Malware Analysis Report

2025-08-05 12:28

Sample ID 230923-xtyhjshh6x
Target a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe
SHA256 a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1
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

a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1

Threat Level: Known bad

The file a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of FindShellTrayWindow

Suspicious behavior: MapViewOfSection

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 19:09

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 19:09

Reported

2023-09-23 19:12

Platform

win7-20230831-en

Max time kernel

154s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

Description Indicator Process Target
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Executes dropped EXE

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

Checks SCSI registry key(s)

Description Indicator Process Target
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\eugfcir N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\eugfcir N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\eugfcir N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.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\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\eugfcir N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
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Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A N/A N/A
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Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2416 wrote to memory of 3036 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eugfcir
PID 2416 wrote to memory of 3036 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eugfcir
PID 2416 wrote to memory of 3036 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eugfcir
PID 2416 wrote to memory of 3036 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eugfcir

Processes

C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe

"C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {73D9D5E4-F5EF-4047-834F-A85080719190} S-1-5-21-3750544865-3773649541-1858556521-1000:XOCYHKRS\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\eugfcir

C:\Users\Admin\AppData\Roaming\eugfcir

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
KR 175.119.10.231:80 gudintas.at tcp
US 8.8.8.8:53 gudintas.at udp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp
KR 115.88.24.200:80 gudintas.at tcp

Files

memory/3020-1-0x00000000007E0000-0x00000000008E0000-memory.dmp

memory/3020-2-0x0000000000400000-0x0000000000711000-memory.dmp

memory/3020-3-0x0000000000220000-0x0000000000229000-memory.dmp

memory/3020-5-0x0000000000400000-0x0000000000711000-memory.dmp

memory/1220-4-0x00000000029D0000-0x00000000029E6000-memory.dmp

C:\Users\Admin\AppData\Roaming\eugfcir

MD5 9abf90bde094785cffbe3f34094b59e0
SHA1 18e57ddb3d32d20f526cee6dd2c4731fea2f326b
SHA256 a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1
SHA512 ede2ad56ae8c63c261f4f51b72b98c257dfbccc384c9926ad6e348821d1316fe1ae1a7d85d5d1048b1b95ef845d523059a5c7f365cbb09634d283be492b7513a

C:\Users\Admin\AppData\Roaming\eugfcir

MD5 9abf90bde094785cffbe3f34094b59e0
SHA1 18e57ddb3d32d20f526cee6dd2c4731fea2f326b
SHA256 a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1
SHA512 ede2ad56ae8c63c261f4f51b72b98c257dfbccc384c9926ad6e348821d1316fe1ae1a7d85d5d1048b1b95ef845d523059a5c7f365cbb09634d283be492b7513a

memory/3036-14-0x00000000007B0000-0x00000000008B0000-memory.dmp

memory/3036-15-0x0000000000400000-0x0000000000711000-memory.dmp

memory/1220-16-0x0000000002A20000-0x0000000002A36000-memory.dmp

memory/3036-19-0x0000000000400000-0x0000000000711000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-23 19:09

Reported

2023-09-23 19:11

Platform

win10v2004-20230915-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.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\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.exe

"C:\Users\Admin\AppData\Local\Temp\a76ac34a9fc8146224d737ebb15bdbf2e35acd67e274ad328fcab5b99f8a99c1_JC.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 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 254.5.248.8.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 198.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 gudintas.at udp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
US 8.8.8.8:53 90.14.59.211.in-addr.arpa udp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
KR 211.59.14.90:80 gudintas.at tcp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
KR 211.59.14.90:80 gudintas.at tcp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
KR 211.59.14.90:80 gudintas.at tcp
US 8.8.8.8:53 8.173.189.20.in-addr.arpa udp

Files

memory/3856-1-0x0000000000AB0000-0x0000000000BB0000-memory.dmp

memory/3856-2-0x0000000000870000-0x0000000000879000-memory.dmp

memory/3856-3-0x0000000000400000-0x0000000000711000-memory.dmp

memory/3168-4-0x0000000002750000-0x0000000002766000-memory.dmp

memory/3856-7-0x0000000000870000-0x0000000000879000-memory.dmp

memory/3856-5-0x0000000000400000-0x0000000000711000-memory.dmp