Malware Analysis Report

2024-10-23 21:45

Sample ID 240313-sdxtvsfh9x
Target c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.bin
SHA256 c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0
Tags
smokeloader 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

c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0

Threat Level: Known bad

The file c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.bin was found to be: Known bad.

Malicious Activity Summary

smokeloader backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Checks SCSI registry key(s)

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

Suspicious behavior: EnumeratesProcesses

Uses Task Scheduler COM API

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-13 15:01

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-13 15:01

Reported

2024-03-13 15:32

Platform

win7-20240221-en

Max time kernel

1802s

Max time network

1558s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.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\cijrtjd N/A
N/A N/A C:\Users\Admin\AppData\Roaming\cijrtjd N/A
N/A N/A C:\Users\Admin\AppData\Roaming\cijrtjd 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\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cijrtjd N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
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Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe

"C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {E15940E4-1739-4BF2-9218-86FAA28CD283} S-1-5-21-406356229-2805545415-1236085040-1000:IKJSPGIM\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\cijrtjd

C:\Users\Admin\AppData\Roaming\cijrtjd

C:\Windows\system32\taskeng.exe

taskeng.exe {D5CE462C-02E7-424B-BA67-50D3A8BADB35} S-1-5-21-406356229-2805545415-1236085040-1000:IKJSPGIM\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\cijrtjd

C:\Users\Admin\AppData\Roaming\cijrtjd

C:\Windows\system32\taskeng.exe

taskeng.exe {30CB8A3C-80BD-415E-8184-052BCB82C5B7} S-1-5-21-406356229-2805545415-1236085040-1000:IKJSPGIM\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\cijrtjd

C:\Users\Admin\AppData\Roaming\cijrtjd

Network

Country Destination Domain Proto
US 8.8.8.8:53 selebration17io.io udp
US 8.8.8.8:53 vacantion18ffeu.cc udp
US 8.8.8.8:53 valarioulinity1.net udp
US 8.8.8.8:53 buriatiarutuhuob.net udp
US 8.8.8.8:53 cassiosssionunu.me udp
US 8.8.8.8:53 sulugilioiu19.net udp
US 8.8.8.8:53 goodfooggooftool.net udp
US 8.8.8.8:53 selebration17io.io udp
US 8.8.8.8:53 vacantion18ffeu.cc udp
US 8.8.8.8:53 valarioulinity1.net udp
US 8.8.8.8:53 buriatiarutuhuob.net udp
US 8.8.8.8:53 cassiosssionunu.me udp
US 8.8.8.8:53 sulugilioiu19.net udp
US 8.8.8.8:53 goodfooggooftool.net udp

Files

memory/1852-1-0x0000000001AC0000-0x0000000001BC0000-memory.dmp

memory/1852-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/1852-3-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/1360-4-0x0000000002590000-0x00000000025A6000-memory.dmp

memory/1852-5-0x0000000000400000-0x0000000001A29000-memory.dmp

C:\Users\Admin\AppData\Roaming\cijrtjd

MD5 8f44c565b6605afccbab295faaf420b8
SHA1 a9fc5e1ca19b7034f846b12ee2e5890d8c64f3b3
SHA256 c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0
SHA512 cdbf40c2def3a3dc45ac006f99ebff60d936eff53d2b16236f0424285a1749e847ee1180daa0e9e256bd86e44e76cdbc2b83d5afd1e8db1edb699d0b95900206

memory/2416-14-0x0000000000230000-0x0000000000330000-memory.dmp

memory/2416-15-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/1360-16-0x00000000025C0000-0x00000000025D6000-memory.dmp

memory/2416-17-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/1040-23-0x0000000001BF0000-0x0000000001CF0000-memory.dmp

memory/1040-24-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/1360-25-0x0000000002A30000-0x0000000002A46000-memory.dmp

memory/1040-28-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/680-32-0x00000000002D0000-0x00000000003D0000-memory.dmp

memory/680-33-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/1360-34-0x0000000002A60000-0x0000000002A76000-memory.dmp

memory/680-37-0x0000000000400000-0x0000000001A29000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-13 15:01

Reported

2024-03-13 15:32

Platform

win10v2004-20240226-en

Max time kernel

1800s

Max time network

1572s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.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\arwdhsh N/A
N/A N/A C:\Users\Admin\AppData\Roaming\arwdhsh N/A
N/A N/A C:\Users\Admin\AppData\Roaming\arwdhsh N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\arwdhsh N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ N/A N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ N/A N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe N/A
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Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
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Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe

"C:\Users\Admin\AppData\Local\Temp\c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0.exe"

C:\Users\Admin\AppData\Roaming\arwdhsh

C:\Users\Admin\AppData\Roaming\arwdhsh

C:\Users\Admin\AppData\Roaming\arwdhsh

C:\Users\Admin\AppData\Roaming\arwdhsh

C:\Users\Admin\AppData\Roaming\arwdhsh

C:\Users\Admin\AppData\Roaming\arwdhsh

Network

Country Destination Domain Proto
US 8.8.8.8:53 selebration17io.io udp
US 8.8.8.8:53 vacantion18ffeu.cc udp
US 8.8.8.8:53 valarioulinity1.net udp
US 8.8.8.8:53 buriatiarutuhuob.net udp
US 8.8.8.8:53 cassiosssionunu.me udp
US 8.8.8.8:53 sulugilioiu19.net udp
US 8.8.8.8:53 goodfooggooftool.net udp
US 8.8.8.8:53 selebration17io.io udp
US 8.8.8.8:53 vacantion18ffeu.cc udp
US 8.8.8.8:53 valarioulinity1.net udp
US 8.8.8.8:53 buriatiarutuhuob.net udp
US 8.8.8.8:53 cassiosssionunu.me udp
US 8.8.8.8:53 sulugilioiu19.net udp
US 8.8.8.8:53 goodfooggooftool.net udp
US 8.8.8.8:53 selebration17io.io udp
US 8.8.8.8:53 vacantion18ffeu.cc udp
US 8.8.8.8:53 valarioulinity1.net udp
US 8.8.8.8:53 buriatiarutuhuob.net udp
US 8.8.8.8:53 cassiosssionunu.me udp
US 8.8.8.8:53 sulugilioiu19.net udp
US 8.8.8.8:53 goodfooggooftool.net udp

Files

memory/2404-1-0x0000000001A30000-0x0000000001B30000-memory.dmp

memory/2404-2-0x0000000003630000-0x000000000363B000-memory.dmp

memory/2404-3-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/3424-4-0x00000000030B0000-0x00000000030C6000-memory.dmp

memory/2404-5-0x0000000000400000-0x0000000001A29000-memory.dmp

C:\Users\Admin\AppData\Roaming\arwdhsh

MD5 8f44c565b6605afccbab295faaf420b8
SHA1 a9fc5e1ca19b7034f846b12ee2e5890d8c64f3b3
SHA256 c88933a3bcc4494def9d0feb4568c4e865d6b333ace006256816166d34104ea0
SHA512 cdbf40c2def3a3dc45ac006f99ebff60d936eff53d2b16236f0424285a1749e847ee1180daa0e9e256bd86e44e76cdbc2b83d5afd1e8db1edb699d0b95900206

memory/3720-14-0x0000000001A70000-0x0000000001B70000-memory.dmp

memory/3720-15-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/3424-16-0x0000000002F70000-0x0000000002F86000-memory.dmp

memory/3720-17-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/2164-23-0x0000000001D40000-0x0000000001E40000-memory.dmp

memory/2164-24-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/3424-25-0x0000000002FA0000-0x0000000002FB6000-memory.dmp

memory/2164-28-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/876-32-0x0000000001A40000-0x0000000001B40000-memory.dmp

memory/876-33-0x0000000000400000-0x0000000001A29000-memory.dmp

memory/3424-34-0x0000000002FD0000-0x0000000002FE6000-memory.dmp

memory/876-37-0x0000000000400000-0x0000000001A29000-memory.dmp