Malware Analysis Report

2024-12-06 03:26

Sample ID 241029-tg7nxaxpfj
Target 29102024_1556_29102024_Doc.rar
SHA256 154b351316b313b40bb9a95675e069b13472e30b8aa96f02c2dbf16cb0ca099c
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

154b351316b313b40bb9a95675e069b13472e30b8aa96f02c2dbf16cb0ca099c

Threat Level: Known bad

The file 29102024_1556_29102024_Doc.rar 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

Program crash

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-29 16:02

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 16:02

Reported

2024-10-29 16:05

Platform

win7-20241010-en

Max time kernel

143s

Max time network

142s

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 2904 set thread context of 2192 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\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
File opened for modification C:\Windows\Fonts\Spodium39.int 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 142.250.179.227:80 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\nsz5D00.tmp\System.dll

MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

memory/2904-20-0x0000000002C70000-0x00000000059F8000-memory.dmp

memory/2904-21-0x0000000002C70000-0x00000000059F8000-memory.dmp

memory/2904-23-0x0000000076E40000-0x0000000076FE9000-memory.dmp

memory/2904-22-0x0000000076E41000-0x0000000076F42000-memory.dmp

memory/2192-25-0x0000000076E40000-0x0000000076FE9000-memory.dmp

memory/2192-24-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2904-26-0x0000000002C70000-0x00000000059F8000-memory.dmp

memory/2192-29-0x0000000076E40000-0x0000000076FE9000-memory.dmp

memory/2192-28-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2192-51-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2192-53-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2192-52-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-29 16:02

Reported

2024-10-29 16:05

Platform

win10v2004-20241007-en

Max time kernel

141s

Max time network

146s

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 1000 set thread context of 1920 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\brunsttiderne.tri C:\Users\Admin\AppData\Local\Temp\Forreste.exe N/A
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

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 8.8.8.8.in-addr.arpa udp
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 58.55.71.13.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 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.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 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 73.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.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

Files

C:\Users\Admin\AppData\Local\Temp\nsz8406.tmp\System.dll

MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

memory/1000-18-0x00000000031D0000-0x0000000005F58000-memory.dmp

memory/1000-19-0x00000000031D0000-0x0000000005F58000-memory.dmp

memory/1000-20-0x0000000077791000-0x00000000778B1000-memory.dmp

memory/1000-21-0x0000000077791000-0x00000000778B1000-memory.dmp

memory/1000-22-0x0000000010004000-0x0000000010005000-memory.dmp

memory/1920-23-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1000-24-0x00000000031D0000-0x0000000005F58000-memory.dmp

memory/1920-25-0x0000000001660000-0x00000000043E8000-memory.dmp

memory/1920-38-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1920-39-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1920-40-0x0000000001660000-0x00000000043E8000-memory.dmp

memory/1920-41-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1920-42-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1920-43-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1920-46-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1920-47-0x0000000001660000-0x00000000043E8000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-29 16:02

Reported

2024-10-29 16:05

Platform

win7-20241010-en

Max time kernel

117s

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 2424 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-29 16:02

Reported

2024-10-29 16:05

Platform

win10v2004-20241007-en

Max time kernel

130s

Max time network

138s

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 3968 wrote to memory of 2232 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3968 wrote to memory of 2232 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3968 wrote to memory of 2232 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 420 -p 2232 -ip 2232

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2232 -s 612

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 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 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.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
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.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