Malware Analysis Report

2025-08-10 19:27

Sample ID 230713-e97gaagd2s
Target tmp
SHA256 92016b01f6a319dece11785543f6ec734a436ba63727a8ae065890dfd4b6420d
Tags
guloader smokeloader backdoor downloader trojan
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

92016b01f6a319dece11785543f6ec734a436ba63727a8ae065890dfd4b6420d

Threat Level: Known bad

The file tmp was found to be: Known bad.

Malicious Activity Summary

guloader smokeloader backdoor downloader trojan

Guloader,Cloudeye

SmokeLoader

Checks QEMU agent file

Loads dropped DLL

Deletes itself

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in System32 directory

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Checks SCSI registry key(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-07-13 04:39

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-07-13 04:39

Reported

2023-07-13 04:42

Platform

win7-20230712-en

Max time kernel

150s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\tmp.exe"

Signatures

Guloader,Cloudeye

downloader guloader

SmokeLoader

trojan backdoor smokeloader

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\tmp.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Deletes itself

Description Indicator Process Target
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Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Orbiculares.ini C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2596 set thread context of 2096 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Users\Admin\AppData\Local\Temp\tmp.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\sundhedsmyndighederne.Vac C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Enumerates physical storage devices

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A
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Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A N/A N/A

Suspicious behavior: MapViewOfSection

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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\tmp.exe

"C:\Users\Admin\AppData\Local\Temp\tmp.exe"

C:\Users\Admin\AppData\Local\Temp\tmp.exe

"C:\Users\Admin\AppData\Local\Temp\tmp.exe"

Network

Country Destination Domain Proto
US 198.23.156.248:80 198.23.156.248 tcp
US 8.8.8.8:53 cletonmy.com udp
CA 172.105.103.207:80 cletonmy.com tcp
US 8.8.8.8:53 alpatrik.com udp
RU 193.106.175.162:80 alpatrik.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsj8538.tmp\System.dll

MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

C:\Users\Admin\AppData\Local\Temp\nsj8538.tmp\System.dll

MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

\Users\Admin\AppData\Local\Temp\nsj8538.tmp\System.dll

MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

memory/2596-66-0x0000000002870000-0x0000000004BC3000-memory.dmp

memory/2596-68-0x0000000002870000-0x0000000004BC3000-memory.dmp

memory/2096-67-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2096-69-0x0000000001470000-0x00000000037C3000-memory.dmp

memory/2096-70-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2096-71-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2096-72-0x0000000001470000-0x00000000037C3000-memory.dmp

memory/2096-73-0x0000000001470000-0x00000000037C3000-memory.dmp

memory/1256-74-0x00000000021B0000-0x00000000021C6000-memory.dmp

memory/2096-75-0x0000000001470000-0x00000000037C3000-memory.dmp

memory/2096-78-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-07-13 04:39

Reported

2023-07-13 04:42

Platform

win10v2004-20230703-en

Max time kernel

150s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\tmp.exe"

Signatures

Guloader,Cloudeye

downloader guloader

SmokeLoader

trojan backdoor smokeloader

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\tmp.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Orbiculares.ini C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1724 set thread context of 4288 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Users\Admin\AppData\Local\Temp\tmp.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\sundhedsmyndighederne.Vac C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Enumerates physical storage devices

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe N/A
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Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
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Suspicious behavior: MapViewOfSection

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\tmp.exe

"C:\Users\Admin\AppData\Local\Temp\tmp.exe"

C:\Users\Admin\AppData\Local\Temp\tmp.exe

"C:\Users\Admin\AppData\Local\Temp\tmp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 76.121.18.2.in-addr.arpa udp
US 198.23.156.248:80 198.23.156.248 tcp
US 8.8.8.8:53 248.156.23.198.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 cletonmy.com udp
CA 172.105.103.207:80 cletonmy.com tcp
US 8.8.8.8:53 alpatrik.com udp
RU 193.106.175.162:80 alpatrik.com tcp
US 8.8.8.8:53 162.175.106.193.in-addr.arpa udp
US 8.8.8.8:53 89.65.42.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsz6C28.tmp\System.dll

MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

C:\Users\Admin\AppData\Local\Temp\nsz6C28.tmp\System.dll

MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

C:\Users\Admin\AppData\Local\Temp\nsz6C28.tmp\System.dll

MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

memory/1724-143-0x0000000002A90000-0x0000000004DE3000-memory.dmp

memory/1724-144-0x0000000002A90000-0x0000000004DE3000-memory.dmp

memory/4288-145-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4288-146-0x0000000001660000-0x00000000039B3000-memory.dmp

memory/4288-147-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4288-148-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4288-149-0x0000000001660000-0x00000000039B3000-memory.dmp

memory/4288-150-0x0000000001660000-0x00000000039B3000-memory.dmp

memory/760-151-0x00000000028A0000-0x00000000028B6000-memory.dmp

memory/4288-153-0x0000000001660000-0x00000000039B3000-memory.dmp

memory/4288-155-0x0000000000400000-0x0000000001654000-memory.dmp

memory/760-159-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-160-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-161-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-162-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-163-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-164-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-165-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-166-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-167-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-168-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-169-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-170-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-171-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-172-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-173-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-174-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

memory/760-175-0x0000000000A90000-0x0000000000AA0000-memory.dmp

memory/760-176-0x0000000000AC0000-0x0000000000ACA000-memory.dmp

memory/760-177-0x0000000000AC0000-0x0000000000ACA000-memory.dmp