31475717735f9aee20def2a4044b42a52cb92e8cf885b92a042099a273688135

Analysis

max time kernel
141s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
24-07-2023 22:32

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General

Target

Challenge_FIles/income_tax_and_benefit_return_2021.docx
Size

23KB
MD5

55998cb43459159a5ed4511f00ff3fc8
SHA1

9bec2182cc5b41fe8783bb7ab6e577bac5c19f04
SHA256

d0e1f97dbe2d0af9342e64d460527b088d85f96d38b1d1d4aa610c0987dca745
SHA512

8f04951f9efb5acdad0a625d9f63154089d552fe4281ca53a759cc0a0468b8d9c76af863e34ed6e00802225a4408bcda1110a6efce30357e6173973ea5bf7838
SSDEEP

384:Q6UDg00MWEg9fPCPyH111/elBqhveoNHfn5yAehqbhtgyhdCxi556BjsbIwRq:QcMWE04uebyvNv5yHcttg6dwc5YQb5w

Score

1^/10

Malware Config

Signatures

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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

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

NTFS ADS 1 IoCs

Processes:

WINWORD.EXE

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\Challenge_FIles\mhtml:http:\hidusi.com\e8c76295a5f9acb7\side.html!x-usc:http:\hidusi.com\e8c76295a5f9acb7\side.html	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

3756 WINWORD.EXE
3756 WINWORD.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WINWORD.EXE

description pid process

Token: SeAuditPrivilege 3756 WINWORD.EXE
Suspicious use of SetWindowsHookEx 8 IoCs

Processes:

WINWORD.EXE

pid process

3756 WINWORD.EXE
3756 WINWORD.EXE
3756 WINWORD.EXE
3756 WINWORD.EXE
3756 WINWORD.EXE
3756 WINWORD.EXE
3756 WINWORD.EXE
3756 WINWORD.EXE
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

pid	process
3756	WINWORD.EXE
3756	WINWORD.EXE

description	pid	process
Token: SeAuditPrivilege	3756	WINWORD.EXE

pid	process
3756	WINWORD.EXE
3756	WINWORD.EXE
3756	WINWORD.EXE
3756	WINWORD.EXE
3756	WINWORD.EXE
3756	WINWORD.EXE
3756	WINWORD.EXE
3756	WINWORD.EXE

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\Challenge_FIles\income_tax_and_benefit_return_2021.docx" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3756

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\Content.MSO\58FA3C78.dat
Filesize
52B

MD5
07ffeff17a8a1a1209ab3c2690d569d4

SHA1
37cb513fabddcdbbaa2e7296b31a4bc9832e1b01

SHA256
57cfa30bb860b95b7012ed62427025959b671d270aaf67fc406fbc3c4f3c48d4

SHA512
743591e7bfe9936eee057c9d1769595d48c90ba28057d8ebd0f7299b8fcacd7b8fa50af30bd0b8b6e09f77ade16b47d6f0abb079d60e975443a57c514099ad86

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\UProof\ExcludeDictionaryEN0809.lex
Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/3756-147-0x00007FF7E1E20000-0x00007FF7E1E30000-memory.dmp

Filesize
64KB

Download
memory/3756-134-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-133-0x00007FF7E3ED0000-0x00007FF7E3EE0000-memory.dmp

Filesize
64KB

Download
memory/3756-138-0x00007FF7E3ED0000-0x00007FF7E3EE0000-memory.dmp

Filesize
64KB

Download
memory/3756-141-0x00007FF7E3ED0000-0x00007FF7E3EE0000-memory.dmp

Filesize
64KB

Download
memory/3756-140-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-136-0x00007FF7E3ED0000-0x00007FF7E3EE0000-memory.dmp

Filesize
64KB

Download
memory/3756-142-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-143-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-144-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-145-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-146-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-139-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-137-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-156-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-150-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-152-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-151-0x00007FF7E1E20000-0x00007FF7E1E30000-memory.dmp

Filesize
64KB

Download
memory/3756-153-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-154-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-155-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-149-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-172-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-173-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-177-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download
memory/3756-135-0x00007FF7E3ED0000-0x00007FF7E3EE0000-memory.dmp

Filesize
64KB

Download
memory/3756-148-0x00007FF823E50000-0x00007FF824045000-memory.dmp

Filesize
2.0MB

Download