smokeloader | a7c93ad768ca71ba422bf5e8771668b3c85450c0747ecdcdb8785a84a99b3548

Analysis

max time kernel
150s
max time network
131s
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 01:54

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General

Target

setup.exe
Size

296KB
MD5

bdfa203e8e4e627fa880a19bcc47a608
SHA1

c638dfaf4ca653123139ae300a3ad2e5585294af
SHA256

a7c93ad768ca71ba422bf5e8771668b3c85450c0747ecdcdb8785a84a99b3548
SHA512

0df58c002fe95641b06058301ca656eb5311cbb0e86593e305d6fab84f89cb8dd467dd2ce8f052b83b8d5bc47ef4463fffa66a5e554e10202988b00c8d0a24ad
SSDEEP

3072:dxQZ4YEv4bVS2yJmhTeyMu3TAy6OPBXQ1Kpax6e0Ayhk4AndTOWvQfu:bvt4bVAmhN6gyxGAya4

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 4232 set thread context of 792 4232 setup.exe setup.exe

description	pid	process	target process
PID 4232 set thread context of 792	4232	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 queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	setup.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	setup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	setup.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

setup.exe

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

Processes:

pid process

3116
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

setup.exe

pid process

792 setup.exe

pid	process
3116

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

setup.exe

description	pid	process	target process
PID 4232 wrote to memory of 792	4232	setup.exe	setup.exe
PID 4232 wrote to memory of 792	4232	setup.exe	setup.exe
PID 4232 wrote to memory of 792	4232	setup.exe	setup.exe
PID 4232 wrote to memory of 792	4232	setup.exe	setup.exe
PID 4232 wrote to memory of 792	4232	setup.exe	setup.exe
PID 4232 wrote to memory of 792	4232	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:4232

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:792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/792-134-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/792-136-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/792-138-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3116-137-0x0000000002390000-0x00000000023A6000-memory.dmp

Filesize
88KB

Download
memory/4232-135-0x00000000001F0000-0x00000000001F9000-memory.dmp

Filesize
36KB

Download