Malware Analysis Report

2024-12-06 03:02

Sample ID 241119-v4y6qazbqm
Target 457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
SHA256 457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13
Tags
discovery guloader 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

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13

Threat Level: Known bad

The file 457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Program Files directory

Drops file in Windows directory

Unsigned PE

Program crash

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-19 17:33

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

2024-11-19 17:33

Reported

2024-11-19 17:35

Platform

win7-20240903-en

Max time kernel

119s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A
File opened for modification C:\Windows\Fonts\Gullis.lnk C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A
File created C:\Windows\Fonts\Iskagerne227.lnk C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

"C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsoEC53.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

C:\Windows\Fonts\Gullis.lnk

MD5 3273956bf1dadfbb25c69dbf1792d8a2
SHA1 79ec6814d8714e5365b058e14060953ac9a3569a
SHA256 5051f7f492aa860535fd4500096e6af14cb55ccef82ecd7d6532b8475009463f
SHA512 f7e261573ae97c4497c272e78458067dcdaff85739391efb6f279d8a0fd6d4b66511a27300e1f16c6e42ccc98138e58f3decba8dd713327f974158f4e3a24446

memory/2636-20-0x0000000002E60000-0x0000000005D4A000-memory.dmp

memory/2636-21-0x0000000002E60000-0x0000000005D4A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-19 17:33

Reported

2024-11-19 17:35

Platform

win10v2004-20241007-en

Max time kernel

146s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

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\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A
File opened for modification C:\Windows\Fonts\Gullis.lnk C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

"C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe"

C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

"C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
NL 185.222.57.90:80 tcp
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
NL 185.222.57.90:80 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
NL 185.222.57.90:80 tcp
NL 185.222.57.90:80 tcp
US 8.8.8.8:53 180.129.81.91.in-addr.arpa udp
NL 185.222.57.90:80 tcp
NL 185.222.57.90:80 tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
NL 185.222.57.90:80 tcp
NL 185.222.57.90:80 tcp
NL 185.222.57.90:80 tcp
NL 185.222.57.90:80 tcp

Files

C:\Users\Admin\AppData\Local\Temp\nszB680.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

C:\Windows\Fonts\Gullis.lnk

MD5 6f44cef252510da2d224ceb73e73a97f
SHA1 19ced1cad25585e37185b65743a1ef9473063f3d
SHA256 a36473b51c20dcd19e2b09239b2e9065bd1d861e0859f4f9a01a0fcc087793cf
SHA512 1be4bccbcf35fe8faa04b418fb778598946083dcb89fc77b657ef2581e28145faba013623b0d8227db63abad592d4fc9ed3f19aea9b49ebaf56e9a119d285e08

memory/2144-18-0x0000000002AC0000-0x00000000059AA000-memory.dmp

memory/2144-19-0x0000000076FF1000-0x0000000077111000-memory.dmp

memory/2144-20-0x0000000002AC0000-0x00000000059AA000-memory.dmp

memory/432-21-0x0000000000400000-0x0000000001654000-memory.dmp

memory/432-22-0x0000000001660000-0x000000000454A000-memory.dmp

memory/432-23-0x0000000001660000-0x000000000454A000-memory.dmp

memory/432-24-0x0000000000400000-0x0000000001654000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-19 17:33

Reported

2024-11-19 17:35

Platform

win7-20240903-en

Max time kernel

118s

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 2316 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-19 17:33

Reported

2024-11-19 17:35

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

146s

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 2356 wrote to memory of 4672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2356 wrote to memory of 4672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2356 wrote to memory of 4672 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 4672 -ip 4672

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp

Files

N/A