smokeloader | 1423053f90855d33858db47f354055b660943104c1c18f848c9b7b415979dc5f

Resubmissions

22-11-2023 17:02

231122-vkac9adg64 10

19-01-2021 19:24

210119-s26yznnqsn 10

19-11-2020 13:14

201119-s41ec6lt86 10

Analysis

max time kernel
1803s
max time network
1815s
platform
windows10_x64
resource
win10v20201028
submitted
19-11-2020 13:14

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Report Analysis Logs

General

Target

HYDRA.exe

Score

10^/10

smokeloader backdoor persistence trojan

Malware Config

Extracted

Family

smokeloader

Version

2017

http://92.53.105.14/

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs

Processes:

svchost.exe

description pid process target process

PID 2888 created 2920 2888 svchost.exe starter.exe
PID 2888 created 2920 2888 svchost.exe starter.exe
Executes dropped EXE 10 IoCs

Processes:

yaya.exeva.exeufx.exesant.exepower.exestarter.exeusc.exeusc.exeusc.exeusc.exe

pid process

2696 yaya.exe
2684 va.exe
2824 ufx.exe
3828 sant.exe
3388 power.exe
2920 starter.exe
1832 usc.exe
3744 usc.exe
1100 usc.exe
364 usc.exe
Drops startup file 1 IoCs

Processes:

va.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HDAudo.vbs va.exe

description	pid	process	target process
PID 2888 created 2920	2888	svchost.exe	starter.exe
PID 2888 created 2920	2888	svchost.exe	starter.exe

pid	process
2696	yaya.exe
2684	va.exe
2824	ufx.exe
3828	sant.exe
3388	power.exe
2920	starter.exe
1832	usc.exe
3744	usc.exe
1100	usc.exe
364	usc.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HDAudo.vbs	va.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Policies = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\ftrfffwb\\rrcfcdif.exe"	explorer.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

sant.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	sant.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	sant.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

SCHTASKS.exeSCHTASKS.exeSCHTASKS.exeSCHTASKS.exe

pid process

3980 SCHTASKS.exe
212 SCHTASKS.exe
640 SCHTASKS.exe
4004 SCHTASKS.exe

pid	process
3980	SCHTASKS.exe
212	SCHTASKS.exe
640	SCHTASKS.exe
4004	SCHTASKS.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

sant.exe

pid	process
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe
3828	sant.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

sant.exe

pid process

3828 sant.exe
3828 sant.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

usc.exesvchost.exestarter.exepowershell.exeusc.exeusc.exeusc.exe

description	pid	process
Token: SeDebugPrivilege	1832	usc.exe
Token: SeTcbPrivilege	2888	svchost.exe
Token: SeTcbPrivilege	2888	svchost.exe
Token: SeDebugPrivilege	2920	starter.exe
Token: SeDebugPrivilege	1152	powershell.exe
Token: SeDebugPrivilege	3744	usc.exe
Token: SeDebugPrivilege	1100	usc.exe
Token: SeDebugPrivilege	364	usc.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

HYDRA.exeufx.exeyaya.exeusc.exestarter.execsc.exesvchost.exesant.exepower.exeusc.exeusc.exeusc.exe

description	pid	process	target process
PID 4092 wrote to memory of 2696	4092	HYDRA.exe	yaya.exe
PID 4092 wrote to memory of 2696	4092	HYDRA.exe	yaya.exe
PID 4092 wrote to memory of 2696	4092	HYDRA.exe	yaya.exe
PID 4092 wrote to memory of 2684	4092	HYDRA.exe	va.exe
PID 4092 wrote to memory of 2684	4092	HYDRA.exe	va.exe
PID 4092 wrote to memory of 2684	4092	HYDRA.exe	va.exe
PID 4092 wrote to memory of 2824	4092	HYDRA.exe	ufx.exe
PID 4092 wrote to memory of 2824	4092	HYDRA.exe	ufx.exe
PID 4092 wrote to memory of 2824	4092	HYDRA.exe	ufx.exe
PID 4092 wrote to memory of 3828	4092	HYDRA.exe	sant.exe
PID 4092 wrote to memory of 3828	4092	HYDRA.exe	sant.exe
PID 4092 wrote to memory of 3828	4092	HYDRA.exe	sant.exe
PID 4092 wrote to memory of 3388	4092	HYDRA.exe	power.exe
PID 4092 wrote to memory of 3388	4092	HYDRA.exe	power.exe
PID 4092 wrote to memory of 3388	4092	HYDRA.exe	power.exe
PID 2824 wrote to memory of 1832	2824	ufx.exe	usc.exe
PID 2824 wrote to memory of 1832	2824	ufx.exe	usc.exe
PID 2824 wrote to memory of 1832	2824	ufx.exe	usc.exe
PID 2696 wrote to memory of 2920	2696	yaya.exe	starter.exe
PID 2696 wrote to memory of 2920	2696	yaya.exe	starter.exe
PID 1832 wrote to memory of 212	1832	usc.exe	SCHTASKS.exe
PID 1832 wrote to memory of 212	1832	usc.exe	SCHTASKS.exe
PID 1832 wrote to memory of 212	1832	usc.exe	SCHTASKS.exe
PID 2920 wrote to memory of 1560	2920	starter.exe	csc.exe
PID 2920 wrote to memory of 1560	2920	starter.exe	csc.exe
PID 1560 wrote to memory of 556	1560	csc.exe	cvtres.exe
PID 1560 wrote to memory of 556	1560	csc.exe	cvtres.exe
PID 2888 wrote to memory of 2912	2888	svchost.exe	cmd.exe
PID 2888 wrote to memory of 2912	2888	svchost.exe	cmd.exe
PID 2888 wrote to memory of 4016	2888	svchost.exe	cmd.exe
PID 2888 wrote to memory of 4016	2888	svchost.exe	cmd.exe
PID 3828 wrote to memory of 2848	3828	sant.exe	explorer.exe
PID 3828 wrote to memory of 2848	3828	sant.exe	explorer.exe
PID 3828 wrote to memory of 2848	3828	sant.exe	explorer.exe
PID 3388 wrote to memory of 1152	3388	power.exe	powershell.exe
PID 3388 wrote to memory of 1152	3388	power.exe	powershell.exe
PID 3388 wrote to memory of 1152	3388	power.exe	powershell.exe
PID 3744 wrote to memory of 640	3744	usc.exe	SCHTASKS.exe
PID 3744 wrote to memory of 640	3744	usc.exe	SCHTASKS.exe
PID 3744 wrote to memory of 640	3744	usc.exe	SCHTASKS.exe
PID 1100 wrote to memory of 4004	1100	usc.exe	SCHTASKS.exe
PID 1100 wrote to memory of 4004	1100	usc.exe	SCHTASKS.exe
PID 1100 wrote to memory of 4004	1100	usc.exe	SCHTASKS.exe
PID 364 wrote to memory of 3980	364	usc.exe	SCHTASKS.exe
PID 364 wrote to memory of 3980	364	usc.exe	SCHTASKS.exe
PID 364 wrote to memory of 3980	364	usc.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\HYDRA.exe
"C:\Users\Admin\AppData\Local\Temp\HYDRA.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4092

C:\Users\Admin\AppData\Roaming\yaya.exe
C:\Users\Admin\AppData\Roaming\yaya.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
"C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2920

C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\qg_8qucl.cmdline"
4⤵
- Suspicious use of WriteProcessMemory
PID:1560

C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES912B.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC912A.tmp"
5⤵
PID:556

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
4⤵
PID:2912

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
4⤵
PID:4016

C:\Users\Admin\AppData\Roaming\va.exe
C:\Users\Admin\AppData\Roaming\va.exe
2⤵
- Executes dropped EXE
- Drops startup file
PID:2684

C:\Users\Admin\AppData\Roaming\ufx.exe
C:\Users\Admin\AppData\Roaming\ufx.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2824

C:\ProgramData\ucp\usc.exe
"C:\ProgramData\ucp\usc.exe" /ucp/usc.exe
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1832

C:\Windows\SysWOW64\SCHTASKS.exe
SCHTASKS /Create /SC MINUTE /MO 10 /F /TN SystemOptimize /TR C:\ProgramData\ucp\usc.exe
4⤵
- Creates scheduled task(s)
PID:212

C:\Users\Admin\AppData\Roaming\sant.exe
C:\Users\Admin\AppData\Roaming\sant.exe
2⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3828

C:\Windows\SysWOW64\explorer.exe
explorer.exe
3⤵
- Adds Run key to start application
PID:2848

C:\Users\Admin\AppData\Roaming\power.exe
C:\Users\Admin\AppData\Roaming\power.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3388

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1152

\??\c:\windows\system32\svchost.exe
c:\windows\system32\svchost.exe -k netsvcs -s seclogon
1⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2888

C:\ProgramData\ucp\usc.exe
C:\ProgramData\ucp\usc.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3744

C:\Windows\SysWOW64\SCHTASKS.exe
SCHTASKS /Create /SC MINUTE /MO 10 /F /TN SystemOptimize /TR C:\ProgramData\ucp\usc.exe
2⤵
- Creates scheduled task(s)
PID:640

C:\ProgramData\ucp\usc.exe
C:\ProgramData\ucp\usc.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1100

C:\Windows\SysWOW64\SCHTASKS.exe
SCHTASKS /Create /SC MINUTE /MO 10 /F /TN SystemOptimize /TR C:\ProgramData\ucp\usc.exe
2⤵
- Creates scheduled task(s)
PID:4004

C:\ProgramData\ucp\usc.exe
C:\ProgramData\ucp\usc.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:364

C:\Windows\SysWOW64\SCHTASKS.exe
SCHTASKS /Create /SC MINUTE /MO 10 /F /TN SystemOptimize /TR C:\ProgramData\ucp\usc.exe
2⤵
- Creates scheduled task(s)
PID:3980

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\ucp\usc.exe

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C:\ProgramData\ucp\usc.exe

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C:\ProgramData\ucp\usc.exe

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C:\ProgramData\ucp\usc.exe

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C:\ProgramData\ucp\usc.exe

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C:\Users\Admin\AppData\Local\Temp\RES912B.tmp

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C:\Users\Admin\AppData\Local\Temp\qg_8qucl.dll

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C:\Users\Admin\AppData\Local\Temp\qg_8qucl.pdb

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C:\Users\Admin\AppData\Roaming\power.exe

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C:\Users\Admin\AppData\Roaming\power.exe

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C:\Users\Admin\AppData\Roaming\sant.exe

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C:\Users\Admin\AppData\Roaming\sant.exe

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C:\Users\Admin\AppData\Roaming\ufx.exe

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C:\Users\Admin\AppData\Roaming\ufx.exe

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C:\Users\Admin\AppData\Roaming\va.exe

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C:\Users\Admin\AppData\Roaming\va.exe

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C:\Users\Admin\AppData\Roaming\yaya.exe

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C:\Users\Admin\AppData\Roaming\yaya.exe

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C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe

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C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe

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\??\c:\Users\Admin\AppData\Local\Temp\CSC912A.tmp

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\??\c:\Users\Admin\AppData\Local\Temp\qg_8qucl.0.cs

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\??\c:\Users\Admin\AppData\Local\Temp\qg_8qucl.cmdline

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memory/212-22-0x0000000000000000-mapping.dmp

Download
memory/556-26-0x0000000000000000-mapping.dmp

Download
memory/640-47-0x0000000000000000-mapping.dmp

Download
memory/1152-43-0x00000000083E0000-0x00000000083E1000-memory.dmp

Filesize
4KB

Download
memory/1152-45-0x00000000094D0000-0x00000000094D1000-memory.dmp

Filesize
4KB

Download
memory/1152-44-0x00000000087F0000-0x00000000087F1000-memory.dmp

Filesize
4KB

Download
memory/1152-42-0x0000000008370000-0x0000000008371000-memory.dmp

Filesize
4KB

Download
memory/1152-41-0x0000000008000000-0x0000000008001000-memory.dmp

Filesize
4KB

Download
memory/1152-40-0x0000000007F90000-0x0000000007F91000-memory.dmp

Filesize
4KB

Download
memory/1152-39-0x0000000007DC0000-0x0000000007DC1000-memory.dmp

Filesize
4KB

Download
memory/1152-38-0x00000000074E0000-0x00000000074E1000-memory.dmp

Filesize
4KB

Download
memory/1152-34-0x0000000000000000-mapping.dmp

Download
memory/1152-35-0x0000000071BC0000-0x00000000722AE000-memory.dmp

Filesize
6.9MB

Download
memory/1152-36-0x0000000006F00000-0x0000000006F01000-memory.dmp

Filesize
4KB

Download
memory/1152-37-0x0000000007690000-0x0000000007691000-memory.dmp

Filesize
4KB

Download
memory/1560-23-0x0000000000000000-mapping.dmp

Download
memory/1832-18-0x0000000000000000-mapping.dmp

Download
memory/2684-2-0x0000000000000000-mapping.dmp

Download
memory/2696-0-0x0000000000000000-mapping.dmp

Download
memory/2824-4-0x0000000000000000-mapping.dmp

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memory/2848-31-0x0000000000000000-mapping.dmp

Download
memory/2848-33-0x0000000000B90000-0x0000000000FCF000-memory.dmp

Filesize
4.2MB

Download
memory/2848-32-0x0000000000B90000-0x0000000000FCF000-memory.dmp

Filesize
4.2MB

Download
memory/2920-15-0x0000000000000000-mapping.dmp

Download
memory/2920-21-0x00007FFFCF010000-0x00007FFFCF9B0000-memory.dmp

Filesize
9.6MB

Download
memory/3388-12-0x0000000000000000-mapping.dmp

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memory/3828-9-0x0000000000000000-mapping.dmp

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memory/3980-51-0x0000000000000000-mapping.dmp

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memory/4004-49-0x0000000000000000-mapping.dmp

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