256e9b2ca5a6912e2ef4e07d8ba5ad102981d4bfd73d504fc1d0491d6845d1dc

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 13:23

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General

Target

37df99ff1cf1d2f19ac2be6367a42cb0.dll
Size

154KB
MD5

37df99ff1cf1d2f19ac2be6367a42cb0
SHA1

03836e68bf3bf4193e85adc6715eb67ae7e7f3e7
SHA256

256e9b2ca5a6912e2ef4e07d8ba5ad102981d4bfd73d504fc1d0491d6845d1dc
SHA512

eab42dcf1c5cba88a93a08c3d276af117806fe0759fb0103b7bdd29df6d9f8ba04380252fe9524b73ffaeea0f665bdd2dab5c7a518cf13a93d7c2d25ca30c8f7
SSDEEP

3072:Z5C6S53iafGjvBqpPw2La3cJtxrxpA383JHyUj5to:HcdiIGrBMPwUzJXrxGMt7o

Score

6^/10

adware persistence stealer

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\{eda1f0ec-18a7-c7a1-316a-6f398bb11a7d} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\37df99ff1cf1d2f19ac2be6367a42cb0.dll\" DllStart"	regsvr32.exe

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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}\NoExplorer = "\"\""	regsvr32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}\ = "targetedbanner browser optimizer"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}\InProcServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\37df99ff1cf1d2f19ac2be6367a42cb0.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8feb25d0-2619-02e3-ccb4-c5a4a3113399}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 4184	2240	regsvr32.exe	15
PID 2240 wrote to memory of 4184	2240	regsvr32.exe	15
PID 2240 wrote to memory of 4184	2240	regsvr32.exe	15

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\37df99ff1cf1d2f19ac2be6367a42cb0.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\37df99ff1cf1d2f19ac2be6367a42cb0.dll
  2⤵
  - Adds Run key to start application
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:4184

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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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