Malware Analysis Report

2025-01-02 11:12

Sample ID 240307-w969ysbf2x
Target 2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9
SHA256 2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9
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

2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9

Threat Level: Known bad

The file 2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Suspicious use of UnmapMainImage

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-07 18:38

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-07 18:38

Reported

2024-03-07 18:40

Platform

win7-20240221-en

Max time kernel

150s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.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\wwvjcuv N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\wwvjcuv N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\wwvjcuv N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\wwvjcuv N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\wwvjcuv N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2536 wrote to memory of 2876 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wwvjcuv
PID 2536 wrote to memory of 2876 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wwvjcuv
PID 2536 wrote to memory of 2876 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wwvjcuv
PID 2536 wrote to memory of 2876 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\wwvjcuv

Processes

C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe

"C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {2DE0CAA3-873E-4E5B-94E0-2B022EA1D50D} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\wwvjcuv

C:\Users\Admin\AppData\Roaming\wwvjcuv

Network

Country Destination Domain Proto
US 8.8.8.8:53 kamsmad.com udp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp
KR 211.171.233.126:80 kamsmad.com tcp

Files

memory/1312-1-0x0000000002350000-0x0000000002450000-memory.dmp

memory/1312-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/1312-3-0x0000000000400000-0x0000000001F06000-memory.dmp

memory/1312-5-0x0000000000400000-0x0000000001F06000-memory.dmp

memory/1212-4-0x0000000003E40000-0x0000000003E56000-memory.dmp

C:\Users\Admin\AppData\Roaming\wwvjcuv

MD5 4c8da92ecf868d4042cc5252d659925a
SHA1 589db861e7216d9dad95c217cd09375066229da9
SHA256 2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9
SHA512 e9640761edff7ae479fc922f8dfa141daebc69244870ae5ef322c839e1fb5a893cc6d5c5ccdd189c4f2a34227e636d9c53658f740a48ff88f0794a0919b080ef

memory/2876-14-0x00000000002B0000-0x00000000003B0000-memory.dmp

memory/2876-15-0x0000000000400000-0x0000000001F06000-memory.dmp

memory/1212-16-0x0000000002DC0000-0x0000000002DD6000-memory.dmp

memory/2876-17-0x0000000000400000-0x0000000001F06000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-07 18:38

Reported

2024-03-07 18:40

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.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\sjsgwiv N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\sjsgwiv N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\sjsgwiv N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\sjsgwiv N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\sjsgwiv N/A

Suspicious use of UnmapMainImage

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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe

"C:\Users\Admin\AppData\Local\Temp\2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9.exe"

C:\Users\Admin\AppData\Roaming\sjsgwiv

C:\Users\Admin\AppData\Roaming\sjsgwiv

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 195.233.44.23.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 kamsmad.com udp
AR 186.182.55.44:80 kamsmad.com tcp
US 8.8.8.8:53 44.55.182.186.in-addr.arpa udp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 197.178.17.96.in-addr.arpa udp
AR 186.182.55.44:80 kamsmad.com tcp
US 8.8.8.8:53 218.135.221.88.in-addr.arpa udp
AR 186.182.55.44:80 kamsmad.com tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
AR 186.182.55.44:80 kamsmad.com tcp
US 8.8.8.8:53 179.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 33.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 168.117.168.52.in-addr.arpa udp

Files

memory/2264-1-0x0000000002070000-0x0000000002170000-memory.dmp

memory/2264-2-0x0000000003C50000-0x0000000003C5B000-memory.dmp

memory/2264-3-0x0000000000400000-0x0000000001F06000-memory.dmp

memory/3356-4-0x0000000002810000-0x0000000002826000-memory.dmp

memory/2264-5-0x0000000000400000-0x0000000001F06000-memory.dmp

C:\Users\Admin\AppData\Roaming\sjsgwiv

MD5 4c8da92ecf868d4042cc5252d659925a
SHA1 589db861e7216d9dad95c217cd09375066229da9
SHA256 2c23e348735e23bfa0c31760dadae7045a43fb5997e5b93e8bb155663e4652f9
SHA512 e9640761edff7ae479fc922f8dfa141daebc69244870ae5ef322c839e1fb5a893cc6d5c5ccdd189c4f2a34227e636d9c53658f740a48ff88f0794a0919b080ef

memory/4268-14-0x0000000002250000-0x0000000002350000-memory.dmp

memory/4268-15-0x0000000000400000-0x0000000001F06000-memory.dmp

memory/3356-16-0x0000000002790000-0x00000000027A6000-memory.dmp

memory/4268-17-0x0000000000400000-0x0000000001F06000-memory.dmp