Malware Analysis Report

2024-10-19 06:56

Sample ID 240628-m5wszsydqp
Target 9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a
SHA256 9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a

Threat Level: Known bad

The file 9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

Asyncrat family

Async RAT payload

AsyncRat

Async RAT payload

Executes dropped EXE

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

Scheduled Task/Job: Scheduled Task

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-28 11:03

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: behavioral2

Detonation Overview

Submitted

2024-06-28 11:03

Reported

2024-06-28 11:06

Platform

win11-20240508-en

Max time kernel

127s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Enumerates physical storage devices

Delays execution with timeout.exe

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

Scheduled Task/Job: Scheduled Task

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe

"C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe"

C:\Windows\System32\cmd.exe

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

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4A96.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Windows\system32\schtasks.exe

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

C:\Users\Admin\AppData\Roaming\task.exe

"C:\Users\Admin\AppData\Roaming\task.exe"

Network

Country Destination Domain Proto
NL 91.92.246.193:4444 tcp
NL 91.92.246.193:4444 tcp
NL 91.92.246.193:4444 tcp
US 52.111.229.43:443 tcp
NL 91.92.246.193:4444 tcp
NL 91.92.246.193:4444 tcp
NL 91.92.246.193:4444 tcp

Files

memory/1976-0-0x00007FFB0A173000-0x00007FFB0A175000-memory.dmp

memory/1976-1-0x00000000008B0000-0x00000000008C8000-memory.dmp

memory/1976-3-0x00007FFB0A170000-0x00007FFB0AC32000-memory.dmp

memory/1976-4-0x00007FFB0A170000-0x00007FFB0AC32000-memory.dmp

memory/1976-9-0x00007FFB0A170000-0x00007FFB0AC32000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp4A96.tmp.bat

MD5 1ef581595663e0e02157647a80f3c6aa
SHA1 9d12d9c72c910e609fe214a9e126dfc4dfdffaea
SHA256 ea66fa1c6c1037499dfebc4154b1442aa149972e3a33d52849d110c675dc0847
SHA512 216cc4ac2210fc9598da72d90b6a5133507eb4907ce283f58d8b0b8cb4ceb095e01cabef3247d3d09ef85a3fa4309e7a12707c85d788bab4b89a461de49313f5

C:\Users\Admin\AppData\Roaming\task.exe

MD5 76e8d35fe35dce2fb65d0e2fb1be067c
SHA1 543ae7d1f3288b6439f50a7a6c50dacf02d13af4
SHA256 9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a
SHA512 d1a406fb8862577e0ba9ed1404b7568fcf519e8a39bc966e9ea58922bb2eb34bdd7275f9f3c6688b77d3604427a21973484d0b15a9cb4c992f61b17a2d775f02

C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-28 11:03

Reported

2024-06-28 11:06

Platform

win10v2004-20240508-en

Max time kernel

127s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Enumerates physical storage devices

Delays execution with timeout.exe

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

Scheduled Task/Job: Scheduled Task

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\task.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe

"C:\Users\Admin\AppData\Local\Temp\9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a.exe"

C:\Windows\System32\cmd.exe

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

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5870.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Windows\system32\schtasks.exe

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

C:\Users\Admin\AppData\Roaming\task.exe

"C:\Users\Admin\AppData\Roaming\task.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 149.177.190.20.in-addr.arpa udp
NL 91.92.246.193:4444 tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
NL 91.92.246.193:4444 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
NL 91.92.246.193:4444 tcp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
NL 91.92.246.193:4444 tcp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
NL 91.92.246.193:4444 tcp
NL 91.92.246.193:4444 tcp

Files

memory/4216-1-0x0000000000710000-0x0000000000728000-memory.dmp

memory/4216-0-0x00007FFAFCB13000-0x00007FFAFCB15000-memory.dmp

memory/4216-3-0x00007FFAFCB10000-0x00007FFAFD5D1000-memory.dmp

memory/4216-8-0x00007FFAFCB10000-0x00007FFAFD5D1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp5870.tmp.bat

MD5 513ef52106e0c31002ebde81e76c7eab
SHA1 6d87673d2ec4be8067e991651ebd22d250c104c4
SHA256 57047ffcf504c71df2199403b1c074f1e6c32001b7cf8fe1cab3b45e963b2204
SHA512 ba16030a52ef8369c4309736b7d7d3ef92e65fc3787537e4b938e2b5d179982b653f348975d463e2f031ebc8e64186ece97409e2a89db9d1847ab367a7747cf8

C:\Users\Admin\AppData\Roaming\task.exe

MD5 76e8d35fe35dce2fb65d0e2fb1be067c
SHA1 543ae7d1f3288b6439f50a7a6c50dacf02d13af4
SHA256 9c75c0e33bb81cadd1659deef9302106b7f2358cd8ea613e6e8b76f41e60ba8a
SHA512 d1a406fb8862577e0ba9ed1404b7568fcf519e8a39bc966e9ea58922bb2eb34bdd7275f9f3c6688b77d3604427a21973484d0b15a9cb4c992f61b17a2d775f02

C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b