hxxps://github[.]com/experfreesoft/voolk/releases/download/vds/RegSvc[.]exe

Analysis

max time kernel
73s
max time network
136s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
21/12/2022, 17:32

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General

Target

https://github.com/experfreesoft/voolk/releases/download/vds/RegSvc.exe

Score

8^/10

persistence

Malware Config

Signatures

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1800	RegSvc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\RegSvc = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files\\Content.IE5\\V6CJ2G8R\\RegSvc.exe"	RegSvc.exe

Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\PhishingFilter	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\PhishingFilter\ClientSupported_MigrationTime = 70df819c6a15d901	iexplore.exe

Modifies Internet Explorer settings 1 TTPs 30 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{D4E9FF01-815D-11ED-882B-42F1C931D1AB} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "378412528"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\MINIE	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
976	iexplore.exe
976	iexplore.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
976	iexplore.exe
976	iexplore.exe
1508	IEXPLORE.EXE
1508	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 1508	976	iexplore.exe	29
PID 976 wrote to memory of 1508	976	iexplore.exe	29
PID 976 wrote to memory of 1508	976	iexplore.exe	29
PID 976 wrote to memory of 1508	976	iexplore.exe	29
PID 976 wrote to memory of 1800	976	iexplore.exe	31
PID 976 wrote to memory of 1800	976	iexplore.exe	31
PID 976 wrote to memory of 1800	976	iexplore.exe	31
PID 976 wrote to memory of 1800	976	iexplore.exe	31

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://github.com/experfreesoft/voolk/releases/download/vds/RegSvc.exe
1⤵
- Modifies Internet Explorer Phishing Filter
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:976
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:976 CREDAT:275457 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1508
- C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\V6CJ2G8R\RegSvc.exe
  "C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\V6CJ2G8R\RegSvc.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  PID:1800

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
9d51ed78fd5608cfa9dbd5c3cd72feee

SHA1
b9d3130ec210e365e2deef3fd8fb9a0f79848391

SHA256
c67c8e2929c53b079788ea316a525d360e4cc64a237459897993aeeaff62c027

SHA512
0ee7b66ca5adac2fb952e9059a2b8d70ab7c3648da3643b77d2f681cc18353ae81ddd5089a61d104a1b9718a4d0331e0c4e783736cd990a99b5e23c899c981e9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\V6CJ2G8R\RegSvc.exe

Filesize
13KB

MD5
686847d049b8af50838377d44c76897c

SHA1
594db28cdebbe70e8224d1a9ccd147434f1f482e

SHA256
1e015917df61fe296c400ed4d7a18facdc0793a03fe2afeeadf784be6416fdf9

SHA512
73e461b4857c4fea9a24ace0f05c7f429116c7329a7ec241eed567d1c33638d9b0b65f4cd4cb1e5044e0d1acadf4c454fe10f9514a2644a977db4fe7681bbd6c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\V6CJ2G8R\RegSvc.exe.n06m7wk.partial

Filesize
13KB

MD5
686847d049b8af50838377d44c76897c

SHA1
594db28cdebbe70e8224d1a9ccd147434f1f482e

SHA256
1e015917df61fe296c400ed4d7a18facdc0793a03fe2afeeadf784be6416fdf9

SHA512
73e461b4857c4fea9a24ace0f05c7f429116c7329a7ec241eed567d1c33638d9b0b65f4cd4cb1e5044e0d1acadf4c454fe10f9514a2644a977db4fe7681bbd6c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\GQV3JWA1.txt

Filesize
608B

MD5
50d83f707c13ba2967df08369ce8da3a

SHA1
8c6783552a7af33b31b61f42a7303b900099e6a1

SHA256
5e50839ad84f23ef9b9b7f3a388999ed2711cceaad4f9ade0a24b612915bddb8

SHA512
f76c1dd66d50bbd9d6a6eff1e72b39c725aeb8495e0fdd908e1d88838f561f1802b239e9250b585aa44d6999f1404eb9df3a963ca6be7e99824b9c2ea70613df

Download Submit
memory/1800-57-0x0000000000E90000-0x0000000000E9A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads