Malware Analysis Report

2024-08-06 13:00

Sample ID 240605-ye3dmagf42
Target Documento_Legal_Procesado_N#456789098765.tar
SHA256 2bb33982a96914e407b4fc2a6775869a03dc014b1fd73c135e70ec892d9f9920
Tags
asyncrat 05junio persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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

2bb33982a96914e407b4fc2a6775869a03dc014b1fd73c135e70ec892d9f9920

Threat Level: Known bad

The file Documento_Legal_Procesado_N#456789098765.tar was found to be: Known bad.

Malicious Activity Summary

asyncrat 05junio persistence rat

AsyncRat

Executes dropped EXE

Checks computer location settings

Adds Run key to start application

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

Modifies registry class

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
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

2024-06-05 19:43

Signatures

Unsigned PE

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

Analysis: behavioral3

Detonation Overview

Submitted

2024-06-05 19:42

Reported

2024-06-05 19:51

Platform

win7-20240220-es

Max time kernel

122s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe"

Signatures

AsyncRat

rat asyncrat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\Musara = "C:\\Users\\Admin\\Documents\\Uooitu\\googins.exe" C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2688 set thread context of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2688 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 2688 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 2688 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 2688 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 2688 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 2688 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe

"C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 diosayudamesenor.dynuddns.net udp
SE 46.246.80.10:22207 diosayudamesenor.dynuddns.net tcp

Files

memory/2688-0-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/2688-1-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/2688-2-0x0000000000407000-0x0000000000421000-memory.dmp

memory/2688-3-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/2688-5-0x0000000000130000-0x000000000013A000-memory.dmp

memory/2688-4-0x0000000000130000-0x000000000013A000-memory.dmp

memory/2688-6-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/2556-9-0x0000000000080000-0x0000000000092000-memory.dmp

memory/2556-8-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

memory/2556-7-0x0000000000080000-0x0000000000092000-memory.dmp

memory/2556-11-0x0000000000080000-0x0000000000092000-memory.dmp

memory/2556-13-0x0000000000080000-0x0000000000092000-memory.dmp

memory/2688-14-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/2556-15-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

memory/2556-16-0x0000000074AE0000-0x00000000751CE000-memory.dmp

memory/2556-34-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

memory/2556-35-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2024-06-05 19:42

Reported

2024-06-05 19:51

Platform

win10v2004-20240426-es

Max time kernel

93s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe"

Signatures

AsyncRat

rat asyncrat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Musara = "C:\\Users\\Admin\\Documents\\Uooitu\\googins.exe" C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4140 set thread context of 4576 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4140 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 4140 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 4140 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 4140 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 4140 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe

"C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765..exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 131.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 diosayudamesenor.dynuddns.net udp
SE 46.246.80.10:22207 diosayudamesenor.dynuddns.net tcp
US 8.8.8.8:53 10.80.246.46.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 105.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 42.56.20.217.in-addr.arpa udp

Files

memory/4140-0-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/4140-2-0x0000000000407000-0x0000000000421000-memory.dmp

memory/4140-1-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/4140-3-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/4140-4-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/4576-5-0x0000000000310000-0x0000000000322000-memory.dmp

memory/4140-6-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/4576-7-0x00000000744FE000-0x00000000744FF000-memory.dmp

memory/4576-8-0x00000000744F0000-0x0000000074CA0000-memory.dmp

memory/4576-9-0x00000000056C0000-0x00000000057C2000-memory.dmp

memory/4576-12-0x0000000005D40000-0x0000000005DDC000-memory.dmp

memory/4576-13-0x0000000006390000-0x0000000006934000-memory.dmp

memory/4576-14-0x0000000005DE0000-0x0000000005E46000-memory.dmp

memory/4576-15-0x00000000744F0000-0x0000000074CA0000-memory.dmp

memory/4576-16-0x00000000744FE000-0x00000000744FF000-memory.dmp

memory/4576-17-0x00000000744F0000-0x0000000074CA0000-memory.dmp

memory/4576-18-0x00000000744F0000-0x0000000074CA0000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-05 19:42

Reported

2024-06-05 19:51

Platform

win7-20240221-es

Max time kernel

147s

Max time network

123s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765.rar

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe N/A

Enumerates physical storage devices

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: 35 N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: SeSecurityPrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1628 wrote to memory of 2548 N/A C:\Windows\system32\cmd.exe C:\Program Files\7-Zip\7zFM.exe
PID 1628 wrote to memory of 2548 N/A C:\Windows\system32\cmd.exe C:\Program Files\7-Zip\7zFM.exe
PID 1628 wrote to memory of 2548 N/A C:\Windows\system32\cmd.exe C:\Program Files\7-Zip\7zFM.exe
PID 2548 wrote to memory of 320 N/A C:\Program Files\7-Zip\7zFM.exe C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe
PID 2548 wrote to memory of 320 N/A C:\Program Files\7-Zip\7zFM.exe C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe
PID 2548 wrote to memory of 320 N/A C:\Program Files\7-Zip\7zFM.exe C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe
PID 2548 wrote to memory of 320 N/A C:\Program Files\7-Zip\7zFM.exe C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765.rar

C:\Program Files\7-Zip\7zFM.exe

"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765.rar"

C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe

"C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe"

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\7zO4F9036D7\Documento_Legal_Procesado_N#456789098765..exe

MD5 c330c57eefd57b2ee73284b107322a0e
SHA1 1d0e26f2e5c7849a68a11bdce1aad02c01f81c1c
SHA256 520cbb6a6e4072968c9e1d0246abb1631927bd9696387326c3188c6ce420cfc7
SHA512 7651abde25704e9cc9f3b6065c742af90eeb2068cc3935bfc42178759af29422e6e51e4690ea007eed4af7f6cf2c51e20e1673ef8c63e96bc84418567188095a

memory/320-36-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/320-37-0x0000000000400000-0x00000000008B8000-memory.dmp

memory/320-40-0x00000000002F0000-0x00000000002FA000-memory.dmp

memory/320-39-0x00000000002F0000-0x00000000002FA000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-05 19:42

Reported

2024-06-05 19:51

Platform

win10v2004-20240226-es

Max time kernel

136s

Max time network

150s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765.rar

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Windows\system32\cmd.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: 35 N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4680 wrote to memory of 1824 N/A C:\Windows\system32\cmd.exe C:\Program Files\7-Zip\7zFM.exe
PID 4680 wrote to memory of 1824 N/A C:\Windows\system32\cmd.exe C:\Program Files\7-Zip\7zFM.exe

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765.rar

C:\Program Files\7-Zip\7zFM.exe

"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Documento_Legal_Procesado_N#456789098765.rar"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=es --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3504 --field-trial-handle=1988,i,6364296261504278587,14971789135277820488,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 13.107.246.64:443 tcp
BE 2.17.107.114:443 www.bing.com tcp
US 8.8.8.8:53 114.107.17.2.in-addr.arpa udp
GB 51.140.244.186:443 tcp
GB 172.165.69.228:443 tcp
GB 142.250.200.14:443 tcp
US 13.107.6.158:443 tcp
GB 216.58.201.97:443 tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
GB 88.221.135.81:443 tcp
US 13.107.42.16:443 tcp
GB 172.217.169.42:443 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 216.58.213.10:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 10.213.58.216.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 122.10.44.20.in-addr.arpa udp

Files

N/A