669385dcbf0bee44f50ddcf36981d1d4ca0aa88bbc503af97766ab7b4f0417ad

Analysis

max time kernel
159s
max time network
170s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2024, 06:36

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General

Target

b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Size

201KB
MD5

b6bfc7dc51fe1be7283ed92aa7d523d2
SHA1

47d3593f8afca4693cbd4a9dbe6bf30b362774f9
SHA256

669385dcbf0bee44f50ddcf36981d1d4ca0aa88bbc503af97766ab7b4f0417ad
SHA512

2bc1bd50b3b82941cff52e2e1a14e392d53b4ea7747842d1b97c4fc3ff5c916aacba28374b07a58461ac94d1a784a61161e6fb07c2621110f061e8bf939d0c64
SSDEEP

6144:i+YiDDitC24iMIblprbkEXgeKWJxhdYeBqd0:7DitC24inTbhXgeKKvlBZ

Score

7^/10

adware discovery persistence stealer

Malware Config

Signatures

Loads dropped DLL 6 IoCs

pid	Process
4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
1516	regsvr32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\yxtcewilfpyyw = "C:\\Windows\\System32\\regsvr32.exe /s \"C:\\Windows\\system32\\ufcjaxhbcmcg.dll\""	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\yxtcewilfpyyw = "C:\\Windows\\System32\\regsvr32.exe /s \"C:\\Windows\\system32\\ufcjaxhbcmcg.dll\""	regsvr32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Installs/modifies Browser Helper Object 2 TTPs 4 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D1BB0854-4006-7D82-0F01-210BBDD949B1}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\NoExplorer = "1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D1BB0854-4006-7D82-0F01-210BBDD949B1}	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\NoExplorer = "1"	b6bfc7dc51fe1be7283ed92aa7d523d2.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ufcjaxhbcmcg.dll	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
File created	C:\Windows\SysWOW64\rqswobbetefob.exe	b6bfc7dc51fe1be7283ed92aa7d523d2.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 40 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3275060323"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000001a0010ad04f8254f917a775005b5043100000000020000000000106600000001000020000000ec740e538e12c246e2a7fb2fbd6f379ca0e955274f4caf6b81865ec8c50426c5000000000e800000000200002000000092e17313b7aadc80fbad3f2ce26592f1ef0202d8a65115c6616c350ead8c454520000000026ba8e96b6b970482be7b2bd3de3c8179e2157ec513265cace24df4d87424924000000022e9cb2dd9b72e7dc88e3f2f3d6f55899fd4db1ee672ff29b0fa4f60d702d47f448f66ca0ec6f3ba25382ef9bab1940e786d0c95b25fe72e6393c4dec4659614	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{EC13B6D6-DB83-11EE-B09F-EA08C850D01B} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31092624"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3246153146"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31092624"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3275060323"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "416472001"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\MINIE	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000001a0010ad04f8254f917a775005b5043100000000020000000000106600000001000020000000a9eae9220fe5fbe8e72319d52f0d406aa706de61f354f3472492a061a00234a6000000000e8000000002000020000000b26c6f1cdc2d4b28f41ffc19e2fb9d7a88a7efccf89aea2acefac068ed8ef39d200000000cfd54951bca9358115770a0f856517d687b080c5465f23ea2a67246380fcc9d400000005b8e29e9dd28a84cd9994d337ff6d506b124030542311cdaa9ddbbf3d4708a79d5243bef302ceead135824cedbd7d916f71b9712fb08fd6ee6a8a2040bc81a26	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\""	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31092624"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 303693ca906fda01	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31092624"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 30f867c5906fda01	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3246153146"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\ = "precisead browser enhancer"	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\InProcServer32	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\InProcServer32\ThreadingModel = "Apartment"	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\InProcServer32\ = "C:\\Windows\\SysWow64\\ufcjaxhbcmcg.dll"	b6bfc7dc51fe1be7283ed92aa7d523d2.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\ = "precisead browser enhancer"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\InProcServer32\ = "C:\\Windows\\SysWow64\\ufcjaxhbcmcg.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\InProcServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D1BB0854-4006-7D82-0F01-210BBDD949B1}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2268	iexplore.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2268	iexplore.exe
2268	iexplore.exe
1680	IEXPLORE.EXE
1680	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4252 wrote to memory of 1516	4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe	91
PID 4252 wrote to memory of 1516	4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe	91
PID 4252 wrote to memory of 1516	4252	b6bfc7dc51fe1be7283ed92aa7d523d2.exe	91
PID 2268 wrote to memory of 1680	2268	iexplore.exe	96
PID 2268 wrote to memory of 1680	2268	iexplore.exe	96
PID 2268 wrote to memory of 1680	2268	iexplore.exe	96

C:\Users\Admin\AppData\Local\Temp\b6bfc7dc51fe1be7283ed92aa7d523d2.exe
"C:\Users\Admin\AppData\Local\Temp\b6bfc7dc51fe1be7283ed92aa7d523d2.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4252
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\system32\regsvr32.exe" /s "C:\Windows\system32\ufcjaxhbcmcg.dll"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1516

C:\Program Files (x86)\Internet Explorer\ielowutil.exe
"C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
1⤵
PID:4308

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2268 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\ver9D64.tmp

Filesize
15KB

MD5
1a545d0052b581fbb2ab4c52133846bc

SHA1
62f3266a9b9925cd6d98658b92adec673cbe3dd3

SHA256
557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

SHA512
bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\LIM5ZEZB\suggestions[1].en-US

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\nscF09C.tmp\NSISdl.dll

Filesize
14KB

MD5
f0e51d5722c11a4fe40c97b746c1ffc5

SHA1
8ec31853e9ef08fdc2a8c3c8eaa5f5b9469af193

SHA256
93a27f96055ae6b7f44916e13487b0efa7cd6d762e6768f7cb6427e32bda777d

SHA512
212c1ed753b54e5eccf7e1421bcca86955e09d6e3873f891d3d7076e21f79feb5f1dba350818804a215980875c306283b02f628fbc191d958f0de0f528c7194a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nscF09C.tmp\System.dll

Filesize
10KB

MD5
7e3c808299aa2c405dffa864471ddb7f

SHA1
b5de7804dd35ed7afd0c3b59d866f1a0749495e0

SHA256
91c47a9a54a3a8c359e89a8b4e133e6b7296586748ed3e8f4fe566abd6c81ddd

SHA512
599f61d5270227a68e5c4b8db41b5aa7bc17a4bbe91dd7336b410516fa6107f4f5bf0bbb3f6cc4b2e15b16bf9495fdc70832bab6262046cb136ad18f0c9b3738

Download Submit
C:\Windows\SysWOW64\ufcjaxhbcmcg.dll

Filesize
186KB

MD5
01b0a06783e1e96fef5ce32966e0e48c

SHA1
c61ed5bec7b8b574831973d242fb91b2775f06ab

SHA256
d9230befe6ba2faa7f6902abf1a13df5b754fa2776706e981ed0caf3dab63705

SHA512
e41838426c0890590664995e51356c6abea843a98ef5a7ef172ebb666e9cfe8ba2a3e5b030780390563cee60273f0ddc8466a8815be1d38b33eb9d8f16326c2a

Download Submit
memory/4252-9-0x0000000002C00000-0x0000000002C34000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads