66b05198714d00ca62085a223a5f602bc100d9342449c466cdc658091d555972

General

Target

66b05198714d00ca62085a223a5f602bc100d9342449c466cdc658091d555972.dll
Size

291KB
MD5

50ff394db0e48b51160101010c77a9e9
SHA1

c28cbbe2cd48023b74cbf161803b4c6fa5bd1e5d
SHA256

66b05198714d00ca62085a223a5f602bc100d9342449c466cdc658091d555972
SHA512

8edbb65dbfbd8ef2cfcad6cc9f852e4a7c888ce2583fcbed0ccc32ddb031a13a05a1ad7e97aa18d78fca29f3a182f1710ae826588bcb7ae5f99d2d6581d34564
SSDEEP

6144:LT5L0mONfbiVDYm1Pot04jJDLCp+ET4bJWbuG:H263P+x7yZ6G

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 10 IoCs

flow	pid	Process
3	2820	rundll32.exe
7	2820	rundll32.exe
8	2820	rundll32.exe
9	2820	rundll32.exe
10	2820	rundll32.exe
13	2820	rundll32.exe
14	2820	rundll32.exe
15	2820	rundll32.exe
17	2820	rundll32.exe
18	2820	rundll32.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Linycpy = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\66b05198714d00ca62085a223a5f602bc100d9342449c466cdc658091d555972.dll\",SetHandle"	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

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe

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 persistence

Bootkit

T1542.003

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

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

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 2 IoCs

pid	Process
2820	rundll32.exe
2820	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30
PID 2776 wrote to memory of 2820	2776	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\66b05198714d00ca62085a223a5f602bc100d9342449c466cdc658091d555972.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\66b05198714d00ca62085a223a5f602bc100d9342449c466cdc658091d555972.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Adds Run key to start application
  - Enumerates connected drives
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2820-0-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/2820-1-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/2820-2-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads