smokeloader | eb578a996987c1bc8ef77f0c5f204a115faea3a5d88190fc076dbbc9cb3d98b0

Analysis

max time kernel
151s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
29-12-2020 07:37

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General

Target

15521d212dddf310778ca67d98a298a3.exe
Size

137KB
MD5

15521d212dddf310778ca67d98a298a3
SHA1

7e30c1927a21808e6527ad370c799e986b5f3176
SHA256

eb578a996987c1bc8ef77f0c5f204a115faea3a5d88190fc076dbbc9cb3d98b0
SHA512

b85c65a79538b6f03806d536c98f776e2d0ace55c97a7f9ba74f3e1d1c52e5cee09726520fd92a62d8ef872598f092310166e448358fdd98ebe01b2c72658f7d

Score

10^/10

smokeloader backdoor trojan upx

Malware Config

Extracted

Family

smokeloader

Version

2020

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 2 IoCs

Processes:

E9F2.exe4EDC.exe

pid process

476 E9F2.exe
2008 4EDC.exe

pid	process
476	E9F2.exe
2008	4EDC.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\E9F2.exe	upx
C:\Users\Admin\AppData\Local\Temp\E9F2.exe	upx
C:\Users\Admin\AppData\Local\Temp\4EDC.exe	upx

Deletes itself 1 IoCs

Processes:

pid process

1264
Loads dropped DLL 5 IoCs

Processes:

15521d212dddf310778ca67d98a298a3.exerundll32.exe

pid process

372 15521d212dddf310778ca67d98a298a3.exe
1568 rundll32.exe
1568 rundll32.exe
1568 rundll32.exe
1568 rundll32.exe

pid	process
1264

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:

15521d212dddf310778ca67d98a298a3.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	15521d212dddf310778ca67d98a298a3.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	15521d212dddf310778ca67d98a298a3.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	15521d212dddf310778ca67d98a298a3.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1120 timeout.exe

pid	process
1120	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

4EDC.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	4EDC.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	4EDC.exe

Suspicious behavior: EnumeratesProcesses 774 IoCs

Processes:

15521d212dddf310778ca67d98a298a3.exe

pid	process
372	15521d212dddf310778ca67d98a298a3.exe
372	15521d212dddf310778ca67d98a298a3.exe
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264
1264

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

15521d212dddf310778ca67d98a298a3.exe

pid process

372 15521d212dddf310778ca67d98a298a3.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

pid process

1264
1264
1264
1264
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

pid process

1264
1264
1264
1264

pid	process
1264
1264
1264
1264

pid	process
1264
1264
1264
1264

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

E9F2.execmd.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1264 wrote to memory of 476	1264		E9F2.exe
PID 1264 wrote to memory of 476	1264		E9F2.exe
PID 1264 wrote to memory of 476	1264		E9F2.exe
PID 1264 wrote to memory of 476	1264		E9F2.exe
PID 476 wrote to memory of 976	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 976	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 976	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 976	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1064	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1064	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1064	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1064	476	E9F2.exe	cmd.exe
PID 1064 wrote to memory of 1120	1064	cmd.exe	timeout.exe
PID 1064 wrote to memory of 1120	1064	cmd.exe	timeout.exe
PID 1064 wrote to memory of 1120	1064	cmd.exe	timeout.exe
PID 1064 wrote to memory of 1120	1064	cmd.exe	timeout.exe
PID 976 wrote to memory of 744	976	cmd.exe	reg.exe
PID 976 wrote to memory of 744	976	cmd.exe	reg.exe
PID 976 wrote to memory of 744	976	cmd.exe	reg.exe
PID 976 wrote to memory of 744	976	cmd.exe	reg.exe
PID 476 wrote to memory of 1744	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1744	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1744	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1744	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1676	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1676	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1676	476	E9F2.exe	cmd.exe
PID 476 wrote to memory of 1676	476	E9F2.exe	cmd.exe
PID 1744 wrote to memory of 1592	1744	cmd.exe	reg.exe
PID 1744 wrote to memory of 1592	1744	cmd.exe	reg.exe
PID 1744 wrote to memory of 1592	1744	cmd.exe	reg.exe
PID 1744 wrote to memory of 1592	1744	cmd.exe	reg.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1676 wrote to memory of 1568	1676	cmd.exe	rundll32.exe
PID 1264 wrote to memory of 2008	1264		4EDC.exe
PID 1264 wrote to memory of 2008	1264		4EDC.exe
PID 1264 wrote to memory of 2008	1264		4EDC.exe
PID 1264 wrote to memory of 2008	1264		4EDC.exe

C:\Users\Admin\AppData\Local\Temp\15521d212dddf310778ca67d98a298a3.exe
"C:\Users\Admin\AppData\Local\Temp\15521d212dddf310778ca67d98a298a3.exe"
1⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:372

C:\Users\Admin\AppData\Local\Temp\E9F2.exe
C:\Users\Admin\AppData\Local\Temp\E9F2.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:476

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\RDMchpYRtFrZNWaPGihu /f
2⤵
- Suspicious use of WriteProcessMemory
PID:976

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\RDMchpYRtFrZNWaPGihu /f
3⤵
PID:744

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\RDMchpYRtFrZNWaPGihu\nethelper.exe /F
2⤵
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\SysWOW64\timeout.exe
timeout /t 60
3⤵
- Delays execution with timeout.exe
PID:1120

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\RDMchpYRtFrZNWaPGihu\nethelper.dll /f && EXIT 0
2⤵
- Suspicious use of WriteProcessMemory
PID:1744

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\RDMchpYRtFrZNWaPGihu\nethelper.dll /f
3⤵
PID:1592

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C rundll32.exe C:\ProgramData\NetHelper\Cache\RDMchpYRtFrZNWaPGihu\nethelper.dll, UserModeExport
2⤵
- Suspicious use of WriteProcessMemory
PID:1676

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\ProgramData\NetHelper\Cache\RDMchpYRtFrZNWaPGihu\nethelper.dll, UserModeExport
3⤵
- Loads dropped DLL
PID:1568

C:\Users\Admin\AppData\Local\Temp\4EDC.exe
C:\Users\Admin\AppData\Local\Temp\4EDC.exe
1⤵
- Executes dropped EXE
- Modifies system certificate store
PID:2008

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

T1130

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

Replay Monitor

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Downloads

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
C:\Users\Admin\AppData\Local\Temp\4EDC.exe
MD5
3c362d50ee8dda5655d201c1892e6ac2

SHA1
c61e83407acab961d7094b5f20c89501d4d94651

SHA256
ce8f6248e942286fa329f634581603ceea496cd968df33c7241745b41faac6ae

SHA512
274372ddf532c76fd23b2122d9ac108525289da3153d03dbb23373ca4b350eaa2f7e7241948e79e39ad146afc529a87048b702765e39a04691253c6bd5c360ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\E9F2.exe
MD5
57a9c6d1f80eec2792d26d5903a9228b

SHA1
15455de7cb21d125651d9cf88b23af2953bfa96f

SHA256
b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

SHA512
0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

Download Submit
C:\Users\Admin\AppData\Local\Temp\E9F2.exe
MD5
57a9c6d1f80eec2792d26d5903a9228b

SHA1
15455de7cb21d125651d9cf88b23af2953bfa96f

SHA256
b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

SHA512
0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
\ProgramData\NetHelper\Cache\RDMchpYRtFrZNWaPGihu\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/372-3-0x0000000005040000-0x0000000005051000-memory.dmp

Filesize
68KB

Download
memory/372-2-0x0000000004F5A000-0x0000000004F5B000-memory.dmp

Filesize
4KB

Download
memory/476-8-0x0000000004E7A000-0x0000000004E7B000-memory.dmp

Filesize
4KB

Download
memory/476-6-0x0000000000000000-mapping.dmp

Download
memory/476-9-0x0000000005100000-0x0000000005111000-memory.dmp

Filesize
68KB

Download
memory/740-15-0x000007FEF6350000-0x000007FEF65CA000-memory.dmp

Filesize
2.5MB

Download
memory/744-14-0x0000000000000000-mapping.dmp

Download
memory/976-10-0x0000000000000000-mapping.dmp

Download
memory/1064-12-0x0000000000000000-mapping.dmp

Download
memory/1120-13-0x0000000000000000-mapping.dmp

Download
memory/1264-5-0x0000000002C60000-0x0000000002C76000-memory.dmp

Filesize
88KB

Download
memory/1568-19-0x0000000000000000-mapping.dmp

Download
memory/1592-18-0x0000000000000000-mapping.dmp

Download
memory/1676-17-0x0000000000000000-mapping.dmp

Download
memory/1744-16-0x0000000000000000-mapping.dmp

Download
memory/2008-25-0x0000000000000000-mapping.dmp

Download
memory/2008-27-0x0000000004EFA000-0x0000000004EFB000-memory.dmp

Filesize
4KB

Download
memory/2008-28-0x0000000004FE0000-0x0000000004FF1000-memory.dmp

Filesize
68KB

Download

pid	process
372	15521d212dddf310778ca67d98a298a3.exe
1568	rundll32.exe
1568	rundll32.exe
1568	rundll32.exe
1568	rundll32.exe