7bf27bef3260c2b7779c3c80fa5bdfe07406806c8e63f15d347843e3e136f17c

Analysis

max time kernel
22s
max time network
45s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/12/2023, 19:16

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General

Target

373983f3c1da9ffacc6d711e3ce2088f.exe
Size

92KB
MD5

373983f3c1da9ffacc6d711e3ce2088f
SHA1

043a3a380afc8eacc646da8ab2cda62c2a23fb22
SHA256

7bf27bef3260c2b7779c3c80fa5bdfe07406806c8e63f15d347843e3e136f17c
SHA512

d0ec5d98397d5aebe8848495e62cb54a43f0f7486110659e5b018de4ec8f6f41134e04287cde48696cee6064c700e6c07d44aefce8b382af9bb2f264e19ca2cb
SSDEEP

1536:4TTo31t4oQE1iWzzmMdpYHbqtNv+TTo1:4TTo30oQgmM7Y7kv+TTo1

Score

7^/10

upx

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
3028	regsvr32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2740-0-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/2740-10-0x0000000000400000-0x0000000000418000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\mb\dllleblm.dll	373983f3c1da9ffacc6d711e3ce2088f.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\userid.txt	373983f3c1da9ffacc6d711e3ce2088f.exe
File created	C:\Windows\reg.reg	373983f3c1da9ffacc6d711e3ce2088f.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 45 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\QvodAdBlocker.QvodBlock	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ProxyStubClsid\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\TypeLib\ = "{27D0FC90-FBE3-4016-8921-B3C0C228FB12}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\VERSION	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\TypeLib\ = "{27D0FC90-FBE3-4016-8921-B3C0C228FB12}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\QvodAdBlocker.QvodBlock\ = "QvodAdBlocker.QvodBlock"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\HELPDIR\ = "C:\\Program Files\\mb"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\QvodAdBlocker.QvodBlock\Clsid\ = "{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\QvodAdBlocker.QvodBlock\Clsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ProxyStubClsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ = "_QvodBlock"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ = "QvodBlock"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\Implemented Categories	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\0\win32\ = "C:\\Program Files\\mb\\dllleblm.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ = "_QvodBlock"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\ = "QvodAdBlocker.QvodBlock"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\ProgID\ = "QvodAdBlocker.QvodBlock"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\VERSION\ = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\ = "QvodAdBlocker"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{27D0FC90-FBE3-4016-8921-B3C0C228FB12}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\TypeLib\ = "{27D0FC90-FBE3-4016-8921-B3C0C228FB12}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E72D6DC7-E1AB-43CB-AF21-13440B5AAFBB}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5B4AC492-FB79-44E0-9FD3-B5F1BF972B4D}\InprocServer32\ = "C:\\Program Files\\mb\\dllleblm.dll"	regsvr32.exe

Runs .reg file with regedit 1 IoCs

pid	Process
1960	regedit.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2740	373983f3c1da9ffacc6d711e3ce2088f.exe
2740	373983f3c1da9ffacc6d711e3ce2088f.exe
2740	373983f3c1da9ffacc6d711e3ce2088f.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 3028	2740	373983f3c1da9ffacc6d711e3ce2088f.exe	102
PID 2740 wrote to memory of 3028	2740	373983f3c1da9ffacc6d711e3ce2088f.exe	102
PID 2740 wrote to memory of 3028	2740	373983f3c1da9ffacc6d711e3ce2088f.exe	102
PID 2740 wrote to memory of 1360	2740	373983f3c1da9ffacc6d711e3ce2088f.exe	99
PID 2740 wrote to memory of 1360	2740	373983f3c1da9ffacc6d711e3ce2088f.exe	99
PID 2740 wrote to memory of 1360	2740	373983f3c1da9ffacc6d711e3ce2088f.exe	99

C:\Users\Admin\AppData\Local\Temp\373983f3c1da9ffacc6d711e3ce2088f.exe
"C:\Users\Admin\AppData\Local\Temp\373983f3c1da9ffacc6d711e3ce2088f.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Windows\SysWOW64\cmd.exe
  cmd /c regedit.exe /s C:\Windows\reg.reg
  2⤵
  PID:1360
- - C:\Windows\SysWOW64\regedit.exe
    regedit.exe /s C:\Windows\reg.reg
    3⤵
    - Runs .reg file with regedit
    PID:1960
- C:\Windows\SysWOW64\regsvr32.exe
  regsvr32.exe /s "C:\Program Files\mb\dllleblm.dll"
  2⤵
  - Loads dropped DLL
  - Modifies registry class
  PID:3028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2740-0-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2740-10-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download