Malware Analysis Report

2024-11-16 10:50

Sample ID 240614-csveaasajb
Target a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84
SHA256 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84
Tags
evasion
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84

Threat Level: Known bad

The file a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84 was found to be: Known bad.

Malicious Activity Summary

evasion

Detects Windows executables referencing non-Windows User-Agents

Detects Windows executables referencing non-Windows User-Agents

Sets file to hidden

Deletes itself

Executes dropped EXE

Checks computer location settings

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-14 02:20

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 02:20

Reported

2024-06-14 02:23

Platform

win7-20240419-en

Max time kernel

141s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

Sets file to hidden

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

Deletes itself

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\ayahost.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Windows\SysWOW64\attrib.exe N/A
File created C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A

Views/modifies file attributes

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

Processes

C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe

"C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\ayahost.exe

C:\Windows\Debug\ayahost.exe

C:\Windows\Debug\ayahost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A7ECA8~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 0uCooo02gM.nnnn.eu.org udp
US 8.8.8.8:53 HhzNkbauQV.nnnn.eu.org udp
US 8.8.8.8:53 UeKp4wyLJ.nnnn.eu.org udp
US 8.8.8.8:53 h7JHPXJ3lc.nnnn.eu.org udp

Files

memory/3020-0-0x0000000000400000-0x0000000000411000-memory.dmp

C:\Windows\Debug\ayahost.exe

MD5 f09f2ea3fc61ead9ed0995877b1cf347
SHA1 8e316310cf8465f84d2fbc529af054bdece7514d
SHA256 674a2c571da242f804bd51e46ce62b6b6dbff20c132d71cdb9a5ba570fe40b00
SHA512 3012dd52c21688dab8bfebc7d478d354394e8bc5cf9df5324eea7d3ab64906d065a96ab19f9def66b8c0e6cb9a833ba6c5672e1294697821b094eed8169d399f

memory/2984-5-0x0000000000400000-0x0000000000411000-memory.dmp

memory/2984-6-0x0000000000400000-0x0000000000411000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 02:20

Reported

2024-06-14 02:23

Platform

win10v2004-20240508-en

Max time kernel

140s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

Sets file to hidden

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\rgkhost.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\rgkhost.exe C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A
File opened for modification C:\Windows\Debug\rgkhost.exe C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A
File opened for modification C:\Windows\Debug\rgkhost.exe C:\Windows\SysWOW64\attrib.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe N/A

Views/modifies file attributes

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

Processes

C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe

"C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\rgkhost.exe

C:\Windows\Debug\rgkhost.exe

C:\Windows\Debug\rgkhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A7ECA8~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 3kKQ9DpzC.nnnn.eu.org udp
US 8.8.8.8:53 rtYWZ31eD.nnnn.eu.org udp
US 52.111.227.14:443 tcp
US 8.8.8.8:53 7DydSNctOM.nnnn.eu.org udp

Files

memory/3456-0-0x0000000000400000-0x0000000000411000-memory.dmp

C:\Windows\debug\rgkhost.exe

MD5 f1167e3ac008c6264e8e9485df343051
SHA1 79daf063544bec73011b1d0f69fd922b56828a24
SHA256 41b53c9d0de248bc19cd0ce32c13b30c59e4c0c7600ef86cbee3b7fdbe97dd17
SHA512 9d40bd7a0517b971ed97e93fc16dbfc9984ea38ea6c5ae2e32eb733951eaee90666ac8d20cc244639b1de909c0cf3c945306ce0120c0e48285ce496652895083

memory/3792-5-0x0000000000400000-0x0000000000411000-memory.dmp

memory/3792-6-0x0000000000400000-0x0000000000411000-memory.dmp