Malware Analysis Report

2025-05-28 17:38

Sample ID 221220-q8e67ahg43
Target a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581
SHA256 a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581
Tags
smokeloader systembc backdoor trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581

Threat Level: Known bad

The file a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581 was found to be: Known bad.

Malicious Activity Summary

smokeloader systembc backdoor trojan

Detects Smokeloader packer

SmokeLoader

SystemBC

Executes dropped EXE

Downloads MZ/PE file

Deletes itself

Drops file in Windows directory

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-12-20 13:55

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-12-20 13:55

Reported

2022-12-20 13:58

Platform

win10-20220812-en

Max time kernel

150s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe"

Signatures

Detects Smokeloader packer

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

SmokeLoader

trojan backdoor smokeloader

SystemBC

trojan systembc

Downloads MZ/PE file

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2F9.exe N/A
N/A N/A C:\ProgramData\tlrlj\wpxpdt.exe N/A

Deletes itself

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\wpxpdt.job C:\Users\Admin\AppData\Local\Temp\2F9.exe N/A
File opened for modification C:\Windows\Tasks\wpxpdt.job C:\Users\Admin\AppData\Local\Temp\2F9.exe N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe N/A
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Suspicious behavior: GetForegroundWindowSpam

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

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe 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
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3104 wrote to memory of 4464 N/A N/A C:\Users\Admin\AppData\Local\Temp\2F9.exe
PID 3104 wrote to memory of 4464 N/A N/A C:\Users\Admin\AppData\Local\Temp\2F9.exe
PID 3104 wrote to memory of 4464 N/A N/A C:\Users\Admin\AppData\Local\Temp\2F9.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe

"C:\Users\Admin\AppData\Local\Temp\a2a56847c92e2742c52820dd151144878df54d947725c737e94332857b88c581.exe"

C:\Users\Admin\AppData\Local\Temp\2F9.exe

C:\Users\Admin\AppData\Local\Temp\2F9.exe

C:\ProgramData\tlrlj\wpxpdt.exe

C:\ProgramData\tlrlj\wpxpdt.exe start

Network

Country Destination Domain Proto
N/A 168.63.250.82:80 tcp
N/A 8.8.8.8:53 dowe.at udp
N/A 91.195.240.101:80 dowe.at tcp
N/A 8.8.8.8:53 xisac.com udp
N/A 187.232.152.147:80 xisac.com tcp
N/A 222.236.49.124:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 45.141.58.129:80 tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 222.236.49.124:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 8.8.8.8:53 bitleague.live udp
N/A 198.38.91.55:443 bitleague.live tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 187.232.152.147:80 xisac.com tcp
N/A 109.205.214.18:443 tcp

Files

memory/2404-116-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-117-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-118-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-119-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-120-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-121-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-122-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-123-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-124-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-125-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-126-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-127-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-128-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-129-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-130-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-131-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-132-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-133-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-134-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-135-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-136-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-137-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-138-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-139-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-140-0x0000000000696000-0x00000000006A7000-memory.dmp

memory/2404-141-0x00000000005D0000-0x00000000005D9000-memory.dmp

memory/2404-142-0x0000000000400000-0x000000000045F000-memory.dmp

memory/2404-143-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-144-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-145-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-146-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-147-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-148-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-149-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-150-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-151-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/2404-152-0x0000000000696000-0x00000000006A7000-memory.dmp

memory/2404-153-0x0000000000400000-0x000000000045F000-memory.dmp

memory/4464-154-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\2F9.exe

MD5 cdc67700f25eaed1417264c4bdec03d3
SHA1 56639e9414e6ee8394d940d62778475ddf071290
SHA256 fdd4cca0516be799c954e96be26b2d04e42ea0bac1edb00604412914bae2f100
SHA512 a2b38a1d4d0cb57532f3feb2efa1fb345c03df9114dfb2dcc93286e19b96eb5e182bd79d070a0e4fccf1980f47effc9b511dbb0074bba69bee80098317e08038

memory/4464-156-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-157-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-159-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-158-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-160-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-161-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-162-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-164-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-165-0x0000000076EF0000-0x000000007707E000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\2F9.exe

MD5 cdc67700f25eaed1417264c4bdec03d3
SHA1 56639e9414e6ee8394d940d62778475ddf071290
SHA256 fdd4cca0516be799c954e96be26b2d04e42ea0bac1edb00604412914bae2f100
SHA512 a2b38a1d4d0cb57532f3feb2efa1fb345c03df9114dfb2dcc93286e19b96eb5e182bd79d070a0e4fccf1980f47effc9b511dbb0074bba69bee80098317e08038

memory/4464-166-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-167-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-169-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-170-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-168-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-171-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-173-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-174-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-175-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-177-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-176-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-179-0x00000000004C0000-0x000000000060A000-memory.dmp

memory/4464-180-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-178-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-182-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-181-0x00000000004C0000-0x000000000060A000-memory.dmp

memory/4464-183-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-184-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-185-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-187-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-186-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-188-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-189-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-190-0x0000000076EF0000-0x000000007707E000-memory.dmp

memory/4464-213-0x0000000000400000-0x000000000045F000-memory.dmp

memory/4464-214-0x00000000004C0000-0x000000000060A000-memory.dmp

memory/4464-215-0x00000000004C0000-0x000000000060A000-memory.dmp

C:\ProgramData\tlrlj\wpxpdt.exe

MD5 cdc67700f25eaed1417264c4bdec03d3
SHA1 56639e9414e6ee8394d940d62778475ddf071290
SHA256 fdd4cca0516be799c954e96be26b2d04e42ea0bac1edb00604412914bae2f100
SHA512 a2b38a1d4d0cb57532f3feb2efa1fb345c03df9114dfb2dcc93286e19b96eb5e182bd79d070a0e4fccf1980f47effc9b511dbb0074bba69bee80098317e08038

C:\ProgramData\tlrlj\wpxpdt.exe

MD5 cdc67700f25eaed1417264c4bdec03d3
SHA1 56639e9414e6ee8394d940d62778475ddf071290
SHA256 fdd4cca0516be799c954e96be26b2d04e42ea0bac1edb00604412914bae2f100
SHA512 a2b38a1d4d0cb57532f3feb2efa1fb345c03df9114dfb2dcc93286e19b96eb5e182bd79d070a0e4fccf1980f47effc9b511dbb0074bba69bee80098317e08038

memory/3480-265-0x0000000000460000-0x000000000050E000-memory.dmp

memory/3480-266-0x0000000000460000-0x000000000050E000-memory.dmp

memory/3480-267-0x0000000000400000-0x000000000045F000-memory.dmp

memory/3480-269-0x0000000000460000-0x000000000050E000-memory.dmp

memory/3480-270-0x0000000000460000-0x000000000050E000-memory.dmp