Malware Analysis Report

2025-08-10 19:27

Sample ID 230713-v288xahf49
Target bill payment notice #43782 PDF.exe
SHA256 e712635bcf6dfae53c0b3679f053bd3a4e509e26295c0d3991887abc3e37f5b8
Tags
guloader discovery downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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 Overview

score
10/10

SHA256

e712635bcf6dfae53c0b3679f053bd3a4e509e26295c0d3991887abc3e37f5b8

Threat Level: Known bad

The file bill payment notice #43782 PDF.exe was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader

Guloader,Cloudeye

Loads dropped DLL

Checks QEMU agent file

Checks installed software on the system

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Drops file in Program Files directory

Drops file in Windows directory

Enumerates physical storage devices

Program crash

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-07-13 17:30

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-07-13 17:30

Reported

2023-07-13 17:32

Platform

win7-20230712-en

Max time kernel

141s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Checks QEMU agent file

Description Indicator Process Target
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Checks installed software on the system

discovery

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2496 set thread context of 2860 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Muhamedanere\Falden\Pachylosis.ini C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Amintor\Idioreflex\Syrnende\Rosentrsskrinets.Adl248 C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2496 wrote to memory of 2860 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe
PID 2496 wrote to memory of 2860 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe
PID 2496 wrote to memory of 2860 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe
PID 2496 wrote to memory of 2860 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe
PID 2496 wrote to memory of 2860 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe
PID 2860 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Windows\SysWOW64\WerFault.exe
PID 2860 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Windows\SysWOW64\WerFault.exe
PID 2860 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Windows\SysWOW64\WerFault.exe
PID 2860 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe"

C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2860 -s 488

Network

Country Destination Domain Proto
GB 5.253.114.108:80 5.253.114.108 tcp

Files

\Users\Admin\AppData\Local\Temp\nsy7659.tmp\System.dll

MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

C:\Users\Admin\AppData\Local\Temp\nsy7659.tmp\System.dll

MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

\Users\Admin\AppData\Local\Temp\nsy7659.tmp\System.dll

MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

memory/2496-69-0x0000000006730000-0x0000000007657000-memory.dmp

memory/2496-70-0x0000000006730000-0x0000000007657000-memory.dmp

memory/2496-71-0x00000000773D0000-0x0000000077579000-memory.dmp

memory/2496-72-0x00000000775C0000-0x0000000077696000-memory.dmp

memory/2496-73-0x0000000010000000-0x0000000010006000-memory.dmp

memory/2860-74-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-75-0x0000000001470000-0x0000000002397000-memory.dmp

memory/2860-76-0x00000000773D0000-0x0000000077579000-memory.dmp

memory/2860-77-0x0000000001470000-0x0000000002397000-memory.dmp

memory/2860-78-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-80-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-82-0x0000000001470000-0x0000000002397000-memory.dmp

memory/2860-83-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-07-13 17:30

Reported

2023-07-13 17:32

Platform

win10v2004-20230703-en

Max time kernel

148s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe"

Signatures

Checks installed software on the system

discovery

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Muhamedanere\Falden\Pachylosis.ini C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Amintor\Idioreflex\Syrnende\Rosentrsskrinets.Adl248 C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe

"C:\Users\Admin\AppData\Local\Temp\bill payment notice #43782 PDF.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 113.208.253.8.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 64.13.109.52.in-addr.arpa udp
US 8.8.8.8:53 69.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 7.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsq2017.tmp\System.dll

MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

C:\Users\Admin\AppData\Local\Temp\nsq2017.tmp\System.dll

MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

C:\Users\Admin\AppData\Local\Temp\nsq2017.tmp\System.dll

MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

memory/2332-149-0x00000000079D0000-0x00000000088F7000-memory.dmp

memory/2332-150-0x00000000079D0000-0x00000000088F7000-memory.dmp