Malware Analysis Report

2024-11-13 18:57

Sample ID 240220-v8eymscd6v
Target 268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab
SHA256 268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab
Tags
smokeloader pub3 backdoor trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab

Threat Level: Known bad

The file 268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab was found to be: Known bad.

Malicious Activity Summary

smokeloader pub3 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Checks SCSI registry key(s)

Suspicious behavior: MapViewOfSection

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-20 17:39

Signatures

Unsigned PE

Description Indicator Process Target
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Analysis: behavioral2

Detonation Overview

Submitted

2024-02-20 17:39

Reported

2024-02-20 17:41

Platform

win10v2004-20240220-en

Max time kernel

151s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.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\abjdbbu N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\abjdbbu N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\abjdbbu N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\abjdbbu N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\abjdbbu N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe

"C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe"

C:\Users\Admin\AppData\Roaming\abjdbbu

C:\Users\Admin\AppData\Roaming\abjdbbu

Network

Country Destination Domain Proto
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 sjyey.com udp
KR 183.100.39.16:80 sjyey.com tcp
US 8.8.8.8:53 16.39.100.183.in-addr.arpa udp
KR 183.100.39.16:80 sjyey.com tcp
KR 183.100.39.16:80 sjyey.com tcp
KR 183.100.39.16:80 sjyey.com tcp
KR 183.100.39.16:80 sjyey.com tcp
KR 183.100.39.16:80 sjyey.com tcp
KR 183.100.39.16:80 sjyey.com tcp
US 8.8.8.8:53 206.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 7.173.189.20.in-addr.arpa udp

Files

memory/2968-1-0x0000000000A60000-0x0000000000B60000-memory.dmp

memory/2968-2-0x00000000009C0000-0x00000000009CB000-memory.dmp

memory/2968-3-0x0000000000400000-0x0000000000817000-memory.dmp

memory/3504-4-0x00000000027D0000-0x00000000027E6000-memory.dmp

memory/2968-5-0x0000000000400000-0x0000000000817000-memory.dmp

memory/2968-8-0x00000000009C0000-0x00000000009CB000-memory.dmp

C:\Users\Admin\AppData\Roaming\abjdbbu

MD5 5172685c2a54b119783e66b607ce16ae
SHA1 21d4f2576999da791d1c3838635e9fc85b144f30
SHA256 268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab
SHA512 33c10fe1cac30fc696184f896676ac8f108c06fbacecb0fd7bb2336724f131f2e783eb669d6f081fa9b537ec68c4067f84558a860e1fea97a98eaba6bbd9f535

memory/928-15-0x0000000000B00000-0x0000000000C00000-memory.dmp

memory/928-16-0x0000000000400000-0x0000000000817000-memory.dmp

memory/3504-17-0x00000000008D0000-0x00000000008E6000-memory.dmp

memory/928-20-0x0000000000400000-0x0000000000817000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-20 17:39

Reported

2024-02-20 17:41

Platform

win7-20231215-en

Max time kernel

150s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.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\fbgfjev N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\fbgfjev N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\fbgfjev N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\fbgfjev N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\fbgfjev N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2996 wrote to memory of 2928 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\fbgfjev
PID 2996 wrote to memory of 2928 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\fbgfjev
PID 2996 wrote to memory of 2928 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\fbgfjev
PID 2996 wrote to memory of 2928 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\fbgfjev

Processes

C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe

"C:\Users\Admin\AppData\Local\Temp\268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {00FBD4E8-F16E-4B9E-B59D-3256D823FA1F} S-1-5-21-928733405-3780110381-2966456290-1000:VTILVGXH\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\fbgfjev

C:\Users\Admin\AppData\Roaming\fbgfjev

Network

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

Files

memory/2500-1-0x0000000000980000-0x0000000000A80000-memory.dmp

memory/2500-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/2500-3-0x0000000000400000-0x0000000000817000-memory.dmp

memory/2500-5-0x0000000000400000-0x0000000000817000-memory.dmp

memory/1232-4-0x0000000002AA0000-0x0000000002AB6000-memory.dmp

C:\Users\Admin\AppData\Roaming\fbgfjev

MD5 5172685c2a54b119783e66b607ce16ae
SHA1 21d4f2576999da791d1c3838635e9fc85b144f30
SHA256 268bb534e403c39232c77c9eda53a7dd703153784b6a3d0e6e29a48f514b5dab
SHA512 33c10fe1cac30fc696184f896676ac8f108c06fbacecb0fd7bb2336724f131f2e783eb669d6f081fa9b537ec68c4067f84558a860e1fea97a98eaba6bbd9f535

memory/2928-14-0x00000000008C0000-0x00000000009C0000-memory.dmp

memory/2928-15-0x0000000000400000-0x0000000000817000-memory.dmp

memory/1232-16-0x0000000003E00000-0x0000000003E16000-memory.dmp

memory/2928-19-0x0000000000400000-0x0000000000817000-memory.dmp