b587d4861a5d9fff2e508ad7976acdebc38538143f64c00d107c0629bf082f2a

General

Target

b587d4861a5d9fff2e508ad7976acdebc38538143f64c00d107c0629bf082f2a.dll
Size

96KB
MD5

a4d99714555817d3de465cb30036445e
SHA1

4c646324817ce80485eec8f4a3c34c4dcb8d6d76
SHA256

b587d4861a5d9fff2e508ad7976acdebc38538143f64c00d107c0629bf082f2a
SHA512

d86133d8b38bed2a843930e0998d8e52e520392ece7b709269e919cefd5f713d8465c2dcc4f136c0b4f63f0edad83f9b97e51fda99bb82d78b281959592c780d
SSDEEP

768:I+JDl3hS/ANGOEd50x0ZDbMGACEvHlDo3xqXBvL5w/wfU+FX:Ba/kofDmHz5f8+p

Score

8^/10

discovery

Malware Config

Signatures

Manipulates Digital Signatures 1 TTPs 22 IoCs

Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

SIP and Trust Provider Hijacking

T1553.003

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllEncodeObject\1.3.6.1.4.1.311.16.4\FuncName = "EncodeRecipientID"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllDecodeObject\1.3.6.1.4.1.311.16.4\Dll = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllDecodeObject\1.3.6.1.4.1.311.16.4\FuncName = "DecodeRecipientID"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllFormatObject\1.3.6.1.5.5.7.3.4\FuncName = "FormatPKIXEmailProtection"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\CertCheck\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$DLL = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\Certificate\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$Function = "WintrustCertificateTrust"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\CertCheck\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$Function = "CertTrustCertPolicy"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\FinalPolicy\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$DLL = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\FinalPolicy\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$Function = "CertTrustFinalPolicy"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\Cleanup\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$DLL = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllEncodeObject\1.3.6.1.4.1.311.16.1.1\Dll = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllDecodeObject\1.3.6.1.4.1.311.16.1.1\Dll = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\Certificate\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$DLL = "wintrust.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllFormatObject\2.5.29.32\Dll = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllDecodeObject\1.3.6.1.4.1.311.16.1.1\FuncName = "DecodeAttrSequence"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllFormatObject\2.5.29.32\FuncName = "FormatVerisignExtension"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\Initialization\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$Function = "CertTrustInit"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\Cleanup\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$Function = "CertTrustCleanup"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllEncodeObject\1.3.6.1.4.1.311.16.1.1\FuncName = "EncodeAttrSequence"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllEncodeObject\1.3.6.1.4.1.311.16.4\Dll = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\OID\EncodingType 1\CryptDllFormatObject\1.3.6.1.5.5.7.3.4\Dll = "cryptdlg.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Cryptography\Providers\Trust\Initialization\{7801EBD0-CF4B-11D0-851F-0060979387EA}\$DLL = "cryptdlg.dll"	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

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31
PID 1628 wrote to memory of 2080	1628	regsvr32.exe	31

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b587d4861a5d9fff2e508ad7976acdebc38538143f64c00d107c0629bf082f2a.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\b587d4861a5d9fff2e508ad7976acdebc38538143f64c00d107c0629bf082f2a.dll
  2⤵
  - Manipulates Digital Signatures
  - System Location Discovery: System Language Discovery
  PID:2080