43e47a037425c2efb68f0ba0004f7e851e8c242c5fa7ae6ade0e54fdd81e380a

Analysis

max time kernel
150s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
21-03-2023 23:12

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General

Target

APT 37 Previous Commits 1/2021년 ICT융합 스마트공장 구축 및 고도화 사업 최종감리.hwp
Size

1.4MB
MD5

b8addd3c9e0c7f1ed8d4aafcb582e755
SHA1

680373d4873b13323a52854364f7564538d50178
SHA256

beea227a91e76e197f5f82c2d92a1b657a318c97ee083603be9f05cf21f85c9a
SHA512

b732dda231b261834fa303ed411ac34e638a03feb3c787efce47d9e1c6a89ff75cb364fce13ad4b7d30e64d7054d19cb4d78595a0b703f0592179136bbb0305a
SSDEEP

24576:VlFeF06suHGJqxEvDNWuk/EuAq6W1onwl1u1CMXbhoVjrDMB9Mm3L+Ije48rEbaj:V/eFSuHG0xEvDNWj/EZZnwyzGVjcBxLO

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Modifies registry class 10 IoCs

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\hwp_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\hwp_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\.hwp	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\hwp_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\hwp_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\.hwp\ = "hwp_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\hwp_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\hwp_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

992 AcroRd32.exe
992 AcroRd32.exe
992 AcroRd32.exe

pid	process
992	AcroRd32.exe
992	AcroRd32.exe
992	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1704 wrote to memory of 576	1704	cmd.exe	rundll32.exe
PID 1704 wrote to memory of 576	1704	cmd.exe	rundll32.exe
PID 1704 wrote to memory of 576	1704	cmd.exe	rundll32.exe
PID 576 wrote to memory of 992	576	rundll32.exe	AcroRd32.exe
PID 576 wrote to memory of 992	576	rundll32.exe	AcroRd32.exe
PID 576 wrote to memory of 992	576	rundll32.exe	AcroRd32.exe
PID 576 wrote to memory of 992	576	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\APT 37 Previous Commits 1\2021년 ICT융합 스마트공장 구축 및 고도화 사업 최종감리.hwp"
1⤵
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\APT 37 Previous Commits 1\2021년 ICT융합 스마트공장 구축 및 고도화 사업 최종감리.hwp
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:576

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\APT 37 Previous Commits 1\2021년 ICT융합 스마트공장 구축 및 고도화 사업 최종감리.hwp"
3⤵
- Suspicious use of SetWindowsHookEx
PID:992

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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