hxxps://avs3hst9[.]page[.]link/muUh

Analysis

max time kernel
115s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
03-07-2023 08:55

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General

Target

https://avs3hst9.page.link/muUh

Score

5^/10

Malware Config

Signatures

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{AB163996-088A-447E-A673-26807AD08C6F}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{D5906D96-2B99-409C-B6B0-043F8ED7946E}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{469F3C21-5EC8-4214-B306-1D3E488ABA31}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{C8609D7E-21FF-491A-8796-AB8BF29C0B79}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{3D9EB2BE-1112-4D6D-A83D-95BDD745001A}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{8F48A42A-AC9B-452F-A4C8-DC5F8FB733BA}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{0C1D2530-0EBB-41BD-B6F9-BBE4A89C6500}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{5F614BC6-715D-4B3B-BF5D-32242C4CFE54}.catalogItem	svchost.exe

Modifies Internet Explorer settings 1 TTPs 43 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = b07c642c8cadd901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\MINIE	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "704315457"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31042956"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\IESettingSync	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "713224378"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb0100000003baaf03b17dd442a33931e427c360420000000002000000000010660000000100002000000007352ea5f54dfb2dc5bfbd68c1d3004e61c80d9bcd8a822a7d9a5be48835bdc2000000000e8000000002000020000000961fd6adaf9430f5325375af481c13f115ddfc2cc1151cd9e34127fc18f24438200000008f16d1b6f2d29c3333638b2569f36fc2384346e75f298dcc8376d610f1fcaa584000000064bfd5092ee4c38c74054d2d838705c84c81dcee4a25ad2791f4809f613ef7b565c7854f51a7324d179a20f85ff8ce1e57aff418fa08808614dfb4c9d3ba5dee	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 6005812c8cadd901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{5557532A-197F-11EE-910D-422BD5BB252E} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "395139493"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31042956"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31042956"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb0100000003baaf03b17dd442a33931e427c3604200000000020000000000106600000001000020000000cd106f87ce174923549cee3572211dbd54765ab1976cf22a0d6272c3574c75af000000000e80000000020000200000009f91676798f88b5706b0b53557762e74852e898535b0c4d6c0a3102fc6580ed42000000035ba51d6841b35abb57e28705a14435f55bb72a6ddfa8a44827471baa474a57140000000d84e7688195ec5b7157c93ddc1d0cb63b0372f1800932faedee0fd70fa6ac8ddf7d62938210f74021bf4a9db02067bbbb9e610a3eb8b50898cd8a1803539b67e	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000000000001000000ffffffffffffffffffffffffffffffff4d00000040000000d3040000a5020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "704315457"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000000000001000000ffffffffffffffffffffffffffffffff3e0000003e000000c4040000a3020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3259792829-1422303781-2047321929-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4124	iexplore.exe
4124	iexplore.exe

Suspicious use of SetWindowsHookEx 15 IoCs

pid	Process
4124	iexplore.exe
4124	iexplore.exe
3044	IEXPLORE.EXE
3044	IEXPLORE.EXE
3044	IEXPLORE.EXE
3044	IEXPLORE.EXE
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe
4124	iexplore.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4124 wrote to memory of 3044	4124	iexplore.exe	85
PID 4124 wrote to memory of 3044	4124	iexplore.exe	85
PID 4124 wrote to memory of 3044	4124	iexplore.exe	85

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://avs3hst9.page.link/muUh
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4124
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4124 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:3044

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
PID:3504

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\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Filesize
471B

MD5
bbd7a036bb694cf78e8d3a33ea129585

SHA1
6ca1e6f1b267de89d01dec1453f8d48aabce7d50

SHA256
c918cafa4bdd06e21d100feaf7bda57150a4004c8755aa9a9040d36a1c370206

SHA512
b21a6dd06f1ca2d9da5a19a246a489e4c2ff92124bc988b237a0b78fdabd7c2128e97ef1fc1f82c17c2d54f821b6e2740aa2c56719706b11a1a69f194d3da135

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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Filesize
404B

MD5
eca40be3ac0e3720af681effa08ddf5c

SHA1
24c37d87f7985defa03023fdccd4c118e4231934

SHA256
7b46356e78bb5f308670ad12a04b78f0a245884528373a293c2a740bbaea6a86

SHA512
b2cbaceb73ccd314ab4b99794d5343dc5b17dcc5c0eaecab2d5aec4e72dd5dd470aa757266f9f79ceff0722875123965251c5c8be08b02b0cddcbd30fdc0e6ae

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C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\1D9WK7RG\suggestions[1].en-US

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

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C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\DNCPX4JR\K2A70LGZ.htm

Filesize
6KB

MD5
82048761d3c4f286dcd97f525863e7d3

SHA1
49ba63f9b65bd4c6c624fef0dda81069e6ffc9f2

SHA256
da2c63d1a29ae7265b5dbaa032da2962c4294eb18d65b4b11db2ef2472e71b09

SHA512
d6f9d60cf9daa5373421e58e78f666152e9949aa269dcdefb061e3af976a0d763bb2ee87c84775dcc48ead227ab60013960e1d7053ee0a219a3623dbf771f38a

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C:\Users\Admin\AppData\Local\Temp\~DF7295854173233A8E.TMP

Filesize
16KB

MD5
f01d4873f4344feefa295606b8c2fc2a

SHA1
a53f6b89989c38065d59f10814e94c7b86340703

SHA256
1470a18963689e1e22228c5330f24e68d1b8a27308131d7e9d13fb9594e7a864

SHA512
d544c45cb8528161428b60d148055feb8fdd0f42de18661730e00bfab28d96979c063bd2bb9b5f65dac7a400679b97f57498a2ef07699c1b58d9fb3d3427d730

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