Malware Analysis Report

2024-12-06 03:02

Sample ID 241117-y9rwdasncq
Target ce5e42f0fcf922784f683fe3c24cb48affbebcaf7b23c88dc5f782d074354036
SHA256 ce5e42f0fcf922784f683fe3c24cb48affbebcaf7b23c88dc5f782d074354036
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: 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

ce5e42f0fcf922784f683fe3c24cb48affbebcaf7b23c88dc5f782d074354036

Threat Level: Known bad

The file ce5e42f0fcf922784f683fe3c24cb48affbebcaf7b23c88dc5f782d074354036 was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Program Files directory

Drops file in Windows directory

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-17 20:29

Signatures

Unsigned PE

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

2024-11-17 20:29

Reported

2024-11-17 20:32

Platform

win10v2004-20241007-en

Max time kernel

96s

Max time network

140s

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 1420 wrote to memory of 4716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1420 wrote to memory of 4716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1420 wrote to memory of 4716 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 4716 -ip 4716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 101.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-17 20:29

Reported

2024-11-17 20:32

Platform

win7-20241023-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe"

Signatures

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\nomarch\gratiales.ini C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Fonts\Gullis.lnk C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A
File opened for modification C:\Windows\Fonts\Gullis.lnk C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A
File created C:\Windows\Fonts\Iskagerne227.lnk C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.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\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe

"C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsj6D74.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

C:\Windows\Fonts\Gullis.lnk

MD5 0a0c92e81dd488972878fbbff8a80344
SHA1 1005aa031f106262fe0fa9dcef9e07dbf619764b
SHA256 72eb39d12bb3fe887b58688797a996630ca76cf7d7dc98f94f5c7d99274178eb
SHA512 f111fa6d7a6103b281e79fc3b7340cf1bf50b3471732a209295c884a6c7d6c9f6feafee1ee963ec9719a3b7700b4ec5d3a20511e02ab3b3bd2a0c8514db4074e

memory/2244-20-0x0000000002D90000-0x0000000005C7A000-memory.dmp

memory/2244-21-0x0000000002D90000-0x0000000005C7A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-17 20:29

Reported

2024-11-17 20:32

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

141s

Command Line

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

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\nomarch\gratiales.ini C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Fonts\Gullis.lnk C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A
File opened for modification C:\Windows\Fonts\Gullis.lnk C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.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\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious behavior: MapViewOfSection

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

Processes

C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe

"C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe"

C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe

"C:\Users\Admin\AppData\Local\Temp\Purchase Order Purchase Order Purchase Order Purchase Order.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 180.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
NL 185.222.57.90:80 185.222.57.90 tcp
US 8.8.8.8:53 90.57.222.185.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsd8F02.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

C:\Windows\Fonts\Gullis.lnk

MD5 955d040ac661a1077248766694da6e1f
SHA1 d6b227c31e29cde880bcddbf2003647a8eacd696
SHA256 42ee8b020affe3880a95de2dae547216a222fa719db844a59aa065e714a71ca5
SHA512 0e23361f919814b55a3ec9f2c52a5559d63830639d81c0d45cde7d0bb36434ae102d260f2a91f1930ff8bdbf16b6c5daeefc02f670985e62b8fbdaa4076dbf6e

memory/4008-18-0x0000000002A80000-0x000000000596A000-memory.dmp

memory/4008-19-0x0000000076FF1000-0x0000000077111000-memory.dmp

memory/4008-20-0x0000000002A80000-0x000000000596A000-memory.dmp

memory/436-21-0x0000000000400000-0x0000000001654000-memory.dmp

memory/436-22-0x0000000001660000-0x000000000454A000-memory.dmp

memory/436-23-0x0000000000400000-0x0000000001654000-memory.dmp

memory/436-24-0x0000000000400000-0x0000000001654000-memory.dmp

memory/436-25-0x0000000001660000-0x000000000454A000-memory.dmp

memory/436-26-0x0000000000400000-0x0000000001654000-memory.dmp

memory/436-27-0x0000000000400000-0x0000000001654000-memory.dmp

memory/436-30-0x0000000000400000-0x0000000001654000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-17 20:29

Reported

2024-11-17 20:32

Platform

win7-20240903-en

Max time kernel

122s

Max time network

124s

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 2668 -s 220

Network

N/A

Files

N/A