Malware Analysis Report

2024-08-06 13:13

Sample ID 240616-rwq9cs1ckr
Target f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe
SHA256 f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263
Tags
asyncrat default rat
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

f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263

Threat Level: Known bad

The file f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

Asyncrat family

AsyncRat

Async RAT payload

Async RAT payload

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

Enumerates physical storage devices

Unsigned PE

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
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

2024-06-16 14:32

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

2024-06-16 14:32

Reported

2024-06-16 14:35

Platform

win7-20240508-en

Max time kernel

141s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.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\Sysbin.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Sysbin.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Sysbin.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1548 wrote to memory of 1872 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 1872 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 1872 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 1872 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 848 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 848 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 848 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1548 wrote to memory of 848 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1872 wrote to memory of 2656 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 1872 wrote to memory of 2656 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 1872 wrote to memory of 2656 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 1872 wrote to memory of 2656 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 848 wrote to memory of 2820 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 848 wrote to memory of 2820 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 848 wrote to memory of 2820 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 848 wrote to memory of 2820 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 848 wrote to memory of 2900 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 848 wrote to memory of 2900 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 848 wrote to memory of 2900 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 848 wrote to memory of 2900 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe

Processes

C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe

"C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe"

C:\Windows\SysWOW64\cmd.exe

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

C:\Windows\SysWOW64\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp40F6.tmp.bat""

C:\Windows\SysWOW64\schtasks.exe

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

C:\Windows\SysWOW64\timeout.exe

timeout 3

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

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

Network

Country Destination Domain Proto
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:6606 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:8808 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:8808 tcp

Files

memory/1548-0-0x00000000744FE000-0x00000000744FF000-memory.dmp

memory/1548-1-0x0000000000EE0000-0x0000000000EF2000-memory.dmp

memory/1548-2-0x00000000744F0000-0x0000000074BDE000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp40F6.tmp.bat

MD5 0e4b9cef0b8e3d472b59e513763fe6a2
SHA1 fb69a12aac433e1f1e58da525faad1f14bcbeb45
SHA256 e53ddea238669ef8b009189a405688b1d4d94d674b3bb337442020db6b8ff7e9
SHA512 d65e0bc30d7e11074c1273bc9cf86ed0a72f5eb08bf9ff72469fd7d4116f67541bb5a7e143871718b24111d476342d3787ccd97301096c3eb94f3aecfcf72a5b

memory/1548-11-0x00000000744F0000-0x0000000074BDE000-memory.dmp

\Users\Admin\AppData\Roaming\Sysbin.exe

MD5 36b7614f2f6b0788e6c2be5def44c68f
SHA1 0aca41d981fbc11d8eee8d7c668fc68637b4985c
SHA256 f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263
SHA512 b1243336e444127b0931c9cc5ce7e364540dd1fba1d25e9b7384e6d1d6d68036d7ea46b2c56592c20891d2d085af319286eda4eef57c1056bed97abdcb1d2449

memory/2900-16-0x0000000000A80000-0x0000000000A92000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-16 14:32

Reported

2024-06-16 14:35

Platform

win10v2004-20240611-en

Max time kernel

141s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.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-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Sysbin.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Sysbin.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1300 wrote to memory of 3232 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1300 wrote to memory of 3232 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1300 wrote to memory of 3232 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1300 wrote to memory of 4796 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1300 wrote to memory of 4796 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 1300 wrote to memory of 4796 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 3232 wrote to memory of 3096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3232 wrote to memory of 3096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3232 wrote to memory of 3096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 4796 wrote to memory of 448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4796 wrote to memory of 448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4796 wrote to memory of 448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4796 wrote to memory of 2332 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 4796 wrote to memory of 2332 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 4796 wrote to memory of 2332 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe

Processes

C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe

"C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe"

C:\Windows\SysWOW64\cmd.exe

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

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp688D.tmp.bat""

C:\Windows\SysWOW64\schtasks.exe

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

C:\Windows\SysWOW64\timeout.exe

timeout 3

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
VN 61.14.233.130:7707 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 92.12.20.2.in-addr.arpa udp
VN 61.14.233.130:6606 tcp
VN 61.14.233.130:8808 tcp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
VN 61.14.233.130:8808 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:8808 tcp

Files

memory/1300-0-0x00000000752EE000-0x00000000752EF000-memory.dmp

memory/1300-1-0x0000000000050000-0x0000000000062000-memory.dmp

memory/1300-2-0x00000000752E0000-0x0000000075A90000-memory.dmp

memory/1300-3-0x0000000004900000-0x000000000499C000-memory.dmp

memory/1300-8-0x00000000752E0000-0x0000000075A90000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp688D.tmp.bat

MD5 7e9c6d93ca1bfc9133756d8a42ca6457
SHA1 ea39e80122f8ced0dc8488bbc98694e767aecf5e
SHA256 1ebd94476a89fb1c46bc7b227a18b8bcfe1d12586ba293dbc5d408364076f96d
SHA512 966c36e4652628340547df1933862fcca51c137097d8ebf5123a4fc52f0bdaccb77a8f49fe6fd13668e17d1913ca2a8232d4ff6bcceadf769816dc83d49dea5a

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

MD5 36b7614f2f6b0788e6c2be5def44c68f
SHA1 0aca41d981fbc11d8eee8d7c668fc68637b4985c
SHA256 f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263
SHA512 b1243336e444127b0931c9cc5ce7e364540dd1fba1d25e9b7384e6d1d6d68036d7ea46b2c56592c20891d2d085af319286eda4eef57c1056bed97abdcb1d2449

memory/2332-13-0x00000000752E0000-0x0000000075A90000-memory.dmp

memory/2332-14-0x00000000752E0000-0x0000000075A90000-memory.dmp