hxxp://4[.]au[.]download[.]windowsupdate[.]com/d/msdownload/update/software/defu/2023/01/am_delta_patch_1[.]381[.]2084[.]0_a0c4dd331e1b07fe8efc3df418a0b614a789f200[.]exe

Analysis

max time kernel
72s
max time network
138s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
12/01/2023, 16:04

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General

Target

http://4.au.download.windowsupdate.com/d/msdownload/update/software/defu/2023/01/am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe

Score

8^/10

Malware Config

Signatures

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
768	am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe

Loads dropped DLL 1 IoCs

pid	Process
2040	iexplore.exe

Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\PhishingFilter	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\PhishingFilter\ClientSupported_MigrationTime = a0ae2fe7a726d901	iexplore.exe

Modifies Internet Explorer settings 1 TTPs 36 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\Zoom	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "380308023"	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\Toolbar	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\{201CD4E1-929B-11ED-8413-C22E595EE768} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\MINIE	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\IntelliForms	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	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\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	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\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	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 (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	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\MFV = 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	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\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000000d200be11edef240bccee7bca0f6220b00000000020000000000106600000001000020000000a8fd3562dbddfcdf10470ecac5dab9b4bebfe3859838278a639b7b02eac5c21d000000000e80000000020000200000000a1f904c63d599a8adc28ce2a812a4b00bd84c1fd4fb58fcb490a7000ca97ce82000000038e2e3854712f2fb52dea06b9642b2a14b7217c2fb060e4bef9fb8ad1fc8e60f40000000ef2a806a75125d2ccb246b918ffec014ea5c76010dcfd1ecc37cbbaeb23a6011be9acbdf26ce1f9e40b889edf36d51342900ee51369524e0933996933a291a9e	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = a01f43f9a726d901	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
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\TabbedBrowsing	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	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\GPU	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\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500"	iexplore.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
768	am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2040	iexplore.exe
2040	iexplore.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2040	iexplore.exe
2040	iexplore.exe
1640	IEXPLORE.EXE
1640	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 1640	2040	iexplore.exe	29
PID 2040 wrote to memory of 1640	2040	iexplore.exe	29
PID 2040 wrote to memory of 1640	2040	iexplore.exe	29
PID 2040 wrote to memory of 1640	2040	iexplore.exe	29
PID 2040 wrote to memory of 768	2040	iexplore.exe	31
PID 2040 wrote to memory of 768	2040	iexplore.exe	31
PID 2040 wrote to memory of 768	2040	iexplore.exe	31

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" http://4.au.download.windowsupdate.com/d/msdownload/update/software/defu/2023/01/am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe
1⤵
- Loads dropped DLL
- Modifies Internet Explorer Phishing Filter
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2040 CREDAT:275457 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1640
- C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I9NA5QYV\am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe
  "C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I9NA5QYV\am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:768

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\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I9NA5QYV\am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe

Filesize
1.5MB

MD5
d622e03d8373ac278bed709b0096a7bf

SHA1
a0c4dd331e1b07fe8efc3df418a0b614a789f200

SHA256
8921d94e01df6b7dc778ea13a48ef19949b59459566c36e47a401c3418622cb0

SHA512
3e754768010e119d49836d9dc07b018f5ad764971f0924a38abc6363f137838aab0e1dda80a83c792583da1a0884a7fc5583c9024b01f5b1cdd0e5567c8f016c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I9NA5QYV\am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe.r3gejr1.partial

Filesize
1.5MB

MD5
d622e03d8373ac278bed709b0096a7bf

SHA1
a0c4dd331e1b07fe8efc3df418a0b614a789f200

SHA256
8921d94e01df6b7dc778ea13a48ef19949b59459566c36e47a401c3418622cb0

SHA512
3e754768010e119d49836d9dc07b018f5ad764971f0924a38abc6363f137838aab0e1dda80a83c792583da1a0884a7fc5583c9024b01f5b1cdd0e5567c8f016c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\93P14F4G.txt

Filesize
603B

MD5
30e144bfd5123d9b8aef2905fde673d8

SHA1
98f1ef7bf946cc1dc38d86dd27d6b58f949cfebd

SHA256
410d089e71d086e5114d4baf154a1c22077dc3ee7d5039dec04cb45a7f072a67

SHA512
9b6ba46589f6a81b82452345a20d61f2b1f9fed426cdcbf43da4c104c1c1c94502faf858c32213dbf0a09f3f7f64a4c21d08833ca9b76d345ac7a56854557d62

Download Submit
\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I9NA5QYV\am_delta_patch_1.381.2084.0_a0c4dd331e1b07fe8efc3df418a0b614a789f200.exe

Filesize
1.5MB

MD5
d622e03d8373ac278bed709b0096a7bf

SHA1
a0c4dd331e1b07fe8efc3df418a0b614a789f200

SHA256
8921d94e01df6b7dc778ea13a48ef19949b59459566c36e47a401c3418622cb0

SHA512
3e754768010e119d49836d9dc07b018f5ad764971f0924a38abc6363f137838aab0e1dda80a83c792583da1a0884a7fc5583c9024b01f5b1cdd0e5567c8f016c

Download Submit