aa331051db461ff1dc760616f23770293a91257087fd079e2e76c122db7c0561

General

Target

Hoa don tien no/wwlib.dll
Size

114KB
MD5

c6423f8911ed975ffa735eb14573e9f7
SHA1

2620e17b03d829a740960a2c4d907b2f7ea2219c
SHA256

fa259f953cd319da9bdcd84d40b2a89869bd307e8f9206b5653e78666f08f5b8
SHA512

d42f129421ed8678c2fa5cd152e1523747754cc07dcf60849e00e481e5ad601dfc80cd9624d5254235d077359f546395a2eec80f825da0733ec6e302789422c5

Score

8^/10

macro xlm

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

9 1644 rundll32.exe
16 1644 rundll32.exe

flow	pid	process
9	1644	rundll32.exe
16	1644	rundll32.exe

Suspicious Office macro 1 IoCs

Office document equipped with 4.0 macros.

macro xlm

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Office.doc	office_xlm_macros

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Modifies registry class 1 IoCs

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings rundll32.exe
Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

2900 WINWORD.EXE
2900 WINWORD.EXE
Suspicious use of SetWindowsHookEx 7 IoCs

Processes:

WINWORD.EXE

pid process

2900 WINWORD.EXE
2900 WINWORD.EXE
2900 WINWORD.EXE
2900 WINWORD.EXE
2900 WINWORD.EXE
2900 WINWORD.EXE
2900 WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	rundll32.exe

pid	process
2900	WINWORD.EXE
2900	WINWORD.EXE

pid	process
2900	WINWORD.EXE
2900	WINWORD.EXE
2900	WINWORD.EXE
2900	WINWORD.EXE
2900	WINWORD.EXE
2900	WINWORD.EXE
2900	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1048 wrote to memory of 1644	1048	rundll32.exe	rundll32.exe
PID 1048 wrote to memory of 1644	1048	rundll32.exe	rundll32.exe
PID 1048 wrote to memory of 1644	1048	rundll32.exe	rundll32.exe
PID 1644 wrote to memory of 2900	1644	rundll32.exe	WINWORD.EXE
PID 1644 wrote to memory of 2900	1644	rundll32.exe	WINWORD.EXE

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\Hoa don tien no\wwlib.dll",#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\Hoa don tien no\wwlib.dll",#1
2⤵
- Blocklisted process makes network request
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1644

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Office.doc" /o ""
3⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2900

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Office.doc
MD5
76d0b64858e5772a13d44a4268bb1217

SHA1
39d0daedfb2af65dcbe88fa171d6100843c98c09

SHA256
35444de65a359a2206eaf4dbf394582543088b196e1e88a1029bf7531125cc5b

SHA512
bdae16ce85117eed1c25ce0a676b67a1754e8d2223d6f04216d6ec1aad77c98d9e30a9fa338fe051395e33e6d7043ef7e5572d03e9db64885e0efa99d279e20a

Download Submit
memory/1644-2-0x0000000000000000-mapping.dmp

Download
memory/1644-4-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

Filesize
4KB

Download
memory/1644-5-0x0000000004AD0000-0x0000000004AD1000-memory.dmp

Filesize
4KB

Download
memory/1644-12-0x0000000004B60000-0x0000000005560000-memory.dmp

Filesize
10.0MB

Download
memory/2900-3-0x0000000000000000-mapping.dmp

Download
memory/2900-6-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/2900-7-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/2900-8-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/2900-9-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/2900-10-0x00007FFA66640000-0x00007FFA66C77000-memory.dmp

Filesize
6.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads