Malware Analysis Report

2024-11-13 18:57

Sample ID 240221-fl8j4scc95
Target 92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d
SHA256 92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d
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

92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d

Threat Level: Known bad

The file 92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d 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 use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-21 04:58

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-21 04:58

Reported

2024-02-21 05:03

Platform

win7-20231215-en

Max time kernel

300s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.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\dftecgt 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\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\dftecgt N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\dftecgt N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\dftecgt N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\dftecgt 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 1580 wrote to memory of 2904 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\dftecgt
PID 1580 wrote to memory of 2904 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\dftecgt
PID 1580 wrote to memory of 2904 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\dftecgt
PID 1580 wrote to memory of 2904 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\dftecgt

Processes

C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe

"C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {3FD893B9-8A7F-4C57-8355-E3B7805E5C98} S-1-5-21-1603059206-2004189698-4139800220-1000:AILVMYUM\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\dftecgt

C:\Users\Admin\AppData\Roaming\dftecgt

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
BA 109.175.29.39:80 sjyey.com tcp
BA 109.175.29.39:80 sjyey.com tcp
BA 109.175.29.39:80 sjyey.com tcp
BA 109.175.29.39:80 sjyey.com tcp
BA 109.175.29.39:80 sjyey.com tcp
BA 109.175.29.39:80 sjyey.com tcp
BA 109.175.29.39:80 sjyey.com tcp

Files

memory/624-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

memory/624-2-0x00000000001C0000-0x00000000001CB000-memory.dmp

memory/624-3-0x0000000000400000-0x0000000000818000-memory.dmp

memory/624-5-0x0000000000400000-0x0000000000818000-memory.dmp

memory/1380-4-0x0000000002560000-0x0000000002576000-memory.dmp

C:\Users\Admin\AppData\Roaming\dftecgt

MD5 fcb0fb8bba03aa7272d74cf4fa222889
SHA1 15ebe4683e9dca78d430a0b3e0ea2e824d947d70
SHA256 92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d
SHA512 0bebaa1ffad0fa62b99e3aea8e853d3fbe8c02af15661524db2bb2df0639343ae7d124e2464f098f0472cd1a65ee3bb0b54703b34703b17453c59550300fcfca

memory/2904-14-0x0000000000950000-0x0000000000A50000-memory.dmp

memory/2904-15-0x0000000000400000-0x0000000000818000-memory.dmp

memory/1380-16-0x0000000003B30000-0x0000000003B46000-memory.dmp

memory/2904-19-0x0000000000400000-0x0000000000818000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-21 04:58

Reported

2024-02-21 05:03

Platform

win10-20240214-en

Max time kernel

300s

Max time network

298s

Command Line

"C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.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\rggiwcf N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rggiwcf N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rggiwcf N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rggiwcf N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\rggiwcf 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\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe

"C:\Users\Admin\AppData\Local\Temp\92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d.exe"

C:\Users\Admin\AppData\Roaming\rggiwcf

C:\Users\Admin\AppData\Roaming\rggiwcf

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 211.53.230.67:80 sjyey.com tcp
KR 211.53.230.67:80 sjyey.com tcp
US 8.8.8.8:53 67.230.53.211.in-addr.arpa udp
KR 211.53.230.67:80 sjyey.com tcp
KR 211.53.230.67:80 sjyey.com tcp
KR 211.53.230.67:80 sjyey.com tcp
KR 211.53.230.67:80 sjyey.com tcp
KR 211.53.230.67:80 sjyey.com tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 91.16.208.104.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

memory/2360-1-0x0000000000990000-0x0000000000A90000-memory.dmp

memory/2360-3-0x0000000000400000-0x0000000000818000-memory.dmp

memory/2360-2-0x0000000000880000-0x000000000088B000-memory.dmp

memory/3496-4-0x0000000001070000-0x0000000001086000-memory.dmp

memory/2360-5-0x0000000000400000-0x0000000000818000-memory.dmp

C:\Users\Admin\AppData\Roaming\rggiwcf

MD5 fcb0fb8bba03aa7272d74cf4fa222889
SHA1 15ebe4683e9dca78d430a0b3e0ea2e824d947d70
SHA256 92b95597a7dde38ab3c182a7df8f27b8193370755b3f453a71b50fa670afcf8d
SHA512 0bebaa1ffad0fa62b99e3aea8e853d3fbe8c02af15661524db2bb2df0639343ae7d124e2464f098f0472cd1a65ee3bb0b54703b34703b17453c59550300fcfca

memory/4884-14-0x0000000000A10000-0x0000000000B10000-memory.dmp

memory/4884-15-0x0000000000400000-0x0000000000818000-memory.dmp

memory/3496-16-0x0000000002E60000-0x0000000002E76000-memory.dmp

memory/4884-17-0x0000000000400000-0x0000000000818000-memory.dmp