Malware Analysis Report

2024-11-13 18:57

Sample ID 240219-wzas1aad3z
Target 614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f
SHA256 614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f
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: 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

614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f

Threat Level: Known bad

The file 614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f was found to be: Known bad.

Malicious Activity Summary

smokeloader pub3 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-19 18:21

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-19 18:21

Reported

2024-02-19 19:21

Platform

win7-20231215-en

Max time kernel

153s

Max time network

129s

Command Line

"C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.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\ugrjcgf 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\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ugrjcgf N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ugrjcgf N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ugrjcgf N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\ugrjcgf N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 476 wrote to memory of 636 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ugrjcgf
PID 476 wrote to memory of 636 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ugrjcgf
PID 476 wrote to memory of 636 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ugrjcgf
PID 476 wrote to memory of 636 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ugrjcgf

Processes

C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe

"C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {79A3EBFB-FFFE-4A39-B5C9-026EFA071BAE} S-1-5-21-3308111660-3636268597-2291490419-1000:JUBFGPHD\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\ugrjcgf

C:\Users\Admin\AppData\Roaming\ugrjcgf

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com 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
KR 183.100.39.16:80 sjyey.com tcp

Files

memory/2432-1-0x0000000000230000-0x0000000000330000-memory.dmp

memory/2432-2-0x00000000003A0000-0x00000000003AB000-memory.dmp

memory/2432-3-0x0000000000400000-0x000000000044A000-memory.dmp

memory/1220-4-0x0000000002970000-0x0000000002986000-memory.dmp

memory/2432-5-0x0000000000400000-0x000000000044A000-memory.dmp

C:\Users\Admin\AppData\Roaming\ugrjcgf

MD5 4d98ac6bd46f0fbe35210e167e68f7f9
SHA1 3c4781b5178fde4e00043ec8dc3d60e16a3bfcba
SHA256 614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f
SHA512 1e7fd390611631abd88a13652d0105f00dea67c42ec21f16e7e2974a65c0321736db6297c2c0beb3efa2597816bc8a02725c30aac56a9ad73761c95805c50512

memory/636-14-0x0000000000290000-0x0000000000390000-memory.dmp

memory/636-15-0x0000000000400000-0x000000000044A000-memory.dmp

memory/1220-16-0x0000000002BF0000-0x0000000002C06000-memory.dmp

memory/636-17-0x0000000000400000-0x000000000044A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-19 18:21

Reported

2024-02-19 19:23

Platform

win10v2004-20231215-en

Max time kernel

163s

Max time network

170s

Command Line

"C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

Description Indicator Process Target
N/A N/A N/A 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\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe

"C:\Users\Admin\AppData\Local\Temp\614d3711b9a519243c954edf8810118793e3ade58ab32ec52478e94021710c0f.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 23.160.77.104.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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
US 8.8.8.8:53 sjyey.com udp
KR 211.171.233.126:80 sjyey.com tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 126.233.171.211.in-addr.arpa 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
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 16.173.189.20.in-addr.arpa udp

Files

memory/3048-2-0x0000000000530000-0x000000000053B000-memory.dmp

memory/3048-1-0x0000000000540000-0x0000000000640000-memory.dmp

memory/3048-3-0x0000000000400000-0x000000000044A000-memory.dmp

memory/3048-4-0x0000000000400000-0x000000000044A000-memory.dmp

memory/3512-5-0x0000000000620000-0x0000000000636000-memory.dmp

memory/3048-6-0x0000000000400000-0x000000000044A000-memory.dmp

memory/3048-9-0x0000000000530000-0x000000000053B000-memory.dmp