5e2b7ee91606a8a2327f731f4d863c505daa70a9eb10ca0700529f6aa4fd61a8

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
01/08/2024, 21:33

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General

Target

acpdfcrext.dll
Size

268KB
MD5

3b9a6a82bbb4846897588a822e5ceb75
SHA1

d7ecec9745504e86837b226dde7b5fda5d88e3dc
SHA256

9dfdf570ad994331c1a83688e7ebc5a54c22892a553dd80e9425bb421f50860d
SHA512

45a0d859b8722326dfb9d98d3ce10846dae83a75b2f87638d5455d9bd902b04fe9dccdeaa68ee3d5f088834f30b48c3cff7ea0997568033c45402c610d92970e
SSDEEP

6144:gUXDmOsOpiu4IM9oMrcKCKYeNWKJg0nTxebQpVH:gUTmxOpiu4YCCKTvXLp

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\AcPDFCrExt.acPropertiesDlg\CurVer\ = "AcPDFCrExt.acPropertiesDlg.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{497D7850-6F1F-4501-97A4-1F367DF398E9}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acCategory.1\ = "acCategory Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{02CA0058-5208-4455-910A-8F916C878AEA}\MiscStatus\1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{67E6EB4C-A429-4D10-84E1-443D6BE717CE}\ToolboxBitmap32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\acpdfcrext.dll, 101"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{076B9A5F-7F09-4579-A190-30AC51EA7838}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{31BD0561-DEF7-4442-ABC0-E38E3A4CE2B5}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{210BE698-5EDF-4541-A92A-4AD391724695}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CE67D946-C7F6-4172-BAAA-EE3B13791220}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\acpdfcrext.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acBookmarkCtrl\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{076B9A5F-7F09-4579-A190-30AC51EA7838}\TypeLib\ = "{7582C531-E00F-44D9-83A4-516E5BE4CD8B}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{76238F0E-0D67-4CC3-8FA1-DD0B02854091}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{76238F0E-0D67-4CC3-8FA1-DD0B02854091}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{DCDD650B-53E4-467D-AF0E-24FE8DD659B4}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{837E46D8-E72A-42E5-9D07-B025FE198837}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acFormat\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{02CA0058-5208-4455-910A-8F916C878AEA}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{497D7850-6F1F-4501-97A4-1F367DF398E9}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{210BE698-5EDF-4541-A92A-4AD391724695}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acBookmarkCtrl.1\CLSID\ = "{02CA0058-5208-4455-910A-8F916C878AEA}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\Insertable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acGridUnitsDlg.1\CLSID\ = "{CB606431-6A88-438E-82CF-C4BAF1FF3BD9}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{406DEDFA-2E41-41E0-B01A-5FACE4630CEC}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{76238F0E-0D67-4CC3-8FA1-DD0B02854091}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{D4F2ADD3-A7A6-4EF6-A19C-E18C51C78B07}\TypeLib\ = "{7582C531-E00F-44D9-83A4-516E5BE4CD8B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{406DEDFA-2E41-41E0-B01A-5FACE4630CEC}\TypeLib\ = "{7582C531-E00F-44D9-83A4-516E5BE4CD8B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{76238F0E-0D67-4CC3-8FA1-DD0B02854091}\ = "_IacPropCtrlEvents"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{76238F0E-0D67-4CC3-8FA1-DD0B02854091}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acCategory\CLSID\ = "{CE67D946-C7F6-4172-BAAA-EE3B13791220}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acFormat.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{02CA0058-5208-4455-910A-8F916C878AEA}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{76238F0E-0D67-4CC3-8FA1-DD0B02854091}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acFormatter\ = "acFormatter Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\Control	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\ToolboxBitmap32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{D4F2ADD3-A7A6-4EF6-A19C-E18C51C78B07}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{497D7850-6F1F-4501-97A4-1F367DF398E9}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{02CA0058-5208-4455-910A-8F916C878AEA}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{02CA0058-5208-4455-910A-8F916C878AEA}\MiscStatus	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{D4F2ADD3-A7A6-4EF6-A19C-E18C51C78B07}\ = "IacCategory"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2924E0C9-3296-4C74-81B9-6A3C029F5D9A}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acFormat.1\ = "acFormat Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\StatusBar.acStatusCtrl\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5740088C-FC50-4CC2-86F5-A59A3536C823}\TypeLib\ = "{7582C531-E00F-44D9-83A4-516E5BE4CD8B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{02CA0058-5208-4455-910A-8F916C878AEA}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{67E6EB4C-A429-4D10-84E1-443D6BE717CE}\MiscStatus\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{67E6EB4C-A429-4D10-84E1-443D6BE717CE}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{406DEDFA-2E41-41E0-B01A-5FACE4630CEC}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acFormatter.1\ = "acFormatter Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AcPDFCrExt.acCategory\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CE67D946-C7F6-4172-BAAA-EE3B13791220}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2924E0C9-3296-4C74-81B9-6A3C029F5D9A}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{837E46D8-E72A-42E5-9D07-B025FE198837}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{505CA721-1698-4EDF-899B-13D7A04E4083}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{03A08E5F-58AD-4173-B3A5-3F6B795EC9B2}\MiscStatus\1\ = "131473"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\StatusBar.acStatusCtrl.1\CLSID\ = "{67E6EB4C-A429-4D10-84E1-443D6BE717CE}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{497D7850-6F1F-4501-97A4-1F367DF398E9}\TypeLib\ = "{7582C531-E00F-44D9-83A4-516E5BE4CD8B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{406DEDFA-2E41-41E0-B01A-5FACE4630CEC}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{837E46D8-E72A-42E5-9D07-B025FE198837}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{505CA721-1698-4EDF-899B-13D7A04E4083}\ProgID	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30
PID 2516 wrote to memory of 1708	2516	regsvr32.exe	30

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\acpdfcrext.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\acpdfcrext.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:1708

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

Windows 7 deprecation

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