hxxp://ctldl[.]windowsupdate[.]com

Analysis

max time kernel
75s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
03/04/2023, 21:36

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General

Target

http://ctldl.windowsupdate.com

Score

1^/10

Malware Config

Signatures

Modifies Internet Explorer settings 1 TTPs 51 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\DOMStorage\Total	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com\Total = "0"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000675316f82fdac74aa8f3bd7995064a97000000000200000000001066000000010000200000000c6d3fc8574724b950d4bb78c9b4e7aa2cecfe75d30bd5044fa1f22a6efbc9e4000000000e80000000020000200000001bab84f736a747a09f2e3e309a0455303161276d0b9e4eb6d12dae6a7922e195200000009ab0c74b9837b35a354003ebdb2ac1c9196ac62d9be523c9cdb63aba903f736240000000f1a9fbb09d96c831107bb83977ab3311e7db1e88beba5903caf28fd6f0930af9267ad8e49997632b15d41a8b6ef3c4908c7a9f7186513baefdd1b410eae3a5ad	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = d05157738b66d901	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = d06524748b66d901	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 50d404788b66d901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\IESettingSync	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31024779"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31024779"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "387332651"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000675316f82fdac74aa8f3bd7995064a9700000000020000000000106600000001000020000000fe158d5d67c7896e5faa70e005ad99ec832cf1dd9cbc5a082514f449a850f589000000000e80000000020000200000009df7af189cc79b1c2307ecccaa8e3601be36e94270966edcd8c76fd7a55e26d020000000607be6db6ea25bc2ddeb86dea8db096cecd1f113e0feab52c1892100e2544f7c40000000497885ae3f61b2d5d6be4e91897e9a6b8d8a3ca159347e26e51b0b3385ec71d40466ca0525f9434cbf67b833ccb28a1cb47475ffecbac7612652f8136be04aed	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\DOMStorage\microsoft.com	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\support.microsoft.com\ = "124"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\Total\ = "0"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{9A70AB79-D27E-11ED-ABF7-FA48AF8140A7} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com\Total = "124"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\DOMStorage\support.microsoft.com	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com\NumberOfSubdomains = "1"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000675316f82fdac74aa8f3bd7995064a9700000000020000000000106600000001000020000000b079aa3c948c8f656b345a56fde8398164507f3356f768291f9cc809064394fb000000000e800000000200002000000025dce6e204a56dd5708d5c31fa739e749b2ecf0c562450088805c220469d4d7020000000ea50dc7a33cb97153207b8fd27ff891a35e2a5cc2c86c05caa7616e9f9408867400000007f7d4a12aef7789e3a77da55543f39a6a4ce2463cb73627fa1bcf59a3512acf438e10199dd1f65ffc01699e1b905fcf1650519215d6eefb5e8550a28865ad6d4	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "1928545363"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "1928545363"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\Total\ = "124"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\support.microsoft.com\ = "0"	IEXPLORE.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1452	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1452	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1452	iexplore.exe
1452	iexplore.exe
5064	IEXPLORE.EXE
5064	IEXPLORE.EXE
5064	IEXPLORE.EXE
5064	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 5064	1452	iexplore.exe	83
PID 1452 wrote to memory of 5064	1452	iexplore.exe	83
PID 1452 wrote to memory of 5064	1452	iexplore.exe	83

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" http://ctldl.windowsupdate.com
1⤵
- Modifies Internet Explorer settings
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1452 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:5064

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\Content\6BADA8974A10C4BD62CC921D13E43B18_1DC6D7385EA816C957BA2B715AC5C442

Filesize
1KB

MD5
dde292d6a9acb9155b3d3114493a9a51

SHA1
81e89a5e56696093366c1c632d62d186a477a6ee

SHA256
46ab8693f1b782c32ae9eced71370e28f41576039edef747626103f1d6e63d97

SHA512
6ccdfcfce0c5c6ad5a0979ed61e9a05ebf1fa53690fa4be7a053c785c05eb4f0383906562189308703608f7073a22c768a553b948ea0491c841b8dd933a03496

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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\6BADA8974A10C4BD62CC921D13E43B18_1DC6D7385EA816C957BA2B715AC5C442

Filesize
446B

MD5
d33a4331360ce9fe9dce310198f23918

SHA1
0a5e76189ad56985a6f31c6ee73ba81c372856c1

SHA256
4483f5726853bcb42a54de3434a83ad715aaad93baf7c57b68033a07a05ef5c3

SHA512
1a8b0c8d0322a613610be8b6d5d51b6f4ecd0a184542cb41028c4bf1e9697cbda429360de43418ac65f155be324e25bb6046b60a1e7844c4a380cf8fa58b77b3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\DOMStore\9RGNQIWG\support.microsoft[1].xml

Filesize
17B

MD5
3ff4d575d1d04c3b54f67a6310f2fc95

SHA1
1308937c1a46e6c331d5456bcd4b2182dc444040

SHA256
021a5868b6c9e8beba07848ba30586c693f87ac02ee2ccaa0f26b7163c0c6b44

SHA512
2b26501c4bf86ed66e941735c49ac445d683ad49ed94c5d87cc96228081ae2c8f4a8f44a2a5276b9f4b0962decfce6b9eeee38e42262ce8d865d5df0df7ec3d6

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C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\DOMStore\9RGNQIWG\support.microsoft[1].xml

Filesize
17B

MD5
3ff4d575d1d04c3b54f67a6310f2fc95

SHA1
1308937c1a46e6c331d5456bcd4b2182dc444040

SHA256
021a5868b6c9e8beba07848ba30586c693f87ac02ee2ccaa0f26b7163c0c6b44

SHA512
2b26501c4bf86ed66e941735c49ac445d683ad49ed94c5d87cc96228081ae2c8f4a8f44a2a5276b9f4b0962decfce6b9eeee38e42262ce8d865d5df0df7ec3d6

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\dcpq11e\imagestore.dat

Filesize
771B

MD5
d730e8396f49b5787db00a895b1794b9

SHA1
0c3f14d69a66ff955545ae5b52bcba245733cab0

SHA256
0234064c50cb9b64b1fda65f36153fe79e6df3fbf716b183a8f2d8555f07f52d

SHA512
2ffbf6130e88560d6738b6fc7bc0ccb11e74ba1306247e142b09ea2ede9470d4a22d6712a98bed7ec9f6293a3ffe221e57726bceb606c90c4421db3b2cc55164

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\4HAJQ22Y\OffSMDL2.4.50[1].woff

Filesize
43KB

MD5
4c6c928daf19e2a06faf12bd2f002d2e

SHA1
027d4709db809d9e9b2627b74a152aec29066ee8

SHA256
2c9728c235211d8956826af42d99936b409536e6027e9162835731d5b005d462

SHA512
62445364d9696d1ffa4bacb49b6d04d4d2415d3145b628885d48348c233a11fa336c5de8133564c541d73152950b33a3661f190d3f86a326ceff13cb0d52005e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\4HAJQ22Y\SupMDL2_v4_69[1].woff

Filesize
33KB

MD5
c6de87ee555ba9c32f8b95b2253963f6

SHA1
4f1e0fc053f1bd47bf515155405e15dba3f07a79

SHA256
736cbd05debaadea59f6eda99c3d8f7a7c586ad70a4a342b14ba8eb11a95a480

SHA512
012c96fcd366d76d33154cb9a3cd227c77252969ca1c0785044bc59dfff190dcba34bde9b230cef57675f650845ceaa3167561796142c34812af8dc73097ca68

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\5AN3FZ97\suggestions[1].en-US

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\LZ0AI98S\favicon-32x32[1].png

Filesize
631B

MD5
fb2ed9313c602f40b7a2762acc15ff89

SHA1
8a390d07a8401d40cbc1a16d873911fa4cb463f5

SHA256
b241d02fab4b17291af37993eb249f9303eb5897610abafac4c9f6aa6a878369

SHA512
9cbcf5c7b8409494f6d543434ecaff42de8a2d0632a17931062d7d1cc130d43e61162eedb0965b545e65e0687ded4d4b51e29631568af34b157a7d02a3852508

Download Submit