smokeloader | 8287906a9a9338d4bc89276bf8086347d32120cf3a5075e16d105d610c3e4da5

Analysis

max time kernel
152s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
29-12-2020 07:30

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General

Target

f332d7182864d06ae5a53eddcebdd14b.exe
Size

136KB
MD5

f332d7182864d06ae5a53eddcebdd14b
SHA1

259fc379b4653aa6bde238c674c4f7b699e186e9
SHA256

8287906a9a9338d4bc89276bf8086347d32120cf3a5075e16d105d610c3e4da5
SHA512

18ed855fd824cba69205d643232e3c9341996cfe06105cbe655dcdf56809214ad54de06ccdadd1592599ed64d8d6d49baeb39965bf0fe2b5bc4eeee2683f1b28

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:

27FA.exe87C7.exe

pid process

1168 27FA.exe
1388 87C7.exe

pid	process
1168	27FA.exe
1388	87C7.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\27FA.exe	upx
C:\Users\Admin\AppData\Local\Temp\27FA.exe	upx
C:\Users\Admin\AppData\Local\Temp\87C7.exe	upx

Deletes itself 1 IoCs

Processes:

pid process

1220
Loads dropped DLL 5 IoCs

Processes:

f332d7182864d06ae5a53eddcebdd14b.exerundll32.exe

pid process

1876 f332d7182864d06ae5a53eddcebdd14b.exe
1604 rundll32.exe
1604 rundll32.exe
1604 rundll32.exe
1604 rundll32.exe

pid	process
1220

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:

f332d7182864d06ae5a53eddcebdd14b.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	f332d7182864d06ae5a53eddcebdd14b.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	f332d7182864d06ae5a53eddcebdd14b.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	f332d7182864d06ae5a53eddcebdd14b.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

428 timeout.exe

pid	process
428	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

87C7.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	87C7.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	87C7.exe

Suspicious behavior: EnumeratesProcesses 713 IoCs

Processes:

f332d7182864d06ae5a53eddcebdd14b.exe

pid	process
1876	f332d7182864d06ae5a53eddcebdd14b.exe
1876	f332d7182864d06ae5a53eddcebdd14b.exe
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220
1220

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

f332d7182864d06ae5a53eddcebdd14b.exe

pid process

1876 f332d7182864d06ae5a53eddcebdd14b.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

pid process

1220
1220
1220
1220
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

pid process

1220
1220
1220
1220

pid	process
1220
1220
1220
1220

pid	process
1220
1220
1220
1220

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

27FA.execmd.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1220 wrote to memory of 1168	1220		27FA.exe
PID 1220 wrote to memory of 1168	1220		27FA.exe
PID 1220 wrote to memory of 1168	1220		27FA.exe
PID 1220 wrote to memory of 1168	1220		27FA.exe
PID 1168 wrote to memory of 1660	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1660	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1660	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1660	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1524	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1524	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1524	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1524	1168	27FA.exe	cmd.exe
PID 1660 wrote to memory of 1860	1660	cmd.exe	reg.exe
PID 1660 wrote to memory of 1860	1660	cmd.exe	reg.exe
PID 1660 wrote to memory of 1860	1660	cmd.exe	reg.exe
PID 1660 wrote to memory of 1860	1660	cmd.exe	reg.exe
PID 1524 wrote to memory of 428	1524	cmd.exe	timeout.exe
PID 1524 wrote to memory of 428	1524	cmd.exe	timeout.exe
PID 1524 wrote to memory of 428	1524	cmd.exe	timeout.exe
PID 1524 wrote to memory of 428	1524	cmd.exe	timeout.exe
PID 1168 wrote to memory of 1832	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1832	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1832	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1832	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1620	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1620	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1620	1168	27FA.exe	cmd.exe
PID 1168 wrote to memory of 1620	1168	27FA.exe	cmd.exe
PID 1832 wrote to memory of 1072	1832	cmd.exe	reg.exe
PID 1832 wrote to memory of 1072	1832	cmd.exe	reg.exe
PID 1832 wrote to memory of 1072	1832	cmd.exe	reg.exe
PID 1832 wrote to memory of 1072	1832	cmd.exe	reg.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1620 wrote to memory of 1604	1620	cmd.exe	rundll32.exe
PID 1220 wrote to memory of 1388	1220		87C7.exe
PID 1220 wrote to memory of 1388	1220		87C7.exe
PID 1220 wrote to memory of 1388	1220		87C7.exe
PID 1220 wrote to memory of 1388	1220		87C7.exe

C:\Users\Admin\AppData\Local\Temp\f332d7182864d06ae5a53eddcebdd14b.exe
"C:\Users\Admin\AppData\Local\Temp\f332d7182864d06ae5a53eddcebdd14b.exe"
1⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1876

C:\Users\Admin\AppData\Local\Temp\27FA.exe
C:\Users\Admin\AppData\Local\Temp\27FA.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1168

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\hVtlchCAKqmWwPCuPeQl /f
2⤵
- Suspicious use of WriteProcessMemory
PID:1660

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\hVtlchCAKqmWwPCuPeQl /f
3⤵
PID:1860

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\hVtlchCAKqmWwPCuPeQl\nethelper.exe /F
2⤵
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\timeout.exe
timeout /t 60
3⤵
- Delays execution with timeout.exe
PID:428

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\hVtlchCAKqmWwPCuPeQl\nethelper.dll /f && EXIT 0
2⤵
- Suspicious use of WriteProcessMemory
PID:1832

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\hVtlchCAKqmWwPCuPeQl\nethelper.dll /f
3⤵
PID:1072

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C rundll32.exe C:\ProgramData\NetHelper\Cache\hVtlchCAKqmWwPCuPeQl\nethelper.dll, UserModeExport
2⤵
- Suspicious use of WriteProcessMemory
PID:1620

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\ProgramData\NetHelper\Cache\hVtlchCAKqmWwPCuPeQl\nethelper.dll, UserModeExport
3⤵
- Loads dropped DLL
PID:1604

C:\Users\Admin\AppData\Local\Temp\87C7.exe
C:\Users\Admin\AppData\Local\Temp\87C7.exe
1⤵
- Executes dropped EXE
- Modifies system certificate store
PID:1388

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\hVtlchCAKqmWwPCuPeQl\nethelper.dll
MD5
e835f27f6b6a2b0af42873ce2cc6cc07

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
C:\Users\Admin\AppData\Local\Temp\27FA.exe
MD5
57a9c6d1f80eec2792d26d5903a9228b

SHA1
15455de7cb21d125651d9cf88b23af2953bfa96f

SHA256
b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

SHA512
0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

Download Submit
C:\Users\Admin\AppData\Local\Temp\27FA.exe
MD5
57a9c6d1f80eec2792d26d5903a9228b

SHA1
15455de7cb21d125651d9cf88b23af2953bfa96f

SHA256
b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

SHA512
0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

Download Submit
C:\Users\Admin\AppData\Local\Temp\87C7.exe
MD5
3c362d50ee8dda5655d201c1892e6ac2

SHA1
c61e83407acab961d7094b5f20c89501d4d94651

SHA256
ce8f6248e942286fa329f634581603ceea496cd968df33c7241745b41faac6ae

SHA512
274372ddf532c76fd23b2122d9ac108525289da3153d03dbb23373ca4b350eaa2f7e7241948e79e39ad146afc529a87048b702765e39a04691253c6bd5c360ae

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

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

SHA1
6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

SHA256
84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

SHA512
c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

Download Submit
\ProgramData\NetHelper\Cache\hVtlchCAKqmWwPCuPeQl\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/428-14-0x0000000000000000-mapping.dmp

Download
memory/1020-15-0x000007FEF7810000-0x000007FEF7A8A000-memory.dmp

Filesize
2.5MB

Download
memory/1072-18-0x0000000000000000-mapping.dmp

Download
memory/1168-9-0x00000000051B0000-0x00000000051C1000-memory.dmp

Filesize
68KB

Download
memory/1168-8-0x0000000004F2A000-0x0000000004F2B000-memory.dmp

Filesize
4KB

Download
memory/1168-6-0x0000000000000000-mapping.dmp

Download
memory/1220-5-0x0000000002EB0000-0x0000000002EC6000-memory.dmp

Filesize
88KB

Download
memory/1388-28-0x0000000005020000-0x0000000005031000-memory.dmp

Filesize
68KB

Download
memory/1388-27-0x0000000004F3A000-0x0000000004F3B000-memory.dmp

Filesize
4KB

Download
memory/1388-25-0x0000000000000000-mapping.dmp

Download
memory/1524-12-0x0000000000000000-mapping.dmp

Download
memory/1604-19-0x0000000000000000-mapping.dmp

Download
memory/1620-17-0x0000000000000000-mapping.dmp

Download
memory/1660-10-0x0000000000000000-mapping.dmp

Download
memory/1832-16-0x0000000000000000-mapping.dmp

Download
memory/1860-13-0x0000000000000000-mapping.dmp

Download
memory/1876-3-0x00000000050B0000-0x00000000050C1000-memory.dmp

Filesize
68KB

Download
memory/1876-2-0x0000000004E2A000-0x0000000004E2B000-memory.dmp

Filesize
4KB

Download

pid	process
1876	f332d7182864d06ae5a53eddcebdd14b.exe
1604	rundll32.exe
1604	rundll32.exe
1604	rundll32.exe
1604	rundll32.exe