8.8.8.8:53 234.136.159.162.in-addr.arpa udp
US 162.159.128.233:443 discord.com tcp
DE 159.89.102.253:443 geolocation-db.com tcp
US 162.159.128.233:443 discord.com tcp
US 162.159.128.233:443 discord.com tcp
US 162.159.128.233:443 discord.com tcp
US 162.159.128.233:443 discord.com tcp
US 52.111.229.43:443 tcp

Files

memory/3140-0-0x000002A68EE30000-0x000002A68EE48000-memory.dmp

memory/3140-1-0x00007FFF244F3000-0x00007FFF244F5000-memory.dmp

memory/3140-2-0x000002A6A94F0000-0x000002A6A96B2000-memory.dmp

memory/3140-3-0x00007FFF244F0000-0x00007FFF24FB2000-memory.dmp

memory/3140-4-0x000002A6AA770000-0x000002A6AAC98000-memory.dmp

memory/3140-5-0x00007FFF244F0000-0x00007FFF24FB2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-03 15:45

Reported

2024-06-03 15:48

Platform

macos-20240410-en

Max time kernel

126s

Max time network

143s

Command Line

[sh -c sudo /bin/zsh -c "/Users/run/Client-built.exe"]

Signatures

Resource Forking

evasion
Description Indicator Process Target
N/A /System/Library/PreferencePanes/Sidecar.prefPane/Contents/Resources/sidecarPrefCheck N/A N/A
N/A /System/Library/PreferencePanes/TouchID.prefPane/Contents/Resources/AllowPasswordPref N/A N/A
N/A /System/Library/PreferencePanes/Wallet.prefPane/Contents/Resources/walletAvailabilityCheckTool N/A N/A
N/A /System/Library/PreferencePanes/ClassroomSettings.prefPane/Contents/Resources/ClassroomSettingsVisibilityCheckTool N/A N/A
N/A /System/Library/PreferencePanes/Profiles.prefPane/Contents/Resources/CPPrefPaneEnabledTool N/A N/A

Processes

/bin/sh

[sh -c sudo /bin/zsh -c "/Users/run/Client-built.exe"]

/bin/bash

[sh -c sudo /bin/zsh -c "/Users/run/Client-built.exe"]

/usr/bin/sudo

[sudo /bin/zsh -c /Users/run/Client-built.exe]

/bin/zsh

[/bin/zsh -c /Users/run/Client-built.exe]

/Users/run/Client-built.exe

[/Users/run/Client-built.exe]

/usr/bin/pluginkit

[/usr/bin/pluginkit -e ignore -i com.microsoft.OneDrive.FinderSync]

/usr/sbin/spctl

[/usr/sbin/spctl --assess --type execute /var/folders/pq/yy2b5ptn4cz739jgclj4m1wm0000gp/T/OneDriveUpdaterB516C108/OneDrive.app]

/usr/libexec/xpcproxy

[xpcproxy com.apple.sysmond]

/usr/libexec/sysmond

[/usr/libexec/sysmond]

/usr/libexec/xpcproxy

[xpcproxy com.apple.audio.systemsoundserverd]

/usr/sbin/systemsoundserverd

[/usr/sbin/systemsoundserverd]

/usr/libexec/xpcproxy

[xpcproxy com.apple.pbs]

/System/Library/CoreServices/pbs

[/System/Library/CoreServices/pbs]

/usr/libexec/xpcproxy

[xpcproxy com.apple.audio.AudioComponentRegistrar]

/System/Library/Frameworks/AudioToolbox.framework/AudioComponentRegistrar

[/System/Library/Frameworks/AudioToolbox.framework/AudioComponentRegistrar -daemon]

/usr/libexec/xpcproxy

[xpcproxy com.apple.systempreferences.2140]

/System/Applications/System Preferences.app/Contents/MacOS/System Preferences

[/System/Applications/System Preferences.app/Contents/MacOS/System Preferences]

/usr/libexec/xpcproxy

[xpcproxy com.apple.AccountProfileRemoteViewService 535]

/System/Library/PrivateFrameworks/AOSUI.framework/Versions/A/XPCServices/AccountProfileRemoteViewService.xpc/Contents/MacOS/AccountProfileRemoteViewService

[/System/Library/PrivateFrameworks/AOSUI.framework/Versions/A/XPCServices/AccountProfileRemoteViewService.xpc/Contents/MacOS/AccountProfileRemoteViewService]

/System/Library/PreferencePanes/ClassroomSettings.prefPane/Contents/Resources/ClassroomSettingsVisibilityCheckTool

[/System/Library/PreferencePanes/ClassroomSettings.prefPane/Contents/Resources/ClassroomSettingsVisibilityCheckTool]

/System/Library/PreferencePanes/Profiles.prefPane/Contents/Resources/CPPrefPaneEnabledTool

[/System/Library/PreferencePanes/Profiles.prefPane/Contents/Resources/CPPrefPaneEnabledTool]

/System/Library/PreferencePanes/Sidecar.prefPane/Contents/Resources/sidecarPrefCheck

[/System/Library/PreferencePanes/Sidecar.prefPane/Contents/Resources/sidecarPrefCheck]

/System/Library/PreferencePanes/TouchID.prefPane/Contents/Resources/AllowPasswordPref

[/System/Library/PreferencePanes/TouchID.prefPane/Contents/Resources/AllowPasswordPref]

/System/Library/PreferencePanes/Wallet.prefPane/Contents/Resources/walletAvailabilityCheckTool

[/System/Library/PreferencePanes/Wallet.prefPane/Contents/Resources/walletAvailabilityCheckTool]

/usr/libexec/xpcproxy

[xpcproxy com.apple.nfcd]

/usr/libexec/nfcd

[/usr/libexec/nfcd]

/usr/libexec/xpcproxy

[xpcproxy com.apple.studentd]

/usr/libexec/studentd

[/usr/libexec/studentd]

/usr/libexec/xpcproxy

[xpcproxy com.apple.Safari.2028]

/Applications/Safari.app/Contents/MacOS/Safari

[/Applications/Safari.app/Contents/MacOS/Safari]

/usr/libexec/xpcproxy

[xpcproxy com.apple.Safari.History]

/System/Library/PrivateFrameworks/SafariShared.framework/Versions/A/XPCServices/com.apple.Safari.History.xpc/Contents/MacOS/com.apple.Safari.History

[/System/Library/PrivateFrameworks/SafariShared.framework/Versions/A/XPCServices/com.apple.Safari.History.xpc/Contents/MacOS/com.apple.Safari.History]

/usr/libexec/xpcproxy

[xpcproxy com.apple.WebKit.WebContent.7EBFA967-F2DE-4E34-9E94-21DECE18DF43 545]

/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent

[/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent]

/usr/libexec/xpcproxy

[xpcproxy com.apple.SafariLaunchAgent]

/Library/Apple/System/Library/CoreServices/SafariSupport.bundle/Contents/MacOS/SafariLaunchAgent

[/Library/Apple/System/Library/CoreServices/SafariSupport.bundle/Contents/MacOS/SafariLaunchAgent]

/usr/libexec/xpcproxy

[xpcproxy com.apple.WebKit.WebContent.6B2723F6-FAA3-40DD-B46D-5C2F10CEFE0D 545]

/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent

[/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent]

/usr/libexec/xpcproxy

[xpcproxy com.apple.Terminal.2100]

/System/Applications/Utilities/Terminal.app/Contents/MacOS/Terminal

[/System/Applications/Utilities/Terminal.app/Contents/MacOS/Terminal]

/usr/bin/login

[login -pf run]

/usr/libexec/xpcproxy

[xpcproxy com.apple.AccountPolicyHelper]

/System/Library/PrivateFrameworks/AccountPolicy.framework/XPCServices/com.apple.AccountPolicyHelper.xpc/Contents/MacOS/com.apple.AccountPolicyHelper

[/System/Library/PrivateFrameworks/AccountPolicy.framework/XPCServices/com.apple.AccountPolicyHelper.xpc/Contents/MacOS/com.apple.AccountPolicyHelper]

/bin/zsh

[-zsh]

/usr/libexec/path_helper

[/usr/libexec/path_helper -s]

/usr/bin/locale

[locale LC_CTYPE]

/usr/libexec/xpcproxy

[xpcproxy com.apple.corespotlightservice.725FD30A-6064-6C02-CC51-5DDB8891B57E]

/System/Library/Frameworks/CoreSpotlight.framework/CoreSpotlightService

[/System/Library/Frameworks/CoreSpotlight.framework/CoreSpotlightService]

Network

Country Destination Domain Proto
US 8.8.8.8:53 mobile.events.data.trafficmanager.net udp
US 20.189.173.23:443 tcp
US 8.8.8.8:53 api.apple-cloudkit.fe2.apple-dns.net udp
NL 17.248.236.65:443 tcp
NL 17.248.236.68:443 tcp
NL 17.248.236.67:443 tcp
US 8.8.8.8:53 apis.apple.map.fastly.net udp
US 8.8.8.8:53 e6858.dscx.akamaiedge.net udp
BE 23.55.96.225:443 e6858.dscx.akamaiedge.net tcp
US 8.8.8.8:53 api-glb-aeuw3b.smoot.apple.com udp
US 8.8.8.8:53 gateway.fe2.apple-dns.net udp
GB 17.250.81.64:443 api.apple-cloudkit.fe2.apple-dns.net tcp
GB 17.250.81.66:443 tcp
US 8.8.8.8:53 cds.apple.com udp
BE 104.68.86.71:443 cds.apple.com tcp
US 8.8.8.8:53 help.apple.com udp
GB 2.21.189.171:443 help.apple.com tcp
GB 2.21.189.171:443 help.apple.com tcp
N/A 224.0.0.251:5353 udp

Files

/var/folders/pq/yy2b5ptn4cz739jgclj4m1wm0000gp/C/com.apple.Safari//mds/mdsObject.db

MD5 d3a1859e6ec593505cc882e6def48fc8
SHA1 f8e6728e3e9de477a75706faa95cead9ce13cb32
SHA256 3ebafa97782204a4a1d75cfec22e15fcdeab45b65bab3b3e65508707e034a16c
SHA512 ea2a749b105759ea33408186b417359deffb4a3a5ed0533cb26b459c16bb3524d67ede5c9cf0d5098921c0c0a9313fb9c2672f1e5ba48810eda548fa3209e818

/var/folders/pq/yy2b5ptn4cz739jgclj4m1wm0000gp/C/com.apple.Safari//mds/mdsDirectory.db

MD5 0e4a0d1ceb2af6f0f8d0167ce77be2d3
SHA1 414ba4c1dc5fc8bf53d550e296fd6f5ad669918c
SHA256 cca093bcfc65e25dd77c849866e110df72526dffbe29d76e11e29c7d888a4030
SHA512 1dc5282d27c49a4b6f921ba5dfc88b8c1d32289df00dd866f9ac6669a5a8d99afeda614bffc7cf61a44375ae73e09cd52606b443b63636977c9cd2ef4fa68a20

/dev/ttys000

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e