smokeloader | 1bf6d14c4b5f59aa30882f4aa25e9e9d703dac905a785fe020ff667600e5fc97

Analysis

max time kernel
302s
max time network
312s
platform
windows10_x64
resource
win10v20201028
submitted
18-11-2020 15:58

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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 1392 created 1512 1392 svchost.exe starter.exe
PID 1392 created 1512 1392 svchost.exe starter.exe
Executes dropped EXE 7 IoCs

Processes:

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

pid process

3980 yaya.exe
3768 va.exe
1004 ufx.exe
3644 sant.exe
3052 power.exe
1512 starter.exe
2064 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 1392 created 1512	1392	svchost.exe	starter.exe
PID 1392 created 1512	1392	svchost.exe	starter.exe

pid	process
3980	yaya.exe
3768	va.exe
1004	ufx.exe
3644	sant.exe
3052	power.exe
1512	starter.exe
2064	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\ODBC = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\rrwrffrg\\vbaecijr.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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

SCHTASKS.exe

pid process

3740 SCHTASKS.exe

pid	process
3740	SCHTASKS.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

sant.exe

pid	process
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe
3644	sant.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

sant.exe

pid process

3644 sant.exe
3644 sant.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

usc.exesvchost.exestarter.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2064	usc.exe
Token: SeTcbPrivilege	1392	svchost.exe
Token: SeTcbPrivilege	1392	svchost.exe
Token: SeDebugPrivilege	1512	starter.exe
Token: SeDebugPrivilege	980	powershell.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

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

description	pid	process	target process
PID 1180 wrote to memory of 3980	1180	HYDRA.exe	yaya.exe
PID 1180 wrote to memory of 3980	1180	HYDRA.exe	yaya.exe
PID 1180 wrote to memory of 3980	1180	HYDRA.exe	yaya.exe
PID 1180 wrote to memory of 3768	1180	HYDRA.exe	va.exe
PID 1180 wrote to memory of 3768	1180	HYDRA.exe	va.exe
PID 1180 wrote to memory of 3768	1180	HYDRA.exe	va.exe
PID 1180 wrote to memory of 1004	1180	HYDRA.exe	ufx.exe
PID 1180 wrote to memory of 1004	1180	HYDRA.exe	ufx.exe
PID 1180 wrote to memory of 1004	1180	HYDRA.exe	ufx.exe
PID 1180 wrote to memory of 3644	1180	HYDRA.exe	sant.exe
PID 1180 wrote to memory of 3644	1180	HYDRA.exe	sant.exe
PID 1180 wrote to memory of 3644	1180	HYDRA.exe	sant.exe
PID 1180 wrote to memory of 3052	1180	HYDRA.exe	power.exe
PID 1180 wrote to memory of 3052	1180	HYDRA.exe	power.exe
PID 1180 wrote to memory of 3052	1180	HYDRA.exe	power.exe
PID 3980 wrote to memory of 1512	3980	yaya.exe	starter.exe
PID 3980 wrote to memory of 1512	3980	yaya.exe	starter.exe
PID 1004 wrote to memory of 2064	1004	ufx.exe	usc.exe
PID 1004 wrote to memory of 2064	1004	ufx.exe	usc.exe
PID 1004 wrote to memory of 2064	1004	ufx.exe	usc.exe
PID 2064 wrote to memory of 3740	2064	usc.exe	SCHTASKS.exe
PID 2064 wrote to memory of 3740	2064	usc.exe	SCHTASKS.exe
PID 2064 wrote to memory of 3740	2064	usc.exe	SCHTASKS.exe
PID 1512 wrote to memory of 3592	1512	starter.exe	csc.exe
PID 1512 wrote to memory of 3592	1512	starter.exe	csc.exe
PID 3592 wrote to memory of 904	3592	csc.exe	cvtres.exe
PID 3592 wrote to memory of 904	3592	csc.exe	cvtres.exe
PID 1392 wrote to memory of 1520	1392	svchost.exe	cmd.exe
PID 1392 wrote to memory of 1520	1392	svchost.exe	cmd.exe
PID 1392 wrote to memory of 3176	1392	svchost.exe	cmd.exe
PID 1392 wrote to memory of 3176	1392	svchost.exe	cmd.exe
PID 3644 wrote to memory of 184	3644	sant.exe	explorer.exe
PID 3644 wrote to memory of 184	3644	sant.exe	explorer.exe
PID 3644 wrote to memory of 184	3644	sant.exe	explorer.exe
PID 3052 wrote to memory of 980	3052	power.exe	powershell.exe
PID 3052 wrote to memory of 980	3052	power.exe	powershell.exe
PID 3052 wrote to memory of 980	3052	power.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\HYDRA.exe
"C:\Users\Admin\AppData\Local\Temp\HYDRA.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1180

C:\Users\Admin\AppData\Roaming\yaya.exe
C:\Users\Admin\AppData\Roaming\yaya.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3980

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:1512

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\vtcbe0-l.cmdline"
4⤵
- Suspicious use of WriteProcessMemory
PID:3592

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\RESB56C.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCB55B.tmp"
5⤵
PID:904

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
4⤵
PID:1520

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
4⤵
PID:3176

C:\Users\Admin\AppData\Roaming\va.exe
C:\Users\Admin\AppData\Roaming\va.exe
2⤵
- Executes dropped EXE
- Drops startup file
PID:3768

C:\Users\Admin\AppData\Roaming\ufx.exe
C:\Users\Admin\AppData\Roaming\ufx.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1004

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:2064

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:3740

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:3644

C:\Windows\SysWOW64\explorer.exe
explorer.exe
3⤵
- Adds Run key to start application
PID:184

C:\Users\Admin\AppData\Roaming\power.exe
C:\Users\Admin\AppData\Roaming\power.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3052

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:980

\??\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:1392

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:\Users\Admin\AppData\Local\Temp\RESB56C.tmp

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C:\Users\Admin\AppData\Local\Temp\vtcbe0-l.dll

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C:\Users\Admin\AppData\Local\Temp\vtcbe0-l.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\CSCB55B.tmp

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\??\c:\Users\Admin\AppData\Local\Temp\vtcbe0-l.0.cs

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\??\c:\Users\Admin\AppData\Local\Temp\vtcbe0-l.cmdline

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memory/184-33-0x00000000011F0000-0x000000000162F000-memory.dmp

Filesize
4.2MB

Download
memory/184-32-0x00000000011F0000-0x000000000162F000-memory.dmp

Filesize
4.2MB

Download
memory/184-31-0x0000000000000000-mapping.dmp

Download
memory/904-26-0x0000000000000000-mapping.dmp

Download
memory/980-35-0x0000000071E90000-0x000000007257E000-memory.dmp

Filesize
6.9MB

Download
memory/980-41-0x0000000008460000-0x0000000008461000-memory.dmp

Filesize
4KB

Download
memory/980-44-0x0000000008C40000-0x0000000008C41000-memory.dmp

Filesize
4KB

Download
memory/980-39-0x0000000007B90000-0x0000000007B91000-memory.dmp

Filesize
4KB

Download
memory/980-43-0x0000000008800000-0x0000000008801000-memory.dmp

Filesize
4KB

Download
memory/980-45-0x0000000009960000-0x0000000009961000-memory.dmp

Filesize
4KB

Download
memory/980-40-0x00000000083F0000-0x00000000083F1000-memory.dmp

Filesize
4KB

Download
memory/980-38-0x0000000007940000-0x0000000007941000-memory.dmp

Filesize
4KB

Download
memory/980-37-0x0000000007C50000-0x0000000007C51000-memory.dmp

Filesize
4KB

Download
memory/980-42-0x00000000087B0000-0x00000000087B1000-memory.dmp

Filesize
4KB

Download
memory/980-34-0x0000000000000000-mapping.dmp

Download
memory/980-36-0x0000000004FC0000-0x0000000004FC1000-memory.dmp

Filesize
4KB

Download
memory/1004-6-0x0000000000000000-mapping.dmp

Download
memory/1512-15-0x0000000000000000-mapping.dmp

Download
memory/1512-19-0x00007FFC68EA0000-0x00007FFC69840000-memory.dmp

Filesize
9.6MB

Download
memory/2064-18-0x0000000000000000-mapping.dmp

Download
memory/3052-12-0x0000000000000000-mapping.dmp

Download
memory/3592-23-0x0000000000000000-mapping.dmp

Download
memory/3644-7-0x0000000000000000-mapping.dmp

Download
memory/3740-22-0x0000000000000000-mapping.dmp

Download
memory/3768-1-0x0000000000000000-mapping.dmp

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

Download