Malware Analysis Report

2024-11-13 17:38

Sample ID 241107-d1lb1sxjbp
Target ecf0f23b171f136fd346cd1943b9992486805e1546a8ce61dc4d855fe71c0820.zip
SHA256 ecf0f23b171f136fd346cd1943b9992486805e1546a8ce61dc4d855fe71c0820
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

ecf0f23b171f136fd346cd1943b9992486805e1546a8ce61dc4d855fe71c0820

Threat Level: Known bad

The file ecf0f23b171f136fd346cd1943b9992486805e1546a8ce61dc4d855fe71c0820.zip was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-07 03:28

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

2024-11-07 03:28

Reported

2024-11-07 03:31

Platform

win7-20241010-en

Max time kernel

150s

Max time network

152s

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

Files

\Users\Admin\AppData\Local\Temp\nso497F.tmp\System.dll

MD5 be2621a78a13a56cf09e00dd98488360
SHA1 75f0539dc6af200a07cdb056cddddec595c6cfd2
SHA256 852047023ba0cae91c7a43365878613cfb4e64e36ff98c460e113d5088d68ef5
SHA512 b80cf1f678e6885276b9a1bfd9227374b2eb9e38bb20446d52ebe2c3dba89764aa50cb4d49df51a974478f3364b5dbcbc5b4a16dc8f1123b40c89c01725be3d1

memory/2388-31-0x0000000002FD0000-0x0000000004575000-memory.dmp

memory/2388-32-0x0000000002FD0000-0x0000000004575000-memory.dmp

memory/2388-33-0x00000000775C1000-0x00000000776C2000-memory.dmp

memory/2388-34-0x00000000775C0000-0x0000000077769000-memory.dmp

memory/2388-35-0x0000000002FD0000-0x0000000004575000-memory.dmp

memory/2904-37-0x00000000775C0000-0x0000000077769000-memory.dmp

memory/2904-36-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2904-39-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-07 03:28

Reported

2024-11-07 03:31

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

145s

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 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.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 r10.o.lencr.org udp
GB 2.23.210.82:80 r10.o.lencr.org tcp
US 8.8.8.8:53 185.100.27.69.in-addr.arpa udp
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 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 100.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsoB557.tmp\System.dll

MD5 be2621a78a13a56cf09e00dd98488360
SHA1 75f0539dc6af200a07cdb056cddddec595c6cfd2
SHA256 852047023ba0cae91c7a43365878613cfb4e64e36ff98c460e113d5088d68ef5
SHA512 b80cf1f678e6885276b9a1bfd9227374b2eb9e38bb20446d52ebe2c3dba89764aa50cb4d49df51a974478f3364b5dbcbc5b4a16dc8f1123b40c89c01725be3d1

memory/3136-31-0x00000000041F0000-0x0000000005795000-memory.dmp

memory/3136-32-0x00000000775D1000-0x00000000776F1000-memory.dmp

memory/3136-33-0x0000000010004000-0x0000000010005000-memory.dmp

memory/3136-35-0x00000000041F0000-0x0000000005795000-memory.dmp

memory/2208-34-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2208-36-0x0000000001660000-0x0000000002C05000-memory.dmp

memory/2208-37-0x0000000077658000-0x0000000077659000-memory.dmp

memory/2208-38-0x0000000077675000-0x0000000077676000-memory.dmp

memory/2208-45-0x0000000001660000-0x0000000002C05000-memory.dmp

memory/2208-46-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2208-47-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2208-48-0x00000000775D1000-0x00000000776F1000-memory.dmp

memory/2208-49-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2208-50-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2208-53-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2208-54-0x0000000001660000-0x0000000002C05000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-07 03:28

Reported

2024-11-07 03:31

Platform

win7-20241023-en

Max time kernel

120s

Max time network

123s

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 1872 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-07 03:28

Reported

2024-11-07 03:31

Platform

win10v2004-20241007-en

Max time kernel

92s

Max time network

139s

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 2080 wrote to memory of 848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2080 wrote to memory of 848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2080 wrote to memory of 848 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 848 -ip 848

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 848 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 106.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

N/A