1dd5bf67d2f7e0fc2e95baf84a8bda494668ff304fc6bb910b1c0d58d5a85bee

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10/06/2024, 02:31

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General

Target
ComDlls/TDAtOnce.dll
Size 173KB
Sample240610-czzmksbd97
SHA256 77e4a0a21ab80aca7a98fd31af8ba57fcaceef0dcb206b0ffcbd102ed1276874
MD5 a4800a943cf9664b8650ab295aea83c7
SHA1 7ee3f09a21bbb2bf7b6f14a0b157990035168d9b
SHA512 fed8a0d884127c8cc582aa5b0994e1916d69425479a05a9bdbf158fa7f2fa1fc9ba9622feca0d279a4a8b377f2bafabd52075ad7bfc9ad982fcc2a60b4fd09bc
SSDEEP 3072:eKRhsGgyGJuOcDDw+80BUOtpxcY1zP+j0rrmnjLrpa/3lLKScFxlAbzjSTo:lhPGsnF9cYrrrmjPMBUlA/jSs
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

adware stealer

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
2392	regsvr32.exe

Installs/modifies Browser Helper Object 2 TTPs 2 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\{01443AEC-0FD1-40fd-9C87-E93D1494C233}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\BROWSER HELPER OBJECTS\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\ = "Thunder AtOnce"	regsvr32.exe

Modifies registry class 49 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce.1\ = "ThunderAtOnce Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\VersionIndependentProgID\ = "XLF24.ThunderAtOnce"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor.1\ = "FlvMonitor Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor\CLSID\ = "{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce\CLSID\ = "{24D5AEB5-28F4-476B-9378-9B93AEE6075F}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\{AB2B5FEC-7CF7-40A5-B53E-C7175FBB8AE7}\ = "XLF24"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\ProgID\ = "XLF24.FlvMonitor.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor\ = "FlvMonitor Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\ProgID\ = "XLF24.ThunderAtOnce.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\{AB2B5FEC-7CF7-40A5-B53E-C7175FBB8AE7}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\ = "ThunderAtOnce Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor.1\CLSID\ = "{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\TypeLib\ = "{A3187009-B303-458C-9F01-0DAF932ECA17}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\AppID = "{AB2B5FEC-7CF7-40A5-B53E-C7175FBB8AE7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\AppID = "{AB2B5FEC-7CF7-40A5-B53E-C7175FBB8AE7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\VersionIndependentProgID\ = "XLF24.FlvMonitor"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\XLF24.DLL	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\XLF24.DLL\AppID = "{AB2B5FEC-7CF7-40A5-B53E-C7175FBB8AE7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\TypeLib\ = "{A3187009-B303-458C-9F01-0DAF932ECA17}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce.1\CLSID\ = "{24D5AEB5-28F4-476B-9378-9B93AEE6075F}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce\ = "ThunderAtOnce Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\ = "FlvMonitor Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce\CurVer\ = "XLF24.ThunderAtOnce.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.ThunderAtOnce\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XLF24.FlvMonitor\CurVer\ = "XLF24.FlvMonitor.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BCCEEB2A-CE32-42D7-9442-B9830B1B118D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ComDlls\\TDAtOnce_Now.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{01443AEC-0FD1-40fd-9C87-E93D1494C233}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ComDlls\\TDAtOnce_Now.dll"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28
PID 1752 wrote to memory of 2392	1752	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ComDlls\TDAtOnce.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1752
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\ComDlls\TDAtOnce.dll
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

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

TDAtOnce_Now.dll

Path \Users\Admin\AppData\Local\Temp\ComDlls\TDAtOnce_Now.dll
Size 173KB
SHA256 77e4a0a21ab80aca7a98fd31af8ba57fcaceef0dcb206b0ffcbd102ed1276874
MD5 a4800a943cf9664b8650ab295aea83c7
SHA1 7ee3f09a21bbb2bf7b6f14a0b157990035168d9b
SHA512 fed8a0d884127c8cc582aa5b0994e1916d69425479a05a9bdbf158fa7f2fa1fc9ba9622feca0d279a4a8b377f2bafabd52075ad7bfc9ad982fcc2a60b4fd09bc
SSDEEP 3072:eKRhsGgyGJuOcDDw+80BUOtpxcY1zP+j0rrmnjLrpa/3lLKScFxlAbzjSTo:lhPGsnF9cYrrrmjPMBUlA/jSs
MD5 SHA1 SHA512 SSDEEP

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memory/2392-2-0x00000000006D0000-0x00000000006FC000-memory.dmp

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