Malware Analysis Report

2024-11-13 18:56

Sample ID 240220-fe4ycabc3t
Target 18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08
SHA256 18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08
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

18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08

Threat Level: Known bad

The file 18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08 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: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-20 04:48

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-20 04:48

Reported

2024-02-20 04:53

Platform

win7-20231129-en

Max time kernel

300s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.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\vffbgvg N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vffbgvg N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vffbgvg N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vffbgvg N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\vffbgvg N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
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Suspicious use of SendNotifyMessage

Description Indicator Process Target
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Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2284 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\vffbgvg
PID 2284 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\vffbgvg
PID 2284 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\vffbgvg
PID 2284 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\vffbgvg

Processes

C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe

"C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {B9B35796-19DB-4811-A033-2CF9795832E5} S-1-5-21-3470981204-343661084-3367201002-1000:GLTGRJAG\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\vffbgvg

C:\Users\Admin\AppData\Roaming\vffbgvg

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 175.119.10.231:80 sjyey.com tcp
US 8.8.8.8:53 babonwo.ru udp
RU 91.189.114.29:80 babonwo.ru tcp
US 8.8.8.8:53 mth.com.ua udp
US 8.8.8.8:53 piratia.pw udp
US 104.21.79.117:80 piratia.pw tcp
US 104.21.79.117:443 piratia.pw tcp
US 8.8.8.8:53 apps.identrust.com udp
GB 96.17.179.184:80 apps.identrust.com tcp
US 8.8.8.8:53 www.microsoft.com udp
US 104.21.79.117:443 piratia.pw tcp
US 8.8.8.8:53 go-piratia.ru udp
US 104.21.51.101:80 go-piratia.ru tcp
US 104.21.51.101:443 go-piratia.ru tcp

Files

memory/1672-1-0x00000000008B0000-0x00000000009B0000-memory.dmp

memory/1672-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/1672-3-0x0000000000400000-0x000000000044B000-memory.dmp

memory/1672-5-0x0000000000400000-0x000000000044B000-memory.dmp

memory/1256-4-0x00000000029A0000-0x00000000029B6000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

C:\Users\Admin\AppData\Local\Temp\Tar7258.tmp

MD5 9c0c641c06238516f27941aa1166d427
SHA1 64cd549fb8cf014fcd9312aa7a5b023847b6c977
SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
SHA512 936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

MD5 d2ecad1dbf383385569648b6a84184ab
SHA1 ff40f67aa8d528354230e71162ee794d6b53e859
SHA256 4667d6373af0a611f9dc1b4929f8a19b687b831835515bb2bf5524dd9df97077
SHA512 feb7c0887038f3be029a14194ba0d4fc4df6c595e3966f258c0e7d608e60000e35390bd411aec1ce25306b49086685a2512efd439b01e41f8207719617dbb8ad

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

MD5 a266bb7dcc38a562631361bbf61dd11b
SHA1 3b1efd3a66ea28b16697394703a72ca340a05bd5
SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
SHA512 0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

MD5 50dbd15badda54134f5ecacae6b54741
SHA1 9a8218619bc644ad376036cbdceb2bc432f30671
SHA256 20b950ea163ba0944d164d1f2fe0b0707ad1311a71f4e92c2e4e6cb6bd6da6f0
SHA512 877a0d5780329c2b31059cfb850348a085b820d8284f072104bb7958f78e529082b3d5c3c3bfe4960259771021041084af2c5d908f7c08c6b3cdb1ef8465d2b8

C:\Users\Admin\AppData\Roaming\vffbgvg

MD5 91279277b9cc7d43752c76dcaea5fce6
SHA1 5411e516c578887602f29e56294e841b854b8b7e
SHA256 18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08
SHA512 3f4fbd59734f694ce2079ac10769d34366ec3d376f166c406acda9dc71bfa203e1a958e96bd218c6b6c1f47c12600c4bfc137675b6b2d297eed2107c80064696

memory/2400-148-0x0000000000500000-0x0000000000600000-memory.dmp

memory/2400-149-0x0000000000400000-0x000000000044B000-memory.dmp

memory/1256-150-0x0000000002ED0000-0x0000000002EE6000-memory.dmp

memory/2400-151-0x0000000000400000-0x000000000044B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-20 04:48

Reported

2024-02-20 04:53

Platform

win10-20240214-en

Max time kernel

300s

Max time network

293s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.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\vutedaj 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\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vutedaj N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vutedaj N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vutedaj N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\vutedaj 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\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe

"C:\Users\Admin\AppData\Local\Temp\18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08.exe"

C:\Users\Admin\AppData\Roaming\vutedaj

C:\Users\Admin\AppData\Roaming\vutedaj

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
AR 186.182.55.44:80 sjyey.com tcp
AR 186.182.55.44:80 sjyey.com tcp
US 8.8.8.8:53 44.55.182.186.in-addr.arpa udp
AR 186.182.55.44:80 sjyey.com tcp
AR 186.182.55.44:80 sjyey.com tcp
AR 186.182.55.44:80 sjyey.com tcp
AR 186.182.55.44:80 sjyey.com tcp
AR 186.182.55.44:80 sjyey.com tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp

Files

memory/4984-1-0x0000000000610000-0x0000000000710000-memory.dmp

memory/4984-2-0x00000000004B0000-0x00000000004BB000-memory.dmp

memory/4984-3-0x0000000000400000-0x000000000044B000-memory.dmp

memory/3256-4-0x0000000000AF0000-0x0000000000B06000-memory.dmp

memory/4984-5-0x0000000000400000-0x000000000044B000-memory.dmp

C:\Users\Admin\AppData\Roaming\vutedaj

MD5 91279277b9cc7d43752c76dcaea5fce6
SHA1 5411e516c578887602f29e56294e841b854b8b7e
SHA256 18d4c4325fa3930646e04f03a812ccc0c3b8907297db98317bde5a77fed7ea08
SHA512 3f4fbd59734f694ce2079ac10769d34366ec3d376f166c406acda9dc71bfa203e1a958e96bd218c6b6c1f47c12600c4bfc137675b6b2d297eed2107c80064696

memory/4920-14-0x0000000000610000-0x0000000000710000-memory.dmp

memory/4920-15-0x0000000000400000-0x000000000044B000-memory.dmp

memory/3256-16-0x0000000000B80000-0x0000000000B96000-memory.dmp

memory/4920-19-0x0000000000400000-0x000000000044B000-memory.dmp