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

Analysis

max time kernel
191s
max time network
219s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31-03-2023 14:29

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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
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\DOMStorage\Total	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\Total\ = "124"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\Total\ = "0"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = e03b9385f063d901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31024112"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{9EF782AB-CFE3-11ED-B7D7-FE76446D24E5} = "0"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 5023547cf063d901	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 0047d180f063d901	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2165428523"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com\NumberOfSubdomains = "1"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\support.microsoft.com\ = "124"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\support.microsoft.com\ = "0"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com\Total = "0"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\IESettingSync	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000c884d0db6b01394f84d012a5eedc1d2d0000000002000000000010660000000100002000000014d80fcacbc81109760926e39b9176470c1fc3ef565f3320fc91e59db38094ac000000000e8000000002000020000000bb96fd709e79dc59049c0c75e24915d84a76579d04938f73a67df3ff6272d74a200000007f67afb38f6c59627aa7bb791099c407911b926b20d16c503004d7c37845cf7240000000113cf78ee9f8259d81d583f51ef5708df55eeb21b580ce40826a8790f4359c6f9ed997f8fb8120a06f91019842cc9b98e260c8e3680f805899dc3ec661090d6d	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31024112"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2165428523"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\DOMStorage\microsoft.com	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000c884d0db6b01394f84d012a5eedc1d2d0000000002000000000010660000000100002000000062bbe505275b124f19cf25b98d14a4076700c1650a86446dd28576e34572e5c1000000000e800000000200002000000037102ff1ce955ef4fc7746fadb988274af6a5fbe8cdb53704b23f3b1064a03c5200000003b801158366f668c1fc464bad0b5d491f591c9f2bc47d8ff3ea24b353b25b9c2400000004c142f69c4399be14a7d979e551879742959ed7ec18a20b380e71e427695156d3ceb66acd4c7b9e8eab55bbe31af15d070aea66d3bb0155985209941e7a1baa2	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\DOMStorage\support.microsoft.com	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\microsoft.com\Total = "124"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000c884d0db6b01394f84d012a5eedc1d2d00000000020000000000106600000001000020000000a8e8b567e00bc267f044901957a64807c04291f3f1b564b8cdd24fd30e9c4cd2000000000e80000000020000200000005f29568bc954a02b2368aa830e8c62a228d8f8b38514098a8f65a31467645dcf20000000bb3f054f2eb89c9b393dbb81ca14612304e95bb295765926baeb04514f245c05400000006eaf5e9de654b242a10a5400c96c08ecf0c7d0fb3fd15698adb935032d6690b306bf32a447060acfb5735c17f58fdd1b0da703c97f2f4ea2ae8337b9533f9b4a	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "387046200"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4120	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
4120	iexplore.exe
4120	iexplore.exe
2152	IEXPLORE.EXE
2152	IEXPLORE.EXE
2152	IEXPLORE.EXE
2152	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 2152	4120	iexplore.exe	82
PID 4120 wrote to memory of 2152	4120	iexplore.exe	82
PID 4120 wrote to memory of 2152	4120	iexplore.exe	82

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" http://ctldl.windowsupdate.com
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4120 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:2152

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
8461a037b38246996c5f98a64b5fd918

SHA1
db8bf194f154ebcdedf9b0a8a9adc62d02dff008

SHA256
c85675b72791f932ebe52b51bc13dcb761a469b1fbde881c6c4ef6ba93a1b36f

SHA512
1ed13f73bd0e64d5609764ee65d642d3c9b658a117616e8e3ed4149b546695183f10befb51f24d471f134ddd02fd3068ea88cf949fde9c8be19bfaddff4a3880

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

Filesize
446B

MD5
53d616d3198c8839cc894142b58ce1f5

SHA1
61c991fe40cf869ffb0c2ead66b220228702b77f

SHA256
de69df5fb51637244659bd5aed11cc5379a9001f8401cbcd522292f91b012ef1

SHA512
4f68ca8f647d8347bd56cd6ceba9ebcf0de3c7e932e1fd6f38788e594b15239e0ef156dddefdb87ed424882aa2bc8303854b464ae76ebdde8e6de44cd98edf7a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\DOMStore\7HUK25JI\support.microsoft[1].xml

Filesize
13B

MD5
c1ddea3ef6bbef3e7060a1a9ad89e4c5

SHA1
35e3224fcbd3e1af306f2b6a2c6bbea9b0867966

SHA256
b71e4d17274636b97179ba2d97c742735b6510eb54f22893d3a2daff2ceb28db

SHA512
6be8cec7c862afae5b37aa32dc5bb45912881a3276606da41bf808a4ef92c318b355e616bf45a257b995520d72b7c08752c0be445dceade5cf79f73480910fed

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\ver7470.tmp

Filesize
15KB

MD5
1a545d0052b581fbb2ab4c52133846bc

SHA1
62f3266a9b9925cd6d98658b92adec673cbe3dd3

SHA256
557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

SHA512
bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d

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C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\9afmek3\imagestore.dat

Filesize
771B

MD5
b49659e12bd35b05af566d08ea378f7d

SHA1
0f2f6d27264fdb13633c7e3c7ca45e3a7c5e9017

SHA256
14c7c8465c45d2c5b0115890da3246ad8be6dcba61544b3bc4d4d3590b922333

SHA512
81ce168f0c38e21f2126f400bdcd55e25bf33e8f873f4a74a262edb370ceb5b7be0c450b411fbc19ff06d51eee5c67d2507d6088023a9533e6097163a12d28b8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\0P80TOLA\SupMDL2_v4_69[2].woff

Filesize
33KB

MD5
c6de87ee555ba9c32f8b95b2253963f6

SHA1
4f1e0fc053f1bd47bf515155405e15dba3f07a79

SHA256
736cbd05debaadea59f6eda99c3d8f7a7c586ad70a4a342b14ba8eb11a95a480

SHA512
012c96fcd366d76d33154cb9a3cd227c77252969ca1c0785044bc59dfff190dcba34bde9b230cef57675f650845ceaa3167561796142c34812af8dc73097ca68

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\0P80TOLA\favicon-32x32[1].png

Filesize
631B

MD5
fb2ed9313c602f40b7a2762acc15ff89

SHA1
8a390d07a8401d40cbc1a16d873911fa4cb463f5

SHA256
b241d02fab4b17291af37993eb249f9303eb5897610abafac4c9f6aa6a878369

SHA512
9cbcf5c7b8409494f6d543434ecaff42de8a2d0632a17931062d7d1cc130d43e61162eedb0965b545e65e0687ded4d4b51e29631568af34b157a7d02a3852508

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\DKFP9JBL\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\G1ORIWBN\suggestions[1].en-US

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit