85e1ecc1992015d6f946a183ceaaf9e022fbcc36bdb2a7fa13bf2337f9c60c38

Analysis

max time kernel
37s
max time network
31s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03/12/2022, 22:22

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General

Target

85e1ecc1992015d6f946a183ceaaf9e022fbcc36bdb2a7fa13bf2337f9c60c38.dll
Size

998KB
MD5

fd4fa44ae6b548123f7b136fb1811be9
SHA1

426fe9207035c449b6fbd9e25bfeed5550e2bf94
SHA256

85e1ecc1992015d6f946a183ceaaf9e022fbcc36bdb2a7fa13bf2337f9c60c38
SHA512

457ba7a8acb1c0fd28bf143aa548dc8fb918d7edcf44ef83946e63a7ef95d3ba6a85caa49f80028e9f43522b8f62699c2af9794909e63f4391d95607cc70208f
SSDEEP

24576:UeVlmJUzOLgGGDu/DtJvTyHOeF/l43kdz5oy1p:UriSLgPDQDtJvaOeY3kdz5

Score

7^/10

bootkit evasion persistence trojan

Malware Config

Signatures

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Wine	rundll32.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	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

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1892	rundll32.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\install07185.log	rundll32.exe

Modifies registry class 8 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AA205D65-8B22-3E73-ADE5-A35F99E4}\ProdID = 571817289797e6d7	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B45784DD-AD9E-22E1-FC63-7593D685}	rundll32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B45784DD-AD9E-22E1-FC63-7593D685}\ProdID = 546b3e81546b3e81	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5FE08F25-5BEA-FE82-285D-25F4D60A}	rundll32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5FE08F25-5BEA-FE82-285D-25F4D60A}\ProdID = e719172a8795e6d5	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9277DAF2-0800-B9F8-FD79-D1A5AB1E}	rundll32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9277DAF2-0800-B9F8-FD79-D1A5AB1E}\ProdID = 84060fde84060fde	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AA205D65-8B22-3E73-ADE5-A35F99E4}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1892	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28
PID 2028 wrote to memory of 1892	2028	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\85e1ecc1992015d6f946a183ceaaf9e022fbcc36bdb2a7fa13bf2337f9c60c38.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\85e1ecc1992015d6f946a183ceaaf9e022fbcc36bdb2a7fa13bf2337f9c60c38.dll,#1
  2⤵
  - Identifies Wine through registry keys
  - Checks whether UAC is enabled
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Drops file in Windows directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:1892

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1892-55-0x00000000760B1000-0x00000000760B3000-memory.dmp

Filesize
8KB

Download
memory/1892-56-0x00000000750B0000-0x00000000752E1000-memory.dmp

Filesize
2.2MB

Download
memory/1892-57-0x0000000074DF0000-0x0000000075021000-memory.dmp

Filesize
2.2MB

Download
memory/1892-58-0x0000000074DF0000-0x0000000075021000-memory.dmp

Filesize
2.2MB

Download