smokeloader | 668b3ed6f31fce4a65e5bf64bc17a92e1d9b40e8de7627508036cf6e111070bc

Analysis

max time kernel
148s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
29-03-2023 01:40

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General

Target

setup.exe
Size

293KB
MD5

80de2350870cc82e277f9b19c71e398d
SHA1

cfafa1f2789b494c86d329370e28d7c29773600d
SHA256

668b3ed6f31fce4a65e5bf64bc17a92e1d9b40e8de7627508036cf6e111070bc
SHA512

299d16184a5821405ab66a785a59a558effa5af23596dc5853926763fedd0421a0a012121b5e8790a1a0d309cf1c78ccd3480e218ceb4259a65c0d3a345e8db1
SSDEEP

3072:iEJ/+k9A2BOlMG9qx494GRs1nhCmPQUJo7u9uG77u4Qc78ToWvQfo:/XtBuV9qDHRo2uuu4QcN

Score

10^/10

smokeloader lab backdoor trojan

Malware Config

Extracted

Family

smokeloader

Botnet

lab

Extracted

Family

smokeloader

Version

2020

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Suspicious use of SetThreadContext 1 IoCs

Processes:

setup.exe

description pid process target process

PID 616 set thread context of 3300 616 setup.exe setup.exe

description	pid	process	target process
PID 616 set thread context of 3300	616	setup.exe	setup.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

setup.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	setup.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	setup.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	setup.exe

Modifies registry class 3 IoCs

Processes:

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

setup.exe

pid	process
3300	setup.exe
3300	setup.exe
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Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid process

3220
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

setup.exe

pid process

3300 setup.exe

pid	process
3220

Suspicious use of AdjustPrivilegeToken 16 IoCs

Processes:

description	pid	process
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220
Token: SeShutdownPrivilege	3220
Token: SeCreatePagefilePrivilege	3220

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

pid process

3220
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3220
3220

pid	process
3220
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Suspicious use of WriteProcessMemory 6 IoCs

Processes:

setup.exe

description	pid	process	target process
PID 616 wrote to memory of 3300	616	setup.exe	setup.exe
PID 616 wrote to memory of 3300	616	setup.exe	setup.exe
PID 616 wrote to memory of 3300	616	setup.exe	setup.exe
PID 616 wrote to memory of 3300	616	setup.exe	setup.exe
PID 616 wrote to memory of 3300	616	setup.exe	setup.exe
PID 616 wrote to memory of 3300	616	setup.exe	setup.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:616

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe"
2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:3300

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/616-135-0x0000000002C50000-0x0000000002C59000-memory.dmp

Filesize
36KB

Download
memory/3220-137-0x0000000001430000-0x0000000001446000-memory.dmp

Filesize
88KB

Download
memory/3300-134-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3300-136-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3300-138-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download