Malware Analysis Report

2024-08-06 13:13

Sample ID 240618-wcsejaxgll
Target fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7
SHA256 fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7
Tags
rat asyncrat execution persistence
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

fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7

Threat Level: Known bad

The file fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7 was found to be: Known bad.

Malicious Activity Summary

rat asyncrat execution persistence

Async RAT payload

Asyncrat family

AsyncRat

Command and Scripting Interpreter: PowerShell

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Modifies registry class

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Command and Scripting Interpreter
T1059
PowerShell
T1059.001
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-18 17:46

Signatures

Async RAT payload

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

Asyncrat family

asyncrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-18 17:46

Reported

2024-06-18 17:49

Platform

win7-20240611-en

Max time kernel

121s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe"

Signatures

AsyncRat

rat asyncrat

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000\Software\Microsoft\Windows\CurrentVersion\Run\JkanJjJrabo = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe" C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key deleted \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell\open\command C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key deleted \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell\open\command C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key deleted \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell\open C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key deleted \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell\open C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000_CLASSES\ms-settings\shell\open\command\ C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 836 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe C:\Windows\System32\cmd.exe
PID 836 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe C:\Windows\System32\cmd.exe
PID 836 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe C:\Windows\System32\cmd.exe
PID 836 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe C:\Windows\System32\cmd.exe
PID 836 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe C:\Windows\System32\cmd.exe
PID 836 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe C:\Windows\System32\cmd.exe
PID 3060 wrote to memory of 2752 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3060 wrote to memory of 2752 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3060 wrote to memory of 2752 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2652 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2652 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2652 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2620 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2620 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2620 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2992 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2992 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 2992 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 564 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 564 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 564 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 1636 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 1636 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2644 wrote to memory of 1636 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe

"C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe & exit

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k start /b powershell.exe Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2 & powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath %USERPROFILE%\AppData" & powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath %USERPROFILE%\Local" & powershell.exe -command "Set-MpPreference -ExclusionExtension '.exe'" & exit

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell Set-MpPreference -SubmitSamplesConsent 2

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath C:\Users\Admin\AppData"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath C:\Users\Admin\Local"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -command "Set-MpPreference -ExclusionExtension '.exe'"

Network

Country Destination Domain Proto
IT 185.196.8.223:7777 tcp

Files

memory/836-0-0x000007FEF5E23000-0x000007FEF5E24000-memory.dmp

memory/836-1-0x0000000001390000-0x00000000013FC000-memory.dmp

memory/836-2-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 81ec9057223b610190f3431b4afd87e6
SHA1 c2cb781c0611d05bdf1ded03f4202d7de50e331d
SHA256 b230d68cdc94c7537514660c20d96bb4056483d316c70622d3b6ae137a4f598d
SHA512 d6ef72c8822ee67e447cd07eae342030fbcf778ebc051311af1c9f1efbbce4b8274e7e00fac0d9db9d25617438134b5a2323d037739faa8fc68b252090e0cf0d

memory/2752-18-0x0000000001FD0000-0x0000000001FD8000-memory.dmp

memory/2752-17-0x000000001B3E0000-0x000000001B6C2000-memory.dmp

memory/2992-24-0x000000001B370000-0x000000001B652000-memory.dmp

memory/2992-25-0x0000000001E60000-0x0000000001E68000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab8133.tmp

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/564-48-0x00000000022A0000-0x00000000022A8000-memory.dmp

memory/1636-55-0x000000001B2D0000-0x000000001B5B2000-memory.dmp

memory/1636-56-0x0000000001F50000-0x0000000001F58000-memory.dmp

memory/836-57-0x000007FEF5E23000-0x000007FEF5E24000-memory.dmp

memory/836-58-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 17:46

Reported

2024-06-18 17:49

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe"

Signatures

AsyncRat

rat asyncrat

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000_Classes\ms-settings\shell\open\command C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000_Classes\ms-settings C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000_Classes\ms-settings\shell C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000_Classes\ms-settings\shell\open C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000_Classes\ms-settings\shell\open\command\ C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe

"C:\Users\Admin\AppData\Local\Temp\fdc933b64df0832a1f88f0e19a4cab67fb110d54c4913367a7215d7890f8a5b7.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/4516-0-0x0000000000B30000-0x0000000000B9C000-memory.dmp

memory/4516-1-0x00007FFCFA0A3000-0x00007FFCFA0A5000-memory.dmp

memory/4516-2-0x00007FFCFA0A0000-0x00007FFCFAB61000-memory.dmp

memory/4516-3-0x00007FFCFA0A0000-0x00007FFCFAB61000-memory.dmp