Malware Analysis Report

2024-11-15 09:59

Sample ID 241111-vzb6dsseqh
Target PolysealsSdnBhdStatementReceipts1111.exe
SHA256 18bfaa34bea9797ca82ffa02adc900f70ad24ad9663afacf0d963ff41d3a0c17
Tags
guloader discovery downloader persistence upx
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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

18bfaa34bea9797ca82ffa02adc900f70ad24ad9663afacf0d963ff41d3a0c17

Threat Level: Known bad

The file PolysealsSdnBhdStatementReceipts1111.exe was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader persistence upx

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Blocklisted process makes network request

Adds Run key to start application

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

UPX packed file

Suspicious use of SetThreadContext

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 17:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-11 17:25

Reported

2024-11-11 17:27

Platform

win7-20240708-en

Max time kernel

146s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\licensed = "C:\\Users\\Admin\\AppData\\Roaming\\Afsoege\\Bedrooms.exe" C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2028 set thread context of 2888 N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe C:\Windows\SysWOW64\msiexec.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Internationalen\warping.ini C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe

"C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe"

C:\Windows\SysWOW64\msiexec.exe

"C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.onedrive.com udp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsj368D.tmp\System.dll

MD5 cff85c549d536f651d4fb8387f1976f2
SHA1 d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
SHA512 531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

memory/2028-13-0x0000000003F90000-0x00000000051C0000-memory.dmp

memory/2028-15-0x0000000077B90000-0x0000000077D39000-memory.dmp

memory/2028-14-0x0000000077B91000-0x0000000077C92000-memory.dmp

memory/2888-17-0x0000000077B90000-0x0000000077D39000-memory.dmp

memory/2028-16-0x0000000003F90000-0x00000000051C0000-memory.dmp

memory/2888-19-0x0000000000400000-0x0000000000581000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab7ABD.tmp

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

C:\Users\Admin\AppData\Local\Temp\Tar7AD0.tmp

MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 17:25

Reported

2024-11-11 17:27

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\licensed = "C:\\Users\\Admin\\AppData\\Roaming\\Afsoege\\Bedrooms.exe" C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

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

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4524 set thread context of 2096 N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe C:\Windows\SysWOW64\msiexec.exe

UPX packed file

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

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Internationalen\warping.ini C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe

"C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe"

C:\Windows\SysWOW64\msiexec.exe

"C:\Users\Admin\AppData\Local\Temp\PolysealsSdnBhdStatementReceipts1111.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 api.onedrive.com udp
US 13.107.42.12:443 api.onedrive.com tcp
US 8.8.8.8:53 odln1q.am.files.1drv.com udp
US 13.107.42.12:443 odln1q.am.files.1drv.com tcp
US 8.8.8.8:53 olufem.ddns.net udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 12.42.107.13.in-addr.arpa udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 olufem.ddns.net udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp
US 8.8.8.8:53 olufem.ddns.net udp
AU 103.47.146.161:3210 olufem.ddns.net tcp
AU 103.47.146.161:3210 olufem.ddns.net tcp

Files

C:\Users\Admin\AppData\Local\Temp\nsh97DD.tmp\System.dll

MD5 cff85c549d536f651d4fb8387f1976f2
SHA1 d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
SHA512 531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

memory/4524-12-0x0000000005300000-0x0000000006530000-memory.dmp

memory/4524-13-0x00000000775A1000-0x00000000776C1000-memory.dmp

memory/4524-14-0x00000000741F5000-0x00000000741F6000-memory.dmp

memory/4524-15-0x0000000005300000-0x0000000006530000-memory.dmp

memory/2096-16-0x0000000000EB0000-0x00000000020E0000-memory.dmp

memory/2096-17-0x0000000077628000-0x0000000077629000-memory.dmp

memory/2096-18-0x00000000775A1000-0x00000000776C1000-memory.dmp

memory/2096-20-0x0000000000EB0000-0x00000000020E0000-memory.dmp

memory/2096-24-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/2096-25-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/2096-28-0x00000000775A1000-0x00000000776C1000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-11 17:25

Reported

2024-11-11 17:27

Platform

win7-20240729-en

Max time kernel

117s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1440 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-11 17:25

Reported

2024-11-11 17:27

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

137s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4040 wrote to memory of 1212 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4040 wrote to memory of 1212 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4040 wrote to memory of 1212 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1212 -ip 1212

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1212 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

N/A