Malware Analysis Report

2025-08-06 03:43

Sample ID 230426-y6fc6sde51
Target Client.exe
SHA256 f510b0b4cc33d862c3b1d9b35ee76563cf3044e5d85009d27a46177ab4332b7d
Tags
rat default asyncrat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

f510b0b4cc33d862c3b1d9b35ee76563cf3044e5d85009d27a46177ab4332b7d

Threat Level: Known bad

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

Malicious Activity Summary

rat default asyncrat

Async RAT payload

Asyncrat family

AsyncRat

Async RAT payload

Executes dropped EXE

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Creates scheduled task(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-04-26 20:23

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

2023-04-26 20:23

Reported

2023-04-26 20:26

Platform

win7-20230220-en

Max time kernel

144s

Max time network

34s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Async RAT payload

rat
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

Executes dropped EXE

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

Enumerates physical storage devices

Creates scheduled task(s)

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

Delays execution with timeout.exe

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1604 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\cmd.exe
PID 1604 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\cmd.exe
PID 1604 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\cmd.exe
PID 1604 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\system32\cmd.exe
PID 1604 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\system32\cmd.exe
PID 1604 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\system32\cmd.exe
PID 1520 wrote to memory of 544 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1520 wrote to memory of 544 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1520 wrote to memory of 544 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 468 wrote to memory of 268 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 468 wrote to memory of 268 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 468 wrote to memory of 268 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 468 wrote to memory of 340 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\app.exe
PID 468 wrote to memory of 340 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\app.exe
PID 468 wrote to memory of 340 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\app.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "app" /tr '"C:\Users\Admin\AppData\Local\Temp\app.exe"' & exit

C:\Windows\system32\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC60.tmp.bat""

C:\Windows\system32\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "app" /tr '"C:\Users\Admin\AppData\Local\Temp\app.exe"'

C:\Windows\system32\timeout.exe

timeout 3

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

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

Network

Country Destination Domain Proto
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp

Files

memory/1604-54-0x0000000000F60000-0x0000000000F72000-memory.dmp

memory/1604-55-0x000000001B180000-0x000000001B200000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpC60.tmp.bat

MD5 3b24f4704ba426eda5c011d35f467093
SHA1 546c32d9f8a55b1734b6d87561f9f4001ace7df7
SHA256 196246d927cdc9f8a263798ad041984be477162075bd152fadd3554190f85c98
SHA512 49cce688f07f2aaa167de18707e4250c219533a6f6131173ffcc7a12fe2413e2031b7c72183d8b834c3c9113e436d2694020ed0d26902e6fadc9d3af52096cdd

C:\Users\Admin\AppData\Local\Temp\tmpC60.tmp.bat

MD5 3b24f4704ba426eda5c011d35f467093
SHA1 546c32d9f8a55b1734b6d87561f9f4001ace7df7
SHA256 196246d927cdc9f8a263798ad041984be477162075bd152fadd3554190f85c98
SHA512 49cce688f07f2aaa167de18707e4250c219533a6f6131173ffcc7a12fe2413e2031b7c72183d8b834c3c9113e436d2694020ed0d26902e6fadc9d3af52096cdd

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

MD5 ba749e000163c81a53234fcb21cdd2ee
SHA1 1650d6019a972f647ad8b58bab7648bd9311cc02
SHA256 f510b0b4cc33d862c3b1d9b35ee76563cf3044e5d85009d27a46177ab4332b7d
SHA512 91bb51faf1a3ba3ed3e2ee963642da71df3c9c4ffd4502142407fac1cc99f29fa33b0c73abf50f3e1f095252efbfc9fde6a35fece6002349f25c28837583f5d7

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

MD5 ba749e000163c81a53234fcb21cdd2ee
SHA1 1650d6019a972f647ad8b58bab7648bd9311cc02
SHA256 f510b0b4cc33d862c3b1d9b35ee76563cf3044e5d85009d27a46177ab4332b7d
SHA512 91bb51faf1a3ba3ed3e2ee963642da71df3c9c4ffd4502142407fac1cc99f29fa33b0c73abf50f3e1f095252efbfc9fde6a35fece6002349f25c28837583f5d7

memory/340-68-0x0000000000310000-0x0000000000322000-memory.dmp

memory/340-69-0x000000001B0D0000-0x000000001B150000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-04-26 20:23

Reported

2023-04-26 20:26

Platform

win10v2004-20230220-en

Max time kernel

144s

Max time network

147s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Async RAT payload

rat
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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Client.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

Creates scheduled task(s)

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

Delays execution with timeout.exe

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

Suspicious use of AdjustPrivilegeToken

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "app" /tr '"C:\Users\Admin\AppData\Local\Temp\app.exe"' & exit

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCA79.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Windows\system32\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "app" /tr '"C:\Users\Admin\AppData\Local\Temp\app.exe"'

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 42.220.44.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 76.38.195.152.in-addr.arpa udp
N/A 127.0.0.1:8848 tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
IE 13.69.239.72:443 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
US 8.8.8.8:53 45.8.109.52.in-addr.arpa udp
N/A 127.0.0.1:8848 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
N/A 127.0.0.1:8848 tcp
NL 173.223.113.164:443 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
US 52.152.110.14:443 tcp
N/A 127.0.0.1:8848 tcp
N/A 127.0.0.1:8848 tcp

Files

memory/3280-133-0x0000000000960000-0x0000000000972000-memory.dmp

memory/3280-134-0x000000001B650000-0x000000001B660000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpCA79.tmp.bat

MD5 cafae8c8ce10f629eb6c1bebd16af8d6
SHA1 d9bd95052291908cc25662424956b43c3de5f783
SHA256 eae0e843390e926757e8628bbc344e33ab9409d11dd6f67a6e081a2bd65d1edf
SHA512 edfd4c30d696fcc90695c9b2d576a7a440c34bbd19d0e6007f309d67fbdf035fb58e03002578d27de49ad1c265191b28cd8ece6aba59d64ccd0fe6935033751c

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

MD5 ba749e000163c81a53234fcb21cdd2ee
SHA1 1650d6019a972f647ad8b58bab7648bd9311cc02
SHA256 f510b0b4cc33d862c3b1d9b35ee76563cf3044e5d85009d27a46177ab4332b7d
SHA512 91bb51faf1a3ba3ed3e2ee963642da71df3c9c4ffd4502142407fac1cc99f29fa33b0c73abf50f3e1f095252efbfc9fde6a35fece6002349f25c28837583f5d7

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

MD5 ba749e000163c81a53234fcb21cdd2ee
SHA1 1650d6019a972f647ad8b58bab7648bd9311cc02
SHA256 f510b0b4cc33d862c3b1d9b35ee76563cf3044e5d85009d27a46177ab4332b7d
SHA512 91bb51faf1a3ba3ed3e2ee963642da71df3c9c4ffd4502142407fac1cc99f29fa33b0c73abf50f3e1f095252efbfc9fde6a35fece6002349f25c28837583f5d7

memory/4248-143-0x000000001CEE0000-0x000000001CEF0000-memory.dmp

memory/4248-144-0x000000001CEE0000-0x000000001CEF0000-memory.dmp