Malware Analysis Report

2024-08-06 13:12

Sample ID 240618-wn55rstdma
Target runtime.exe
SHA256 5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
Tags
rat default asyncrat
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

5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311

Threat Level: Known bad

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

Malicious Activity Summary

rat default asyncrat

Async RAT payload

AsyncRat

Asyncrat family

Async RAT payload

Checks computer location settings

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Delays execution with timeout.exe

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Persistence
TA0003
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Defense Evasion
TA0005
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 18:05

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 18:05

Reported

2024-06-18 18:07

Platform

win7-20240221-en

Max time kernel

127s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\runtime.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\win.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\runtime.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\win.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1684 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\System32\cmd.exe
PID 1684 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\System32\cmd.exe
PID 1684 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\System32\cmd.exe
PID 1684 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\system32\cmd.exe
PID 1684 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\system32\cmd.exe
PID 1684 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\system32\cmd.exe
PID 2160 wrote to memory of 2720 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 2160 wrote to memory of 2720 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 2160 wrote to memory of 2720 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 2764 wrote to memory of 2724 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2764 wrote to memory of 2724 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2764 wrote to memory of 2724 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2764 wrote to memory of 2572 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\win.exe
PID 2764 wrote to memory of 2572 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\win.exe
PID 2764 wrote to memory of 2572 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\win.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\cmd.exe

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

C:\Windows\system32\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2481.tmp.bat""

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\timeout.exe

timeout 3

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

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

Network

Country Destination Domain Proto
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp

Files

memory/1684-0-0x000007FEF5FA3000-0x000007FEF5FA4000-memory.dmp

memory/1684-1-0x00000000003F0000-0x0000000000408000-memory.dmp

memory/1684-3-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

memory/1684-12-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp2481.tmp.bat

MD5 c939459f78c380f7b09d855a002f3a2d
SHA1 8c1a6df42db1d151868484bf0e35d427d77eeeee
SHA256 321a507f9f074b551530b762e5c49ff18328f78638355c32fc5551a50261df30
SHA512 98db8566d01d177b0924523a6ee10d3bfde49a6bc1b5588ac70674c9889e7038f391a49cbd6ab9aae42122dc179aa2cad518d73934e20b871b3b99d404494889

memory/1684-14-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

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

MD5 4fa7b1eec1fc84eb3a13c29e5a37aae7
SHA1 dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326
SHA256 5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
SHA512 5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba

memory/2572-18-0x0000000000D80000-0x0000000000D98000-memory.dmp

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

MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 18:05

Reported

2024-06-18 18:07

Platform

win10v2004-20240611-en

Max time kernel

126s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\runtime.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-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\runtime.exe N/A

Executes dropped EXE

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1332 wrote to memory of 872 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\System32\cmd.exe
PID 1332 wrote to memory of 872 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\System32\cmd.exe
PID 1332 wrote to memory of 3068 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\system32\cmd.exe
PID 1332 wrote to memory of 3068 N/A C:\Users\Admin\AppData\Local\Temp\runtime.exe C:\Windows\system32\cmd.exe
PID 3068 wrote to memory of 3176 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 3068 wrote to memory of 3176 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 872 wrote to memory of 2756 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 872 wrote to memory of 2756 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 3068 wrote to memory of 3932 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\win.exe
PID 3068 wrote to memory of 3932 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\win.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\cmd.exe

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

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4F78.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Windows\system32\schtasks.exe

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
BE 88.221.83.226:443 www.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 105.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 226.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 72.5.43.15:4449 tcp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp
US 72.5.43.15:4449 tcp
US 8.8.8.8:53 114.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 72.5.43.15:4449 tcp
US 72.5.43.15:4449 tcp

Files

memory/1332-0-0x00007FFE378C3000-0x00007FFE378C5000-memory.dmp

memory/1332-1-0x00000000001C0000-0x00000000001D8000-memory.dmp

memory/1332-3-0x00007FFE378C0000-0x00007FFE38381000-memory.dmp

memory/1332-8-0x00007FFE378C0000-0x00007FFE38381000-memory.dmp

memory/1332-9-0x00007FFE378C0000-0x00007FFE38381000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp4F78.tmp.bat

MD5 a8cb0cc499b2dc06ec27b518e88ee13b
SHA1 fa381a92da0376621b0d81551ba1cf1101398df1
SHA256 abed9dad81e42b5c7d8ea75726c03d49e3191de760ca1dd4a068fa25c04f0a7a
SHA512 f1237583ad38880f5dc0faeaf3928fa600d5fe90d35cee92f5e7d68a93d49447515b526a019de2238374183a89563e09b462ff248d8ff0b9e286262c13f57ce3

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

MD5 4fa7b1eec1fc84eb3a13c29e5a37aae7
SHA1 dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326
SHA256 5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
SHA512 5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba

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

MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b