2903dcf58fe4135579893ae078d23cb67c48a0227ae0f1f084f5b2b6031fc83a

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
05/01/2024, 13:23

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General

Target

TLSBZ/Tlsbzdll.dll
Size

764KB
MD5

fd5d4af1e94717c261caa2220e728db4
SHA1

9c43a2fd2404b21517b3e7c5b0477b2f7ce60dba
SHA256

082797f702bc4fc705327a815cbb18dc8ed56bd424e2bd468bce44e8b4b6ae4a
SHA512

ce7b5bea6c8b94582fbc95c011e2ef08d9bd49a7297aed491a4bd9d1d9889bab563d15e08ccac374c5951143279d8893f6afb3272590ed038a2f415b278c4dbc
SSDEEP

12288:pzEzgy3Y/44Y2PRkQ9+7HfZNWJfocrBPWsp4sY88LozPzSj7XCOozRa:FAs44cffZkJfocXNV8CSj7SO

Score

7^/10

evasion

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-1-5-21-1268429524-3929314613-1992311491-1000\Software\Wine	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\CCRFG.SYS	rundll32.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2356	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2356	rundll32.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
468	Process not Found
468	Process not Found

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16
PID 2640 wrote to memory of 2356	2640	rundll32.exe	16

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\TLSBZ\Tlsbzdll.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\TLSBZ\Tlsbzdll.dll,#1
  2⤵
  - Identifies Wine through registry keys
  - Drops file in System32 directory
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:2356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2356-0-0x0000000010000000-0x00000000101C4000-memory.dmp

Filesize
1.8MB

Download
memory/2356-1-0x0000000010000000-0x00000000101C4000-memory.dmp

Filesize
1.8MB

Download
memory/2356-2-0x0000000000370000-0x0000000000371000-memory.dmp

Filesize
4KB

Download
memory/2356-5-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download
memory/2356-4-0x0000000000350000-0x0000000000351000-memory.dmp

Filesize
4KB

Download
memory/2356-3-0x0000000010000000-0x00000000101C4000-memory.dmp

Filesize
1.8MB

Download
memory/2356-8-0x0000000000A80000-0x0000000000A8E000-memory.dmp

Filesize
56KB

Download