Malware Analysis Report

2024-11-13 17:38

Sample ID 241108-caabdsserr
Target e721cfa7c653086d836c6532c825ef23.bin
SHA256 0faa4fbf5739c26210d53eb047808c8b7f21e16f74d917ccd4361148436b3929
Tags
guloader discovery downloader
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

0faa4fbf5739c26210d53eb047808c8b7f21e16f74d917ccd4361148436b3929

Threat Level: Known bad

The file e721cfa7c653086d836c6532c825ef23.bin was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-08 01:51

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-08 01:51

Reported

2024-11-08 01:54

Platform

win7-20241010-en

Max time kernel

148s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

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\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe"

C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.evolutioncosmetics.com udp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp

Files

\Users\Admin\AppData\Local\Temp\nseEBB7.tmp\System.dll

MD5 be2621a78a13a56cf09e00dd98488360
SHA1 75f0539dc6af200a07cdb056cddddec595c6cfd2
SHA256 852047023ba0cae91c7a43365878613cfb4e64e36ff98c460e113d5088d68ef5
SHA512 b80cf1f678e6885276b9a1bfd9227374b2eb9e38bb20446d52ebe2c3dba89764aa50cb4d49df51a974478f3364b5dbcbc5b4a16dc8f1123b40c89c01725be3d1

memory/2448-31-0x0000000003190000-0x0000000004735000-memory.dmp

memory/2448-32-0x0000000003190000-0x0000000004735000-memory.dmp

memory/2448-33-0x00000000772F1000-0x00000000773F2000-memory.dmp

memory/2448-34-0x00000000772F0000-0x0000000077499000-memory.dmp

memory/2448-35-0x0000000003190000-0x0000000004735000-memory.dmp

memory/2176-37-0x00000000772F0000-0x0000000077499000-memory.dmp

memory/2176-36-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2176-39-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-08 01:51

Reported

2024-11-08 01:54

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.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\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe"

C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\Letter of Intent (LOI) For the Company November 2024 PDF.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 72.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 www.evolutioncosmetics.com udp
CA 69.27.100.185:443 www.evolutioncosmetics.com tcp
US 8.8.8.8:53 185.100.27.69.in-addr.arpa udp
US 8.8.8.8:53 r10.o.lencr.org udp
GB 2.23.210.82:80 r10.o.lencr.org tcp
US 8.8.8.8:53 32.169.19.2.in-addr.arpa udp
US 8.8.8.8:53 82.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsp8638.tmp\System.dll

MD5 be2621a78a13a56cf09e00dd98488360
SHA1 75f0539dc6af200a07cdb056cddddec595c6cfd2
SHA256 852047023ba0cae91c7a43365878613cfb4e64e36ff98c460e113d5088d68ef5
SHA512 b80cf1f678e6885276b9a1bfd9227374b2eb9e38bb20446d52ebe2c3dba89764aa50cb4d49df51a974478f3364b5dbcbc5b4a16dc8f1123b40c89c01725be3d1

memory/3864-31-0x00000000041D0000-0x0000000005775000-memory.dmp

memory/3864-32-0x0000000077AF1000-0x0000000077C11000-memory.dmp

memory/3864-33-0x0000000010004000-0x0000000010005000-memory.dmp

memory/3864-35-0x00000000041D0000-0x0000000005775000-memory.dmp

memory/4072-34-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4072-36-0x0000000001660000-0x0000000002C05000-memory.dmp

memory/4072-37-0x0000000077B78000-0x0000000077B79000-memory.dmp

memory/4072-38-0x0000000077B95000-0x0000000077B96000-memory.dmp

memory/4072-45-0x0000000001660000-0x0000000002C05000-memory.dmp

memory/4072-46-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4072-47-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4072-48-0x0000000077AF1000-0x0000000077C11000-memory.dmp

memory/4072-49-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4072-52-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4072-53-0x0000000001660000-0x0000000002C05000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-08 01:51

Reported

2024-11-08 01:54

Platform

win7-20241010-en

Max time kernel

66s

Max time network

22s

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 2808 -s 228

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-08 01:51

Reported

2024-11-08 01:54

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

141s

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 4396 wrote to memory of 964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4396 wrote to memory of 964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4396 wrote to memory of 964 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 424 -p 964 -ip 964

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 964 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp

Files

N/A