bbdf82148359fbcb5a8c0b4f08f60e5cc6048dc383b1ce30cff72e85c0fb13d1

General

Target
bbdf82148359fbcb5a8c0b4f08f60e5cc6048dc383b1ce30cff72e85c0fb13d1.dll
Size 236KB
Sample240612-d4wl6azdnf
SHA256 bbdf82148359fbcb5a8c0b4f08f60e5cc6048dc383b1ce30cff72e85c0fb13d1
MD5 56519729c6a8994d31789e70d40cdad0
SHA1 5009b28ba51662688dcd6e914e05ac2b52393979
SHA512 184c76aa1def0f80eccc27d7d63b2d97f282348f0deb644ebb248cb77a831630666b8cfc2d40d4917736756ea83a63b0fda550b047cd8716514d184b5b162662
SSDEEP 6144:8uyh302LCj31sY3sf4i3qDiUEvm234kxq/YKsrEsG:8Rx0X31h3sgi3Iidvmq7KsG
MD5 SHA1 SHA512 SSDEEP

Score

9^/10

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4616-2-0x0000000010000000-0x000000001008A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4616-4-0x0000000010000000-0x000000001008A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 10 IoCs

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HFF = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\bbdf82148359fbcb5a8c0b4f08f60e5cc6048dc383b1ce30cff72e85c0fb13d1.dll\",FindFrame"	rundll32.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

Peripheral Device Discovery

System Information Discovery

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

Bootkit

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4616	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 4616	2076	rundll32.exe	80
PID 2076 wrote to memory of 4616	2076	rundll32.exe	80
PID 2076 wrote to memory of 4616	2076	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bbdf82148359fbcb5a8c0b4f08f60e5cc6048dc383b1ce30cff72e85c0fb13d1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bbdf82148359fbcb5a8c0b4f08f60e5cc6048dc383b1ce30cff72e85c0fb13d1.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Adds Run key to start application
  - Enumerates connected drives
  - Writes to the Master Boot Record (MBR)
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4616