9720d1e79d6e002923a1d5ae7f9f83f0335891c99e1a7007eda1dc58ce0f8c59

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
12/09/2024, 22:38

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General

Target

cloudwebim.dll
Size

124KB
MD5

d08fbf125aec622e66930bbda76fabeb
SHA1

5aa42e80850fa27a11aa14a0148d7cbfef1e2e06
SHA256

8561072f07d582fb2e5ec8478349aa27453559e7463c02c04c1e9fdb3b5e24b9
SHA512

0155c1674130ddb25f04d1ea6bf3b4eb4bcedb1cc52c6e359c568fea8bbeba6926b8893ed375275ac1412571e6f7ef5183331674be20e69295116183fd321d7f
SSDEEP

3072:zNG0Zei/azzmWxd/mZQA3Yi46eqtEGrxND:ZtryKYJmmAbe8rz

Score

6^/10

adware discovery stealer

Malware Config

Signatures

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\ = "CloudExs30003APIClass Helper"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}	regsvr32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Modifies registry class 46 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\TypeLib\ = "{28D0891A-FC61-BC53-7723-61F5E5B9B711}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass.1\CLSID\ = "{38D0891A-FC61-Bc53-7723-61F5E5B9B711}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass\ = "CloudExs30003APIClass Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass\CLSID\ = "{38D0891A-FC61-Bc53-7723-61F5E5B9B711}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\ = "ICloudExs30003API"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass\CurVer\ = "CloudExs30003BHO.CloudExs30003APIClass.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\ = "ICloudExs30003API"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\TypeLib\ = "{28D0891A-FC61-BC53-7723-61F5E5B9B711}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\ProgID\ = "CloudExs30003BHO.CloudExs30003APIClass.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\VersionIndependentProgID\ = "CloudExs30003BHO.CloudExs30003APIClass"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\TypeLib\ = "{28D0891A-FC61-Bc53-7723-61F5E5B9B711}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass.1\ = "CloudExs30003APIClass Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\ = "CloudWeb Web3.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CloudExs30003BHO.CloudExs30003APIClass	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38D0891A-FC61-Bc53-7723-61F5E5B9B711}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\cloudwebim.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\ = "CloudExs30003APIClass 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{28D0891A-FC61-BC53-7723-61F5E5B9B711}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\cloudwebim.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{18D0891A-FC61-BC53-7723-61F5E5B9B711}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 800 wrote to memory of 2216	800	regsvr32.exe	28
PID 800 wrote to memory of 2216	800	regsvr32.exe	28
PID 800 wrote to memory of 2216	800	regsvr32.exe	28
PID 800 wrote to memory of 2216	800	regsvr32.exe	28
PID 800 wrote to memory of 2216	800	regsvr32.exe	28
PID 800 wrote to memory of 2216	800	regsvr32.exe	28
PID 800 wrote to memory of 2216	800	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\cloudwebim.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:800
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\cloudwebim.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:2216

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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