smokeloader | 19675bca8b5bd178071602a07aabf48c756f0405afb9611c504d068c9c2fead0

General

Target

0c8e4aa60d747e6cd2b7620d94aa0807.exe
Size

154KB
MD5

0c8e4aa60d747e6cd2b7620d94aa0807
SHA1

8160a630e552f81f863f5500d2718b161b268a2f
SHA256

19675bca8b5bd178071602a07aabf48c756f0405afb9611c504d068c9c2fead0
SHA512

b4db9f97010738ca64fe34b51cce06eddfcbb5c12fe4bf0599db946874b49e9f14ab56e9b92d67af1d054272573cf06af543358f1ce1229b5a26847e294c6bbd

Score

10^/10

smokeloader backdoor trojan upx

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://vtdilet.com/upload/

http://netvxi.com/upload/

http://tinnys.monster/upload/

rc4.i32

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Executes dropped EXE 1 IoCs

Processes:

EC33.exe

pid process

1656 EC33.exe

pid	process
1656	EC33.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\EC33.exe	upx
C:\Users\Admin\AppData\Local\Temp\EC33.exe	upx

Deletes itself 1 IoCs

Processes:

pid process

1260
Loads dropped DLL 5 IoCs

Processes:

0c8e4aa60d747e6cd2b7620d94aa0807.exerundll32.exe

pid process

1680 0c8e4aa60d747e6cd2b7620d94aa0807.exe
1716 rundll32.exe
1716 rundll32.exe
1716 rundll32.exe
1716 rundll32.exe

pid	process
1260

Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

0c8e4aa60d747e6cd2b7620d94aa0807.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	0c8e4aa60d747e6cd2b7620d94aa0807.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	0c8e4aa60d747e6cd2b7620d94aa0807.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	0c8e4aa60d747e6cd2b7620d94aa0807.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

560 timeout.exe

pid	process
560	timeout.exe

Suspicious behavior: EnumeratesProcesses 774 IoCs

Processes:

0c8e4aa60d747e6cd2b7620d94aa0807.exe

pid	process
1680	0c8e4aa60d747e6cd2b7620d94aa0807.exe
1680	0c8e4aa60d747e6cd2b7620d94aa0807.exe
1260
1260
1260
1260
1260
1260
1260
1260
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1260
1260
1260
1260
1260
1260
1260
1260
1260
1260
1260
1260
1260
1260

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

0c8e4aa60d747e6cd2b7620d94aa0807.exe

pid process

1680 0c8e4aa60d747e6cd2b7620d94aa0807.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

pid process

1260
1260
1260
1260
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

pid process

1260
1260
1260
1260

pid	process
1260
1260
1260
1260

pid	process
1260
1260
1260
1260

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

EC33.execmd.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1260 wrote to memory of 1656	1260		EC33.exe
PID 1260 wrote to memory of 1656	1260		EC33.exe
PID 1260 wrote to memory of 1656	1260		EC33.exe
PID 1260 wrote to memory of 1656	1260		EC33.exe
PID 1656 wrote to memory of 424	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 424	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 424	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 424	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1484	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1484	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1484	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1484	1656	EC33.exe	cmd.exe
PID 1484 wrote to memory of 560	1484	cmd.exe	timeout.exe
PID 1484 wrote to memory of 560	1484	cmd.exe	timeout.exe
PID 1484 wrote to memory of 560	1484	cmd.exe	timeout.exe
PID 1484 wrote to memory of 560	1484	cmd.exe	timeout.exe
PID 424 wrote to memory of 436	424	cmd.exe	reg.exe
PID 424 wrote to memory of 436	424	cmd.exe	reg.exe
PID 424 wrote to memory of 436	424	cmd.exe	reg.exe
PID 424 wrote to memory of 436	424	cmd.exe	reg.exe
PID 1656 wrote to memory of 1952	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1952	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1952	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1952	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1856	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1856	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1856	1656	EC33.exe	cmd.exe
PID 1656 wrote to memory of 1856	1656	EC33.exe	cmd.exe
PID 1952 wrote to memory of 1612	1952	cmd.exe	reg.exe
PID 1952 wrote to memory of 1612	1952	cmd.exe	reg.exe
PID 1952 wrote to memory of 1612	1952	cmd.exe	reg.exe
PID 1952 wrote to memory of 1612	1952	cmd.exe	reg.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe
PID 1856 wrote to memory of 1716	1856	cmd.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\0c8e4aa60d747e6cd2b7620d94aa0807.exe
"C:\Users\Admin\AppData\Local\Temp\0c8e4aa60d747e6cd2b7620d94aa0807.exe"
1⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1680

C:\Users\Admin\AppData\Local\Temp\EC33.exe
C:\Users\Admin\AppData\Local\Temp\EC33.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1656

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe /f
2⤵
- Suspicious use of WriteProcessMemory
PID:424

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe /f
3⤵
PID:436

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C timeout /t 60 && SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.exe /F
2⤵
- Suspicious use of WriteProcessMemory
PID:1484

C:\Windows\SysWOW64\timeout.exe
timeout /t 60
3⤵
- Delays execution with timeout.exe
PID:560

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll /f && EXIT 0
2⤵
- Suspicious use of WriteProcessMemory
PID:1952

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll /f
3⤵
PID:1612

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C rundll32.exe C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll, UserModeExport
2⤵
- Suspicious use of WriteProcessMemory
PID:1856

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll, UserModeExport
3⤵
- Loads dropped DLL
PID:1716

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll
MD5
e835f27f6b6a2b0af42873ce2cc6cc07

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
C:\Users\Admin\AppData\Local\Temp\EC33.exe
MD5
57a9c6d1f80eec2792d26d5903a9228b

SHA1
15455de7cb21d125651d9cf88b23af2953bfa96f

SHA256
b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

SHA512
0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

Download Submit
C:\Users\Admin\AppData\Local\Temp\EC33.exe
MD5
57a9c6d1f80eec2792d26d5903a9228b

SHA1
15455de7cb21d125651d9cf88b23af2953bfa96f

SHA256
b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

SHA512
0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

Download Submit
\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll
MD5
e835f27f6b6a2b0af42873ce2cc6cc07

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll
MD5
e835f27f6b6a2b0af42873ce2cc6cc07

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll
MD5
e835f27f6b6a2b0af42873ce2cc6cc07

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
\ProgramData\NetHelper\Cache\ZJXyrNMUWtmvZPkZFeLe\nethelper.dll
MD5
e835f27f6b6a2b0af42873ce2cc6cc07

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
\Users\Admin\AppData\Local\Temp\CC4F.tmp
MD5
d124f55b9393c976963407dff51ffa79

SHA1
2c7bbedd79791bfb866898c85b504186db610b5d

SHA256
ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef

SHA512
278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

Download Submit
memory/424-10-0x0000000000000000-mapping.dmp

Download
memory/436-14-0x0000000000000000-mapping.dmp

Download
memory/560-13-0x0000000000000000-mapping.dmp

Download
memory/696-15-0x000007FEF6460000-0x000007FEF66DA000-memory.dmp

Filesize
2.5MB

Download
memory/1260-5-0x0000000002E20000-0x0000000002E36000-memory.dmp

Filesize
88KB

Download
memory/1484-12-0x0000000000000000-mapping.dmp

Download
memory/1612-18-0x0000000000000000-mapping.dmp

Download
memory/1656-9-0x0000000005050000-0x0000000005061000-memory.dmp

Filesize
68KB

Download
memory/1656-8-0x0000000004F6A000-0x0000000004F6B000-memory.dmp

Filesize
4KB

Download
memory/1656-6-0x0000000000000000-mapping.dmp

Download
memory/1680-2-0x0000000004E2A000-0x0000000004E2B000-memory.dmp

Filesize
4KB

Download
memory/1680-3-0x00000000050D0000-0x00000000050E1000-memory.dmp

Filesize
68KB

Download
memory/1716-19-0x0000000000000000-mapping.dmp

Download
memory/1856-17-0x0000000000000000-mapping.dmp

Download
memory/1952-16-0x0000000000000000-mapping.dmp

Download

pid	process
1680	0c8e4aa60d747e6cd2b7620d94aa0807.exe
1716	rundll32.exe
1716	rundll32.exe
1716	rundll32.exe
1716	rundll32.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads