Malware Analysis Report

2024-12-06 03:17

Sample ID 241029-n6e3asvfnq
Target Forreste.exe
SHA256 0c3b34493099cbbfbf51b25a4befe93e8d1b92008884500f91c66e2bd00dee1f
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

0c3b34493099cbbfbf51b25a4befe93e8d1b92008884500f91c66e2bd00dee1f

Threat Level: Known bad

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

Malicious Activity Summary

guloader discovery downloader

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Program Files directory

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 12:00

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: behavioral1

Detonation Overview

Submitted

2024-10-29 12:00

Reported

2024-10-29 12:02

Platform

win7-20241023-en

Max time kernel

119s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Forreste.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\Forreste.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A

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\Forreste.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1784 set thread context of 2804 N/A C:\Users\Admin\AppData\Local\Temp\Forreste.exe C:\Users\Admin\AppData\Local\Temp\Forreste.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\Reoil.mul C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Fonts\Spodium39.int C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\Belringernes\Dermatophony.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\resources\nringsmiddelet.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\resources\stenhjsplanternes\fordreves.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\Fonts\karrooers.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\Fonts\brunsttiderne.tri C:\Users\Admin\AppData\Local\Temp\Forreste.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\Forreste.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

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

Files

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

MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

memory/1784-20-0x0000000003600000-0x0000000006388000-memory.dmp

memory/1784-21-0x0000000003600000-0x0000000006388000-memory.dmp

memory/1784-23-0x0000000077481000-0x0000000077582000-memory.dmp

memory/1784-22-0x0000000077670000-0x0000000077746000-memory.dmp

memory/1784-24-0x0000000077480000-0x0000000077629000-memory.dmp

memory/1784-25-0x0000000003600000-0x0000000006388000-memory.dmp

memory/2804-26-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2804-27-0x0000000077480000-0x0000000077629000-memory.dmp

memory/2804-48-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2804-49-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2804-51-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2804-50-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2804-52-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2804-59-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-29 12:00

Reported

2024-10-29 12:02

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Forreste.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\Forreste.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A

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\Forreste.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3748 set thread context of 8 N/A C:\Users\Admin\AppData\Local\Temp\Forreste.exe C:\Users\Admin\AppData\Local\Temp\Forreste.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\Reoil.mul C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Fonts\Spodium39.int C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\Belringernes\Dermatophony.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\resources\nringsmiddelet.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\resources\stenhjsplanternes\fordreves.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\Fonts\karrooers.ini C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
File opened for modification C:\Windows\Fonts\brunsttiderne.tri C:\Users\Admin\AppData\Local\Temp\Forreste.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\Forreste.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 154.239.44.20.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 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.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 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 3.180.250.142.in-addr.arpa udp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.187.193:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 193.187.250.142.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 73.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

C:\Users\Admin\AppData\Local\Temp\nsj76F6.tmp\System.dll

MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

memory/3748-18-0x0000000003190000-0x0000000005F18000-memory.dmp

memory/3748-19-0x0000000003190000-0x0000000005F18000-memory.dmp

memory/3748-20-0x0000000077091000-0x00000000771B1000-memory.dmp

memory/3748-21-0x0000000010004000-0x0000000010005000-memory.dmp

memory/3748-22-0x0000000003190000-0x0000000005F18000-memory.dmp

memory/8-23-0x0000000000400000-0x0000000001654000-memory.dmp

memory/8-24-0x0000000001660000-0x00000000043E8000-memory.dmp

memory/8-37-0x0000000000400000-0x0000000001654000-memory.dmp

memory/8-38-0x0000000000400000-0x0000000001654000-memory.dmp

memory/8-39-0x0000000001660000-0x00000000043E8000-memory.dmp

memory/8-40-0x0000000000400000-0x0000000001654000-memory.dmp

memory/8-41-0x0000000000400000-0x0000000001654000-memory.dmp

memory/8-44-0x0000000000400000-0x0000000001654000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-29 12:00

Reported

2024-10-29 12:02

Platform

win7-20241010-en

Max time kernel

13s

Max time network

19s

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 2384 -s 228

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-29 12:00

Reported

2024-10-29 12:02

Platform

win10v2004-20241007-en

Max time kernel

133s

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 3656 wrote to memory of 4264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3656 wrote to memory of 4264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3656 wrote to memory of 4264 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 4264 -ip 4264

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4264 -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 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 138.201.86.20.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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

Files

N/A