smokeloader | 14d3de400577204d2d4d09d93f879eb8f7a908ac18b9c11dd355f99598150762

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
26-04-2023 00:19

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General

Target

setup.exe
Size

215KB
MD5

ac58b4dc899036f837404a697316d44e
SHA1

2f01b29edf034d2d9f0bd28bf733bc0122b36b3e
SHA256

14d3de400577204d2d4d09d93f879eb8f7a908ac18b9c11dd355f99598150762
SHA512

654a893c0ba1a45520d534af983b934e5c49f615c631b49c36ebf05bd911e7a8c718fc7779541954dffb723daa330b86e8204214e7772c1b723e3824b0b60f34
SSDEEP

3072:Rsovj9xoz9Vx0OQxjHLatOvJfzBHldJCEvpWjOOkHoZ5yaW26r0c:hjOVnQxbBHMiWjOzza

Score

10^/10

smokeloader pub1 backdoor trojan

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

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

Executes dropped EXE 2 IoCs

pid	Process
1996	trwtbrr
4012	trwtbrr

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5076 set thread context of 4020	5076	setup.exe	82
PID 1996 set thread context of 4012	1996	trwtbrr	86

Checks SCSI registry key(s) 3 TTPs 6 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	trwtbrr
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	trwtbrr
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	trwtbrr

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4020	setup.exe
4020	setup.exe
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found
660	Process not Found

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
660	Process not Found

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4020	setup.exe
4012	trwtbrr

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	660	Process not Found
Token: SeCreatePagefilePrivilege	660	Process not Found

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5076 wrote to memory of 4020	5076	setup.exe	82
PID 5076 wrote to memory of 4020	5076	setup.exe	82
PID 5076 wrote to memory of 4020	5076	setup.exe	82
PID 5076 wrote to memory of 4020	5076	setup.exe	82
PID 5076 wrote to memory of 4020	5076	setup.exe	82
PID 5076 wrote to memory of 4020	5076	setup.exe	82
PID 1996 wrote to memory of 4012	1996	trwtbrr	86
PID 1996 wrote to memory of 4012	1996	trwtbrr	86
PID 1996 wrote to memory of 4012	1996	trwtbrr	86
PID 1996 wrote to memory of 4012	1996	trwtbrr	86
PID 1996 wrote to memory of 4012	1996	trwtbrr	86
PID 1996 wrote to memory of 4012	1996	trwtbrr	86

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:5076
- 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:4020

C:\Users\Admin\AppData\Roaming\trwtbrr
C:\Users\Admin\AppData\Roaming\trwtbrr
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Users\Admin\AppData\Roaming\trwtbrr
  C:\Users\Admin\AppData\Roaming\trwtbrr
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious behavior: MapViewOfSection
  PID:4012

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

C:\Users\Admin\AppData\Roaming\trwtbrr

Filesize
215KB

MD5
ac58b4dc899036f837404a697316d44e

SHA1
2f01b29edf034d2d9f0bd28bf733bc0122b36b3e

SHA256
14d3de400577204d2d4d09d93f879eb8f7a908ac18b9c11dd355f99598150762

SHA512
654a893c0ba1a45520d534af983b934e5c49f615c631b49c36ebf05bd911e7a8c718fc7779541954dffb723daa330b86e8204214e7772c1b723e3824b0b60f34

Download Submit
C:\Users\Admin\AppData\Roaming\trwtbrr

Filesize
215KB

MD5
ac58b4dc899036f837404a697316d44e

SHA1
2f01b29edf034d2d9f0bd28bf733bc0122b36b3e

SHA256
14d3de400577204d2d4d09d93f879eb8f7a908ac18b9c11dd355f99598150762

SHA512
654a893c0ba1a45520d534af983b934e5c49f615c631b49c36ebf05bd911e7a8c718fc7779541954dffb723daa330b86e8204214e7772c1b723e3824b0b60f34

Download Submit
C:\Users\Admin\AppData\Roaming\trwtbrr

Filesize
215KB

MD5
ac58b4dc899036f837404a697316d44e

SHA1
2f01b29edf034d2d9f0bd28bf733bc0122b36b3e

SHA256
14d3de400577204d2d4d09d93f879eb8f7a908ac18b9c11dd355f99598150762

SHA512
654a893c0ba1a45520d534af983b934e5c49f615c631b49c36ebf05bd911e7a8c718fc7779541954dffb723daa330b86e8204214e7772c1b723e3824b0b60f34

Download Submit
memory/660-137-0x0000000000C70000-0x0000000000C86000-memory.dmp

Filesize
88KB

Download
memory/660-151-0x0000000002C40000-0x0000000002C56000-memory.dmp

Filesize
88KB

Download
memory/4012-150-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4012-154-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4020-134-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4020-136-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4020-138-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/5076-135-0x00000000001F0000-0x00000000001F9000-memory.dmp

Filesize
36KB

Download