hxxps://yynnlcos[.]page[.]link/tsCrXtgT31HhfEt79

Analysis

max time kernel
261s
max time network
277s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/02/2023, 09:49

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General

Target

https://yynnlcos.page.link/tsCrXtgT31HhfEt79

Score

1^/10

Malware Config

Signatures

Modifies Internet Explorer settings 1 TTPs 34 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000b1c93270cc77014fa0fd035a2aaa367c000000000200000000001066000000010000200000001003845fe88a584ce5c430c07e41cfb6d8a911cf68129266d4dc457ab5f36395000000000e8000000002000020000000487d24d7612417cf413ebe7a68fa34164027425058e68fd54f6f7515d4ebd01d2000000094561298ce91dd16d0ee1c75c23a91cf73a317b0d91b98d9ed7d1e9a5fe1007a400000004627cfd85e238bbc2dd799567b90aefa8813454798fb6bbaeee71fa0b1fc11bcb7b0a2d59adcabb34e63fca59d9763d0e52fb6b30c1d18124ab5a95bc7b3c585	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = b08e04fce13ad901	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "382531957"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{20805E91-A6D5-11ED-9C7C-660C31E8D015} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1224	iexplore.exe
532	msdt.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1224	iexplore.exe
1224	iexplore.exe
1592	IEXPLORE.EXE
1592	IEXPLORE.EXE
1592	IEXPLORE.EXE
1592	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1224 wrote to memory of 1592	1224	iexplore.exe	29
PID 1224 wrote to memory of 1592	1224	iexplore.exe	29
PID 1224 wrote to memory of 1592	1224	iexplore.exe	29
PID 1224 wrote to memory of 1592	1224	iexplore.exe	29
PID 1592 wrote to memory of 532	1592	IEXPLORE.EXE	31
PID 1592 wrote to memory of 532	1592	IEXPLORE.EXE	31
PID 1592 wrote to memory of 532	1592	IEXPLORE.EXE	31
PID 1592 wrote to memory of 532	1592	IEXPLORE.EXE	31

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://yynnlcos.page.link/tsCrXtgT31HhfEt79
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1224 CREDAT:275457 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1592
- - C:\Windows\SysWOW64\msdt.exe
    -modal 655700 -skip TRUE -path C:\Windows\diagnostics\system\networking -af C:\Users\Admin\AppData\Local\Temp\NDFE19B.tmp -ep NetworkDiagnosticsWeb
    3⤵
    - Suspicious use of FindShellTrayWindow
    PID:532

C:\Windows\SysWOW64\sdiagnhost.exe
C:\Windows\SysWOW64\sdiagnhost.exe -Embedding
1⤵
PID:1660

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
340B

MD5
0a320d7a7c77822e91d43a2d831eedf3

SHA1
f06640c78720be09b5c2f449fe19e324f830899c

SHA256
d4d0175c7472be30e4a22cedaf1d53a67efac1a8248a51eb9b2cabf4d7873385

SHA512
1423407175e9b26313f953601634ecd96bbc96efbe8b1311785dee2fdfa4d57a7301642149dc4c4b503897198c419ab816d2c384cc5233da0d6fc276d5f4db25

Download Submit
C:\Users\Admin\AppData\Local\Temp\NDFE19B.tmp

Filesize
3KB

MD5
1f3e2a24366fb6eb04cdb4eeec15197a

SHA1
5344ecb7deaa62c3711eccf1ce9a06ac8cc78c01

SHA256
4e53b210f87a837b1336bd5349bab32c69f881f06e06916d20ae9895b1de64ee

SHA512
59e141415ee1c961164a5b5341e5535b2b19b9b0edd34dc4b1153d0d74722b1a1039dfae636adec77b0b4c89ea4a25e21fc0515c5c191fb14d4de02e2bf7433e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\6N6JJ1NM.txt

Filesize
603B

MD5
b8e1aa1d255647be92aef821248e17e6

SHA1
e0d6ecdd152edfd333b10e424d566756cb687562

SHA256
03f804b0c9c9346d28288e815ded0e5044e58cbef192ae1d37fc15598aace148

SHA512
b8fb62bcacaf32613349eed9f9f7dcd2f03f18869f8b752bf2ebb5276c5ee3cad3007a170758b38f81be7baabaeebd6cc5582376863888594ddc15daf1e9793e

Download Submit
C:\Windows\TEMP\SDIAG_7cb8ddb9-536a-48ea-8f0e-6a45e651dd1f\NetworkDiagnosticsTroubleshoot.ps1

Filesize
23KB

MD5
1d192ce36953dbb7dc7ee0d04c57ad8d

SHA1
7008e759cb47bf74a4ea4cd911de158ef00ace84

SHA256
935a231924ae5d4a017b0c99d4a5f3904ef280cea4b3f727d365283e26e8a756

SHA512
e864ac74e9425a6c7f1be2bbc87df9423408e16429cb61fa1de8875356226293aa07558b2fafdd5d0597254474204f5ba181f4e96c2bc754f1f414748f80a129

Download Submit
C:\Windows\TEMP\SDIAG_7cb8ddb9-536a-48ea-8f0e-6a45e651dd1f\UtilityFunctions.ps1

Filesize
52KB

MD5
2f7c3db0c268cf1cf506fe6e8aecb8a0

SHA1
fb35af6b329d60b0ec92e24230eafc8e12b0a9f9

SHA256
886a625f71e0c35e5722423ed3aa0f5bff8d120356578ab81a64de2ab73d47f3

SHA512
322f2b1404a59ee86c492b58d56b8a6ed6ebc9b844a8c38b7bb0b0675234a3d5cfc9f1d08c38c218070e60ce949aa5322de7a2f87f952e8e653d0ca34ff0de45

Download Submit
memory/532-57-0x0000000076711000-0x0000000076713000-memory.dmp

Filesize
8KB

Download
memory/532-59-0x00000000708A1000-0x00000000708A3000-memory.dmp

Filesize
8KB

Download
memory/1660-62-0x0000000070220000-0x00000000707CB000-memory.dmp

Filesize
5.7MB

Download
memory/1660-64-0x0000000070220000-0x00000000707CB000-memory.dmp

Filesize
5.7MB

Download