Malware Analysis Report

2024-12-06 03:27

Sample ID 241029-yce6baxmgw
Target 0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4
SHA256 0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4
Tags
discovery guloader downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral6

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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 Overview

score
10/10

SHA256

0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4

Threat Level: Known bad

The file 0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4 was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Program crash

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-29 19:38

Signatures

Unsigned PE

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

NSIS installer

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

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-29 19:38

Reported

2024-10-29 19:40

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

159s

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 4500 wrote to memory of 4988 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4500 wrote to memory of 4988 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4500 wrote to memory of 4988 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 4988 -ip 4988

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.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 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 73.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 69.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 71.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 10.173.189.20.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-10-29 19:38

Reported

2024-10-29 19:38

Platform

win7-20240903-en

Max time kernel

0s

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

N/A

Files

N/A

Analysis: behavioral6

Detonation Overview

Submitted

2024-10-29 19:38

Reported

2024-10-29 19:38

Platform

win10v2004-20241007-en

Max time kernel

0s

Max time network

2s

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-29 19:38

Reported

2024-10-29 19:40

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\brakehand.Inf120 C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.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\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2400 wrote to memory of 2916 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
PID 2400 wrote to memory of 2916 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
PID 2400 wrote to memory of 2916 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
PID 2400 wrote to memory of 2916 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
PID 2400 wrote to memory of 2916 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
PID 2400 wrote to memory of 2916 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
PID 2916 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Windows\SysWOW64\WerFault.exe
PID 2916 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Windows\SysWOW64\WerFault.exe
PID 2916 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Windows\SysWOW64\WerFault.exe
PID 2916 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"

C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2916 -s 696

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.180.3:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.180.3:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.187.193:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.18.190.80:80 crl.microsoft.com tcp

Files

\Users\Admin\AppData\Local\Temp\nst78F8.tmp\System.dll

MD5 4d3b19a81bd51f8ce44b93643a4e3a99
SHA1 35f8b00e85577b014080df98bd2c378351d9b3e9
SHA256 fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce
SHA512 b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

memory/2400-13-0x00000000036F0000-0x00000000053E7000-memory.dmp

memory/2400-15-0x0000000077800000-0x00000000779A9000-memory.dmp

memory/2400-14-0x0000000077801000-0x0000000077902000-memory.dmp

memory/2400-16-0x00000000036F0000-0x00000000053E7000-memory.dmp

memory/2400-17-0x00000000036F0000-0x00000000053E7000-memory.dmp

memory/2916-18-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2916-19-0x0000000077800000-0x00000000779A9000-memory.dmp

memory/2916-41-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2916-42-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-29 19:38

Reported

2024-10-29 19:40

Platform

win10v2004-20241007-en

Max time kernel

131s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\brakehand.Inf120 C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.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\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"

C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2460 -ip 2460

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2460 -s 1552

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 67.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.180.3:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.180.3:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.187.193:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 67.204.58.216.in-addr.arpa udp
US 8.8.8.8:53 3.180.250.142.in-addr.arpa udp
US 8.8.8.8:53 193.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 99.209.201.84.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 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsi826F.tmp\System.dll

MD5 4d3b19a81bd51f8ce44b93643a4e3a99
SHA1 35f8b00e85577b014080df98bd2c378351d9b3e9
SHA256 fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce
SHA512 b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

memory/2852-12-0x0000000003080000-0x0000000004D77000-memory.dmp

memory/2852-13-0x0000000003080000-0x0000000004D77000-memory.dmp

memory/2852-14-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

memory/2852-15-0x0000000010004000-0x0000000010005000-memory.dmp

memory/2460-16-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2852-17-0x0000000003080000-0x0000000004D77000-memory.dmp

memory/2460-18-0x0000000001660000-0x0000000003357000-memory.dmp

memory/2460-19-0x0000000077B28000-0x0000000077B29000-memory.dmp

memory/2460-20-0x0000000077B45000-0x0000000077B46000-memory.dmp

memory/2460-33-0x0000000001660000-0x0000000003357000-memory.dmp

memory/2460-34-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2460-35-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2460-36-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2460-37-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

memory/2460-38-0x0000000001660000-0x0000000003357000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-29 19:38

Reported

2024-10-29 19:40

Platform

win7-20240708-en

Max time kernel

118s

Max time network

119s

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 1452 -s 224

Network

N/A

Files

N/A