Malware Analysis Report

2025-08-05 12:27

Sample ID 230923-aylyzsba9v
Target a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078
SHA256 a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078
Tags
smokeloader pub1 backdoor trojan
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

a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078

Threat Level: Known bad

The file a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Suspicious behavior: MapViewOfSection

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 00:37

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 00:37

Reported

2023-09-23 00:43

Platform

win7-20230831-en

Max time kernel

318s

Max time network

321s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\wcahhgd N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\wcahhgd N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\wcahhgd N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\wcahhgd N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

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\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\wcahhgd N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2280 wrote to memory of 2712 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wcahhgd
PID 2280 wrote to memory of 2712 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wcahhgd
PID 2280 wrote to memory of 2712 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wcahhgd
PID 2280 wrote to memory of 2712 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wcahhgd

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe

"C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {0BCF8B0D-90A8-4F13-943D-19D31C8F9F15} S-1-5-21-3750544865-3773649541-1858556521-1000:XOCYHKRS\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\wcahhgd

C:\Users\Admin\AppData\Roaming\wcahhgd

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp
AR 190.224.203.37:80 gudintas.at tcp

Files

memory/2248-0-0x0000000000230000-0x0000000000245000-memory.dmp

memory/2248-1-0x0000000000250000-0x0000000000259000-memory.dmp

memory/2248-2-0x0000000000400000-0x000000000043C000-memory.dmp

memory/2248-5-0x0000000000250000-0x0000000000259000-memory.dmp

memory/2248-4-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1264-3-0x0000000002A40000-0x0000000002A56000-memory.dmp

memory/2248-8-0x0000000000230000-0x0000000000245000-memory.dmp

C:\Users\Admin\AppData\Roaming\wcahhgd

MD5 5e24e3e53137efe701b18e01b83cde73
SHA1 c2561797a85b99d192a09c479f6dabd88baaaae4
SHA256 a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078
SHA512 e96e8d998b97e6520041f0502da2d2e14e398a0e7dfa41515d30f3d5f12a92c84e7d5f608d9d82f830cf7347cb9e44244ead88fb0338428e60e24f8199b9f701

C:\Users\Admin\AppData\Roaming\wcahhgd

MD5 5e24e3e53137efe701b18e01b83cde73
SHA1 c2561797a85b99d192a09c479f6dabd88baaaae4
SHA256 a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078
SHA512 e96e8d998b97e6520041f0502da2d2e14e398a0e7dfa41515d30f3d5f12a92c84e7d5f608d9d82f830cf7347cb9e44244ead88fb0338428e60e24f8199b9f701

memory/2712-14-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1264-15-0x0000000002C40000-0x0000000002C56000-memory.dmp

memory/2712-18-0x0000000000400000-0x000000000043C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-23 00:37

Reported

2023-09-23 00:42

Platform

win10-20230915-en

Max time kernel

300s

Max time network

282s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\rurbccw N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rurbccw N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rurbccw N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rurbccw N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

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\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\rurbccw 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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe

"C:\Users\Admin\AppData\Local\Temp\a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078.exe"

C:\Users\Admin\AppData\Roaming\rurbccw

C:\Users\Admin\AppData\Roaming\rurbccw

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
US 8.8.8.8:53 79.216.224.84.in-addr.arpa udp
AR 186.13.17.220:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
US 8.8.8.8:53 220.17.13.186.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
AR 186.13.17.220:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
US 8.8.8.8:53 226.162.46.104.in-addr.arpa udp
AR 186.13.17.220:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp

Files

memory/1512-0-0x0000000001F00000-0x0000000001F15000-memory.dmp

memory/1512-1-0x00000000001F0000-0x00000000001F9000-memory.dmp

memory/1512-2-0x0000000000400000-0x000000000043C000-memory.dmp

memory/3300-3-0x0000000000E70000-0x0000000000E86000-memory.dmp

memory/1512-4-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1512-7-0x00000000001F0000-0x00000000001F9000-memory.dmp

memory/1512-8-0x0000000001F00000-0x0000000001F15000-memory.dmp

C:\Users\Admin\AppData\Roaming\rurbccw

MD5 5e24e3e53137efe701b18e01b83cde73
SHA1 c2561797a85b99d192a09c479f6dabd88baaaae4
SHA256 a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078
SHA512 e96e8d998b97e6520041f0502da2d2e14e398a0e7dfa41515d30f3d5f12a92c84e7d5f608d9d82f830cf7347cb9e44244ead88fb0338428e60e24f8199b9f701

C:\Users\Admin\AppData\Roaming\rurbccw

MD5 5e24e3e53137efe701b18e01b83cde73
SHA1 c2561797a85b99d192a09c479f6dabd88baaaae4
SHA256 a5a107e890080f3642ebe97a41abdecab2113fe981569361e9ebb4f96ab5d078
SHA512 e96e8d998b97e6520041f0502da2d2e14e398a0e7dfa41515d30f3d5f12a92c84e7d5f608d9d82f830cf7347cb9e44244ead88fb0338428e60e24f8199b9f701

memory/2824-14-0x0000000000400000-0x000000000043C000-memory.dmp

memory/3300-15-0x0000000002CA0000-0x0000000002CB6000-memory.dmp

memory/2824-18-0x0000000000400000-0x000000000043C000-memory.dmp