597d06e44811afb2e030ccca2ae68e765ab69a08b27bc61d41f4caa7e60756c5

Analysis

max time kernel
103s
max time network
114s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
17/03/2025, 13:54

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General

Target

Skype4COM.dll
Size

2.1MB
MD5

9bba1351fca721098980ecf4aad72946
SHA1

f3cea300587ee83f374bed72a5f4e0b1c9fb41ab
SHA256

bbb93044bb0894923bb640d01690deafb9c24d4f0d3b44edd47ee66fe7b84bca
SHA512

195d9800d0152af5d4e8e84ae843472ef125cb8787fc6f62cdc8ad8201de2e978d0bbaed338e923d764b6ffc055c4b7366399ca0913a4e406ade6b7f0c7d580d
SSDEEP

12288:J/F+4OKSqoMZCu5oszWyPRRo/yDIWBmu/tcmzyCVPEWnqkrP4tCLt7TH5+GffxR0:xF+4OKToMZCuRWARC/ZwHGrkktc+k71K

Score

3^/10

discovery

Malware Config

Signatures

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 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{222C0F35-3D78-4570-9F6D-BAEE289D0304}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.CallChannelManager	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F278D870-7AF7-4957-96EE-E6AC72D0B109}\ProgID\ = "Skype4COM.SmsMessage.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5792FC7D-5E1D-4F1A-BD4F-A7A50F92BC6E}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{D8F1BCC4-2A73-47B9-83B3-D4D299CA5BC6}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B76C04C9-0EB1-4748-B0C0-D01DEB595906}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A7DF2611-D752-4C9F-A90A-B56F18485EE9}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{89DD2F9D-C325-48BF-A615-96BD039BBC83}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.SmsMessageCollection\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5792FC7D-5E1D-4F1A-BD4F-A7A50F92BC6E}\ProgID\ = "Skype4COM.SmsChunk.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1878BFE-53D3-402E-8C86-190B19AF70D5}\ = "ISkype"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1878BFE-53D3-402E-8C86-190B19AF70D5}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AEB48497-5090-479C-8BE0-BD51597156A1}\ = "IConference"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B9A3D72F-04C1-4878-993C-D89F83E20569}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D26B1D42-9C42-4E7B-BB73-86384C4B4345}\ProgID\ = "Skype4COM.Call.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9017071A-2E34-4C3A-9BBB-688CBB5A9FF2}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.ApplicationStreamCollection.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4B42750B-57A1-47E7-B340-8EAE0E3126A4}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.Command.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AEB48497-5090-479C-8BE0-BD51597156A1}\ = "IConference"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3E0C529-7D4F-4AF5-B501-27D25D4D2825}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0EF6FD5D-607D-4EA3-9C90-683D73449E9D}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2EEAB6D0-491E-4962-BBA1-FF1CCA6D4DD0}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.PluginEvent\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{DD0E8ED5-1494-4B87-A35C-39F6ED4B1153}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.ApplicationStream.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E072F615-F833-4BCA-B473-CEE44D302030}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9511117A-7BCA-4669-BE96-6EA6866975C1}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{82D97F2A-0E17-40F3-8E01-24937F936FF4}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{70A59A25-E823-4C3F-8F33-775008895EE3}\ = "IFileTransferCollection"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7B030003-037D-490D-9169-A4F391B3D831}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B09AC3FF-0D5D-41C6-A34E-7C3F58A3127C}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6AC51E9C-7947-4B46-A978-0AD601C4EFC9}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Skype4COM.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4C5C99DC-09CF-4A9C-BD94-8D655454A1F4}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4C5C99DC-09CF-4A9C-BD94-8D655454A1F4}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4D36B368-B88C-45FA-B136-3EF77B2EAD39}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C219279C-F557-4BAD-B3BE-750E91CA9944}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.Conversion.1\CLSID\ = "{2EEAB6D0-491E-4962-BBA1-FF1CCA6D4DD0}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F278D870-7AF7-4957-96EE-E6AC72D0B109}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Skype4COM.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9ADA565-2FAD-424D-878C-7AD12DF9E617}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{30C27C77-525F-4A3F-B9DD-C5A77C67250D}\TypeLib\ = "{03282B5D-B38F-469D-849A-09B0A7F4881B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A2365EF3-4805-4DD3-A9D4-1A8AE3E17D84}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4D33E14E-9921-4860-92F4-5DC1586F403C}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7B030003-037D-490D-9169-A4F391B3D831}\ = "UserCollection Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.Call\CLSID\ = "{D26B1D42-9C42-4E7B-BB73-86384C4B4345}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.SmsMessage\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{052A4165-010A-457D-A874-E661B6322846}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{838731B0-88E7-4BED-81DC-B35CA8433341}\ = "IClient"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A9B9C33A-49A6-41D5-B13F-2AA4F284F406}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{55A5200C-B2E8-4795-A6FA-858CA3FE2F26}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2B929860-6AF4-40DF-9D77-308CA7C23E66}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F3188CF3-EF22-4C5B-92CB-605964761C3B}\VersionIndependentProgID\ = "Skype4COM.CallCollection"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.Group\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.GroupCollection\ = "GroupCollection Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B0FE88F0-C92F-46D6-878F-31599BEA944C}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.Command.1\ = "Command Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.CallChannelManager.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4CFF5C70-3C95-4566-824A-FA164586D535}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.CallCollection\CurVer\ = "Skype4COM.CallCollection.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7ACDC5B4-76A1-4BDF-918D-6962FCABBAD3}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4B42750B-57A1-47E7-B340-8EAE0E3126A4}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Skype4COM.Settings\CurVer\ = "Skype4COM.Settings.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9511117A-7BCA-4669-BE96-6EA6866975C1}\ = "IChatMessageCollection"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B77A3D1F-6847-402F-BB82-A0564379088E}	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 3776	5100	regsvr32.exe	86
PID 5100 wrote to memory of 3776	5100	regsvr32.exe	86
PID 5100 wrote to memory of 3776	5100	regsvr32.exe	86

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Skype4COM.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\Skype4COM.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:3776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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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