Malware Analysis Report

2025-08-05 14:07

Sample ID 230805-qtcgracg84
Target 7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe
SHA256 7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362
Tags
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 Overview

score
10/10

SHA256

7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362

Threat Level: Known bad

The file 7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe was found to be: Known bad.

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Checks QEMU agent file

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Enumerates physical storage devices

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-05 13:32

Signatures

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

2023-08-05 13:32

Reported

2023-08-05 13:35

Platform

win7-20230712-en

Max time kernel

149s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.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\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"

Network

Country Destination Domain Proto
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp

Files

\Users\Admin\AppData\Local\Temp\nsy8547.tmp\System.dll

MD5 3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 fe582246792774c2c9dd15639ffa0aca90d6fd0b
SHA256 fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
SHA512 0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

memory/2804-61-0x00000000039F0000-0x0000000004FF4000-memory.dmp

memory/2804-62-0x00000000039F0000-0x0000000004FF4000-memory.dmp

memory/2804-63-0x0000000077900000-0x0000000077AA9000-memory.dmp

memory/2804-64-0x0000000077AF0000-0x0000000077BC6000-memory.dmp

memory/2804-65-0x0000000010000000-0x0000000010006000-memory.dmp

memory/1832-66-0x0000000000E40000-0x0000000002444000-memory.dmp

memory/1832-67-0x0000000077900000-0x0000000077AA9000-memory.dmp

memory/1832-68-0x0000000000E40000-0x0000000002444000-memory.dmp

memory/1832-69-0x0000000077900000-0x0000000077AA9000-memory.dmp

memory/1832-70-0x0000000000400000-0x0000000000615000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-05 13:32

Reported

2023-08-05 13:35

Platform

win10v2004-20230703-en

Max time kernel

147s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.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\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2220 wrote to memory of 1568 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 1568 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 1568 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
PID 2220 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe

Processes

C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe

"C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 8.8.8.8:53 2.77.109.52.in-addr.arpa udp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 8.8.8.8:53 27.73.42.20.in-addr.arpa udp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp
US 23.95.60.83:80 tcp

Files

C:\Users\Admin\AppData\Local\Temp\nsuAB83.tmp\System.dll

MD5 3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 fe582246792774c2c9dd15639ffa0aca90d6fd0b
SHA256 fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
SHA512 0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

memory/2220-140-0x0000000004A30000-0x0000000006034000-memory.dmp

memory/2220-141-0x0000000004A30000-0x0000000006034000-memory.dmp

memory/2220-142-0x0000000077581000-0x00000000776A1000-memory.dmp

memory/2220-143-0x0000000077581000-0x00000000776A1000-memory.dmp

memory/2220-144-0x0000000010000000-0x0000000010006000-memory.dmp

memory/3848-145-0x0000000000B70000-0x0000000002174000-memory.dmp

memory/3848-146-0x0000000000B70000-0x0000000002174000-memory.dmp

memory/3848-147-0x0000000077608000-0x0000000077609000-memory.dmp

memory/3848-148-0x0000000077581000-0x00000000776A1000-memory.dmp

memory/3848-149-0x0000000000400000-0x000000000062B000-memory.dmp