hxxps://sierrabancorp[.]q4ir[.]com/homepage/default[.]aspx

Analysis

max time kernel
73s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
11/07/2023, 00:05

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General

Target

https://sierrabancorp.q4ir.com/homepage/default.aspx

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-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 3018927e8bb3d901	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb0100000043db47ff6362a24abd0df5a96fa93c46000000000200000000001066000000010000200000001739b4d11c00b11579e7151f70b46d170d0d81d620809c7dd02a463bd91895d1000000000e80000000020000200000009242f3ed38d9d71faf6f578e41911c4db61bfb0caf4b4ac88bb958d2ed60c0b32000000090730d1b336cf4765d17e31b95d8388216079ced25b4d66e57acb10f36ab80b840000000cf81d6516213ee53207cdd9b37931c5b9f113cc7c44daadd3e8afe59a4e1fbf48e553005c12984130525ae7b58363dcc529b433ded6685f02caf8914e4b69c31	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2067414113"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2076165031"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\q4ir.com\NumberOfSubdomains = "1"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\DOMStorage\Total	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\sierrabancorp.q4ir.com\ = "10"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\q4ir.com\Total = "10"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\q4ir.com\Total = "0"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2067414113"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\DOMStorage\q4ir.com	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb0100000043db47ff6362a24abd0df5a96fa93c4600000000020000000000106600000001000020000000b9cfa3075e4a53abd5d832369e69bf8212f5c2afdaa13d6bfca7a9f9d6174a89000000000e800000000200002000000095e7d072bf4e4736789126dd7e4a0f1a16d047e1bd36691893f42c32bb0fd5e0200000000341d18da20a762a693ac7fd732eeac19bc2407e42d8c6778d184df8fa37a5ea40000000b315981feb66c2a3f1b3279428ff8547c1342de8ee95eec5c0ef23fff8e91abcba6dec3e8354edb0661f270d6a64f545a78315b2abb6f27161a1d6c27c7b2ea4	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 108e9b7e8bb3d901	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31044491"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\Total\ = "10"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\DOMStorage\sierrabancorp.q4ir.com	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "395798907"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\Total\ = "0"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{A6B2B722-1F7E-11EE-B651-4E773A6B0D09} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\sierrabancorp.q4ir.com\ = "0"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31044491"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31044491"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\q4ir.com	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3195054982-4292022746-1467505928-1000\Software\Microsoft\Internet Explorer\IESettingSync	IEXPLORE.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
492	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
492	iexplore.exe
492	iexplore.exe
5020	IEXPLORE.EXE
5020	IEXPLORE.EXE
5020	IEXPLORE.EXE
5020	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 492 wrote to memory of 5020	492	iexplore.exe	84
PID 492 wrote to memory of 5020	492	iexplore.exe	84
PID 492 wrote to memory of 5020	492	iexplore.exe	84

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://sierrabancorp.q4ir.com/homepage/default.aspx
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:492
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:492 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:5020

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\Internet Explorer\DOMStore\IP2REFEW\sierrabancorp.q4ir[1].xml

Filesize
13B

MD5
c1ddea3ef6bbef3e7060a1a9ad89e4c5

SHA1
35e3224fcbd3e1af306f2b6a2c6bbea9b0867966

SHA256
b71e4d17274636b97179ba2d97c742735b6510eb54f22893d3a2daff2ceb28db

SHA512
6be8cec7c862afae5b37aa32dc5bb45912881a3276606da41bf808a4ef92c318b355e616bf45a257b995520d72b7c08752c0be445dceade5cf79f73480910fed

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\tgn5mpm\imagestore.dat

Filesize
1KB

MD5
6893f085b1321d1c0159c447947c79b2

SHA1
2a650f5c0ce07dcfd82061a9b3dcc2ce1cae12ef

SHA256
6986b09a7ffff9da0e9715b7a6ee10e8c1e081a8df58a3607912d416d3c25880

SHA512
6fa81dd62ed69f4733392fd8715c80ba2e5f61b010c23b5dea17c7da59cc443114cd7fcf7b2cc50f46003fadaf59c6cec7cf2592b0c10d001eb09d98251a7784

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\5XLATO3O\favicon[1].ico

Filesize
1KB

MD5
441a7ae61aa99ed1606873bc2de26e64

SHA1
b1cbfca561cc3ae4b5faa181bb39ce07c3c8f5d4

SHA256
8c658b371a9483756996c494a46efc2180626954ee7bb464b15d20a7572ee87a

SHA512
aefd2da1245a12e2846c3c0ed0eb999a7ba98ce009a18d5f3ccbf31fe334dc8fa1435f32806e41bb56c72e30654283ca932350f687b50dcfd926e57ce64faf6e

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

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit