smokeloader | a2d3d6430f6775951cf988d960cfae4093d7a1e4d0f684ddfffaf4599ace9a71

Resubmissions

18-11-2020 14:18

201118-dj27sn3f52 10

18-11-2020 13:42

201118-1arz86e7w6 10

18-11-2020 13:38

201118-n8jh228ctn 10

Analysis

max time kernel
1802s
max time network
1813s
platform
windows10_x64
resource
win10v20201028
submitted
18-11-2020 14:18

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Report Analysis Logs

General

Target

HYDRA.bin.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 1640 created 3880 1640 svchost.exe starter.exe
PID 1640 created 3880 1640 svchost.exe starter.exe
Executes dropped EXE 10 IoCs

Processes:

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

pid process

2456 yaya.exe
2536 va.exe
2800 ufx.exe
3204 sant.exe
4072 power.exe
3880 starter.exe
2960 usc.exe
3952 usc.exe
4076 usc.exe
1192 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 1640 created 3880	1640	svchost.exe	starter.exe
PID 1640 created 3880	1640	svchost.exe	starter.exe

pid	process
2456	yaya.exe
2536	va.exe
2800	ufx.exe
3204	sant.exe
4072	power.exe
3880	starter.exe
2960	usc.exe
3952	usc.exe
4076	usc.exe
1192	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-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft OneDrive = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\asjjtigb\\tbdvjsvi.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

3608 SCHTASKS.exe
812 SCHTASKS.exe
3876 SCHTASKS.exe
3944 SCHTASKS.exe

pid	process
3608	SCHTASKS.exe
812	SCHTASKS.exe
3876	SCHTASKS.exe
3944	SCHTASKS.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

sant.exe

pid	process
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe
3204	sant.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

sant.exe

pid process

3204 sant.exe
3204 sant.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

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

description	pid	process
Token: SeDebugPrivilege	2960	usc.exe
Token: SeTcbPrivilege	1640	svchost.exe
Token: SeTcbPrivilege	1640	svchost.exe
Token: SeDebugPrivilege	3880	starter.exe
Token: SeDebugPrivilege	3676	powershell.exe
Token: SeDebugPrivilege	3952	usc.exe
Token: SeDebugPrivilege	4076	usc.exe
Token: SeDebugPrivilege	1192	usc.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

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

description	pid	process	target process
PID 1876 wrote to memory of 2456	1876	HYDRA.bin.exe	yaya.exe
PID 1876 wrote to memory of 2456	1876	HYDRA.bin.exe	yaya.exe
PID 1876 wrote to memory of 2456	1876	HYDRA.bin.exe	yaya.exe
PID 1876 wrote to memory of 2536	1876	HYDRA.bin.exe	va.exe
PID 1876 wrote to memory of 2536	1876	HYDRA.bin.exe	va.exe
PID 1876 wrote to memory of 2536	1876	HYDRA.bin.exe	va.exe
PID 1876 wrote to memory of 2800	1876	HYDRA.bin.exe	ufx.exe
PID 1876 wrote to memory of 2800	1876	HYDRA.bin.exe	ufx.exe
PID 1876 wrote to memory of 2800	1876	HYDRA.bin.exe	ufx.exe
PID 1876 wrote to memory of 3204	1876	HYDRA.bin.exe	sant.exe
PID 1876 wrote to memory of 3204	1876	HYDRA.bin.exe	sant.exe
PID 1876 wrote to memory of 3204	1876	HYDRA.bin.exe	sant.exe
PID 1876 wrote to memory of 4072	1876	HYDRA.bin.exe	power.exe
PID 1876 wrote to memory of 4072	1876	HYDRA.bin.exe	power.exe
PID 1876 wrote to memory of 4072	1876	HYDRA.bin.exe	power.exe
PID 2456 wrote to memory of 3880	2456	yaya.exe	starter.exe
PID 2456 wrote to memory of 3880	2456	yaya.exe	starter.exe
PID 2800 wrote to memory of 2960	2800	ufx.exe	usc.exe
PID 2800 wrote to memory of 2960	2800	ufx.exe	usc.exe
PID 2800 wrote to memory of 2960	2800	ufx.exe	usc.exe
PID 2960 wrote to memory of 3608	2960	usc.exe	SCHTASKS.exe
PID 2960 wrote to memory of 3608	2960	usc.exe	SCHTASKS.exe
PID 2960 wrote to memory of 3608	2960	usc.exe	SCHTASKS.exe
PID 3204 wrote to memory of 1332	3204	sant.exe	explorer.exe
PID 3204 wrote to memory of 1332	3204	sant.exe	explorer.exe
PID 3204 wrote to memory of 1332	3204	sant.exe	explorer.exe
PID 3880 wrote to memory of 3200	3880	starter.exe	csc.exe
PID 3880 wrote to memory of 3200	3880	starter.exe	csc.exe
PID 3200 wrote to memory of 3936	3200	csc.exe	cvtres.exe
PID 3200 wrote to memory of 3936	3200	csc.exe	cvtres.exe
PID 1640 wrote to memory of 3268	1640	svchost.exe	cmd.exe
PID 1640 wrote to memory of 3268	1640	svchost.exe	cmd.exe
PID 1640 wrote to memory of 1012	1640	svchost.exe	cmd.exe
PID 1640 wrote to memory of 1012	1640	svchost.exe	cmd.exe
PID 4072 wrote to memory of 3676	4072	power.exe	powershell.exe
PID 4072 wrote to memory of 3676	4072	power.exe	powershell.exe
PID 4072 wrote to memory of 3676	4072	power.exe	powershell.exe
PID 3952 wrote to memory of 812	3952	usc.exe	SCHTASKS.exe
PID 3952 wrote to memory of 812	3952	usc.exe	SCHTASKS.exe
PID 3952 wrote to memory of 812	3952	usc.exe	SCHTASKS.exe
PID 4076 wrote to memory of 3876	4076	usc.exe	SCHTASKS.exe
PID 4076 wrote to memory of 3876	4076	usc.exe	SCHTASKS.exe
PID 4076 wrote to memory of 3876	4076	usc.exe	SCHTASKS.exe
PID 1192 wrote to memory of 3944	1192	usc.exe	SCHTASKS.exe
PID 1192 wrote to memory of 3944	1192	usc.exe	SCHTASKS.exe
PID 1192 wrote to memory of 3944	1192	usc.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\HYDRA.bin.exe
"C:\Users\Admin\AppData\Local\Temp\HYDRA.bin.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1876

C:\Users\Admin\AppData\Roaming\yaya.exe
C:\Users\Admin\AppData\Roaming\yaya.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2456

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:3880

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\fu_ok1z6.cmdline"
4⤵
- Suspicious use of WriteProcessMemory
PID:3200

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\RESB9E1.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCB9E0.tmp"
5⤵
PID:3936

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
4⤵
PID:3268

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
4⤵
PID:1012

C:\Users\Admin\AppData\Roaming\va.exe
C:\Users\Admin\AppData\Roaming\va.exe
2⤵
- Executes dropped EXE
- Drops startup file
PID:2536

C:\Users\Admin\AppData\Roaming\ufx.exe
C:\Users\Admin\AppData\Roaming\ufx.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2800

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:2960

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:3608

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:3204

C:\Windows\SysWOW64\explorer.exe
explorer.exe
3⤵
- Adds Run key to start application
PID:1332

C:\Users\Admin\AppData\Roaming\power.exe
C:\Users\Admin\AppData\Roaming\power.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4072

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:3676

\??\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:1640

C:\ProgramData\ucp\usc.exe
C:\ProgramData\ucp\usc.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3952

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:812

C:\ProgramData\ucp\usc.exe
C:\ProgramData\ucp\usc.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4076

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:3876

C:\ProgramData\ucp\usc.exe
C:\ProgramData\ucp\usc.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1192

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:3944

Network

MITRE ATT&CK Enterprise 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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

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\RESB9E1.tmp

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C:\Users\Admin\AppData\Local\Temp\fu_ok1z6.dll

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C:\Users\Admin\AppData\Local\Temp\fu_ok1z6.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\CSCB9E0.tmp

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\??\c:\Users\Admin\AppData\Local\Temp\fu_ok1z6.0.cs

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\??\c:\Users\Admin\AppData\Local\Temp\fu_ok1z6.cmdline

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memory/812-47-0x0000000000000000-mapping.dmp

Download
memory/1332-25-0x0000000000120000-0x000000000055F000-memory.dmp

Filesize
4.2MB

Download
memory/1332-24-0x0000000000120000-0x000000000055F000-memory.dmp

Filesize
4.2MB

Download
memory/1332-23-0x0000000000000000-mapping.dmp

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memory/2456-0-0x0000000000000000-mapping.dmp

Download
memory/2536-3-0x0000000000000000-mapping.dmp

Download
memory/2800-6-0x0000000000000000-mapping.dmp

Download
memory/2960-18-0x0000000000000000-mapping.dmp

Download
memory/3200-26-0x0000000000000000-mapping.dmp

Download
memory/3204-9-0x0000000000000000-mapping.dmp

Download
memory/3608-21-0x0000000000000000-mapping.dmp

Download
memory/3676-37-0x0000000007370000-0x0000000007371000-memory.dmp

Filesize
4KB

Download
memory/3676-43-0x0000000008440000-0x0000000008441000-memory.dmp

Filesize
4KB

Download
memory/3676-36-0x0000000006D00000-0x0000000006D01000-memory.dmp

Filesize
4KB

Download
memory/3676-34-0x0000000000000000-mapping.dmp

Download
memory/3676-38-0x00000000079E0000-0x00000000079E1000-memory.dmp

Filesize
4KB

Download
memory/3676-39-0x0000000007B60000-0x0000000007B61000-memory.dmp

Filesize
4KB

Download
memory/3676-40-0x0000000007CD0000-0x0000000007CD1000-memory.dmp

Filesize
4KB

Download
memory/3676-41-0x0000000007DC0000-0x0000000007DC1000-memory.dmp

Filesize
4KB

Download
memory/3676-42-0x0000000008150000-0x0000000008151000-memory.dmp

Filesize
4KB

Download
memory/3676-35-0x0000000071AF0000-0x00000000721DE000-memory.dmp

Filesize
6.9MB

Download
memory/3676-44-0x00000000085B0000-0x00000000085B1000-memory.dmp

Filesize
4KB

Download
memory/3676-45-0x0000000009310000-0x0000000009311000-memory.dmp

Filesize
4KB

Download
memory/3876-49-0x0000000000000000-mapping.dmp

Download
memory/3880-15-0x0000000000000000-mapping.dmp

Download
memory/3880-22-0x00007FF896C60000-0x00007FF897600000-memory.dmp

Filesize
9.6MB

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memory/3936-29-0x0000000000000000-mapping.dmp

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memory/3944-51-0x0000000000000000-mapping.dmp

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memory/4072-12-0x0000000000000000-mapping.dmp

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