Malware Analysis Report

2024-09-22 06:57

Sample ID 240617-bqbcysxfna
Target 36b7614f2f6b0788e6c2be5def44c68f.bin
SHA256 842f83e6ba429b2f09bf50de8aca1b5d9ca9a78b00ee09087dd6c518852b0446
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

842f83e6ba429b2f09bf50de8aca1b5d9ca9a78b00ee09087dd6c518852b0446

Threat Level: Known bad

The file 36b7614f2f6b0788e6c2be5def44c68f.bin was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Async RAT payload

Asyncrat family

Async RAT payload

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-17 01:20

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

2024-06-17 01:20

Reported

2024-06-17 01:23

Platform

win10v2004-20240508-en

Max time kernel

149s

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\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 4084 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 4084 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 4084 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 4084 wrote to memory of 3504 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 4084 wrote to memory of 3504 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 4084 wrote to memory of 3504 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 3504 wrote to memory of 3216 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3504 wrote to memory of 3216 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3504 wrote to memory of 3216 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2964 wrote to memory of 1036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2964 wrote to memory of 1036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2964 wrote to memory of 1036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3504 wrote to memory of 3096 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 3504 wrote to memory of 3096 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 3504 wrote to memory of 3096 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\tmp4594.tmp.bat""

C:\Windows\SysWOW64\timeout.exe

timeout 3

C:\Windows\SysWOW64\schtasks.exe

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

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 8.8.8.8.in-addr.arpa udp
VN 61.14.233.130:8808 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:6606 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:6606 tcp

Files

memory/4084-0-0x0000000074C4E000-0x0000000074C4F000-memory.dmp

memory/4084-1-0x0000000000A20000-0x0000000000A32000-memory.dmp

memory/4084-2-0x0000000074C40000-0x00000000753F0000-memory.dmp

memory/4084-3-0x0000000005470000-0x000000000550C000-memory.dmp

memory/4084-8-0x0000000074C40000-0x00000000753F0000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp4594.tmp.bat

MD5 6a93f4469c686a70942408121361e3cb
SHA1 ff13fafce97f1eb117a5766da2165777103c5a88
SHA256 70e72533f0203c2bd5f5ee4b0f3ae6f5c15ee36a16fb8725d22dd791b2464fc1
SHA512 5a41e1d23df1656b1bd3080658af5fd57d8b60d7546a6dc3127036cd3aa6f6e87c927a388a8f8ff3dfc6e67c01720f57ab5214ac529f011bccb039a71190c030

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

MD5 36b7614f2f6b0788e6c2be5def44c68f
SHA1 0aca41d981fbc11d8eee8d7c668fc68637b4985c
SHA256 f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263
SHA512 b1243336e444127b0931c9cc5ce7e364540dd1fba1d25e9b7384e6d1d6d68036d7ea46b2c56592c20891d2d085af319286eda4eef57c1056bed97abdcb1d2449

memory/3096-13-0x0000000074C40000-0x00000000753F0000-memory.dmp

memory/3096-14-0x0000000074C40000-0x00000000753F0000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-17 01:20

Reported

2024-06-17 01:23

Platform

win7-20240508-en

Max time kernel

141s

Max time network

151s

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 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 2372 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2372 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263.exe C:\Windows\SysWOW64\cmd.exe
PID 2428 wrote to memory of 2368 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2428 wrote to memory of 2368 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2428 wrote to memory of 2368 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2428 wrote to memory of 2368 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2820 wrote to memory of 2076 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2820 wrote to memory of 2076 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2820 wrote to memory of 2076 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2820 wrote to memory of 2076 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2820 wrote to memory of 2696 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 2820 wrote to memory of 2696 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 2820 wrote to memory of 2696 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Sysbin.exe
PID 2820 wrote to memory of 2696 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\tmp28D5.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 61.14.233.130:8808 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:7707 tcp
VN 61.14.233.130:8808 tcp

Files

memory/2372-1-0x0000000000C10000-0x0000000000C22000-memory.dmp

memory/2372-0-0x00000000747AE000-0x00000000747AF000-memory.dmp

memory/2372-2-0x00000000747A0000-0x0000000074E8E000-memory.dmp

memory/2372-12-0x00000000747A0000-0x0000000074E8E000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp28D5.tmp.bat

MD5 a3627e13813e822f06ccbc8e6ba2ec43
SHA1 9c60cccc8f33a1460ba107f06e7941fbf3824909
SHA256 7a5543aad5308d47bfdcd42f1657b689525b63e451d478129fd9115d78164475
SHA512 ff614df12920426b026abe832e8d60ef09f90820800af360e84c780fc5117a8bfc9da1b216bcf73e39f5c7f9eeeea256a16cdd76eafa73c69d4ad528427ed945

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

MD5 36b7614f2f6b0788e6c2be5def44c68f
SHA1 0aca41d981fbc11d8eee8d7c668fc68637b4985c
SHA256 f5efd1b435706c4eb87582528b1f34825765cc5324f768a93d763b31642f8263
SHA512 b1243336e444127b0931c9cc5ce7e364540dd1fba1d25e9b7384e6d1d6d68036d7ea46b2c56592c20891d2d085af319286eda4eef57c1056bed97abdcb1d2449

memory/2696-16-0x0000000000050000-0x0000000000062000-memory.dmp