Malware Analysis Report

2024-10-23 19:27

Sample ID 240628-xjl2rsyfrf
Target file.exe
SHA256 de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4
Tags
asyncrat default persistence 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

de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4

Threat Level: Known bad

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

Malicious Activity Summary

asyncrat default persistence rat

Modifies WinLogon for persistence

AsyncRat

Drops startup file

Checks computer location settings

Adds Run key to start application

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Enumerates physical storage devices

Program crash

Delays execution with timeout.exe

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-28 18:53

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-28 18:53

Reported

2024-06-28 18:55

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

151s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe\"" C:\Users\Admin\AppData\Local\Temp\file.exe 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\file.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe" C:\Users\Admin\AppData\Local\Temp\file.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\file.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe" C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3616 set thread context of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\file.exe

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\file.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\file.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3616 wrote to memory of 3920 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3616 wrote to memory of 3920 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3616 wrote to memory of 3920 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3920 wrote to memory of 2036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3920 wrote to memory of 2036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3920 wrote to memory of 2036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3616 wrote to memory of 4504 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout 1

C:\Windows\SysWOW64\timeout.exe

timeout 1

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3616 -ip 3616

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3616 -s 1128

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 hgjvhnfgg.duckdns.org udp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
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
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 hgjvhnfgg.duckdns.org udp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
US 8.8.8.8:53 10.173.189.20.in-addr.arpa udp

Files

memory/3616-0-0x0000000074F2E000-0x0000000074F2F000-memory.dmp

memory/3616-1-0x00000000004E0000-0x00000000005BC000-memory.dmp

memory/3616-2-0x0000000004F30000-0x0000000004FCC000-memory.dmp

memory/3616-3-0x0000000074F20000-0x00000000756D0000-memory.dmp

memory/3616-4-0x00000000050D0000-0x00000000050F8000-memory.dmp

memory/3616-5-0x00000000056B0000-0x0000000005C54000-memory.dmp

memory/4504-7-0x0000000000400000-0x0000000000412000-memory.dmp

memory/4504-8-0x0000000074F20000-0x00000000756D0000-memory.dmp

memory/3616-9-0x0000000074F20000-0x00000000756D0000-memory.dmp

memory/4504-10-0x0000000074F20000-0x00000000756D0000-memory.dmp

memory/4504-11-0x0000000074F20000-0x00000000756D0000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-28 18:53

Reported

2024-06-28 18:55

Platform

win7-20240221-en

Max time kernel

136s

Max time network

146s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe\"" C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\file.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe" C:\Users\Admin\AppData\Local\Temp\file.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe" C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3016 set thread context of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe

Enumerates physical storage devices

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\file.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\file.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\file.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3016 wrote to memory of 3012 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3016 wrote to memory of 3012 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3016 wrote to memory of 3012 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3016 wrote to memory of 3012 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\cmd.exe
PID 3012 wrote to memory of 2608 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3012 wrote to memory of 2608 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3012 wrote to memory of 2608 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3012 wrote to memory of 2608 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3016 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe
PID 3016 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\file.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout 1

C:\Windows\SysWOW64\timeout.exe

timeout 1

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 hgjvhnfgg.duckdns.org udp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
US 8.8.8.8:53 hgjvhnfgg.duckdns.org udp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp
CO 177.255.91.168:8057 hgjvhnfgg.duckdns.org tcp

Files

memory/3016-0-0x00000000744EE000-0x00000000744EF000-memory.dmp

memory/3016-1-0x0000000000010000-0x00000000000EC000-memory.dmp

memory/3016-2-0x00000000744E0000-0x0000000074BCE000-memory.dmp

memory/3016-3-0x00000000005E0000-0x0000000000608000-memory.dmp

memory/2528-5-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2528-11-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2528-15-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2528-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2528-19-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2528-17-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2528-9-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2528-7-0x0000000000400000-0x0000000000412000-memory.dmp

memory/3016-20-0x0000000000400000-0x0000000000500000-memory.dmp

memory/3016-21-0x00000000744E0000-0x0000000074BCE000-memory.dmp