43e47a037425c2efb68f0ba0004f7e851e8c242c5fa7ae6ade0e54fdd81e380a

Analysis

max time kernel
161s
max time network
38s
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/(20220120)2022년 총동창회 신년인사001.rar
Size

324KB
MD5

3dd12d67844b047486740405ae96f1a4
SHA1

343b56fe4945b7f3b0a8ddcde1552aa5b5dae40f
SHA256

4dd424f71c03a5866a299b21ceb936efe6d9090f5bdc7956026b32cad60f6e6b
SHA512

ab5b1b69e8a701ef8aa988a7352ea12068d719e8877e412ab2774f2f38371277d4630e86cbbbe740445136a069460f69f64b6b8e7899e7c02c6157e739f1728d
SSDEEP

6144:4VL4VbOQWSYQSWfW9i5JnWkP5O6QBKqD8w59sUrIDAW04vOYNvnfAT:M4VbOTMmw26Q7DB96DAhWdfAT

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 2 IoCs

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

vlc.exe

pid process

1536 vlc.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

vlc.exe

pid process

1536 vlc.exe
Suspicious use of FindShellTrayWindow 9 IoCs

Processes:

vlc.exe

pid process

1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
Suspicious use of SendNotifyMessage 8 IoCs

Processes:

vlc.exe

pid process

1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
1536 vlc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vlc.exe

pid process

1536 vlc.exe

pid	process
1536	vlc.exe

pid	process
1536	vlc.exe

pid	process
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe

pid	process
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe
1536	vlc.exe

pid	process
1536	vlc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1100 wrote to memory of 1928	1100	cmd.exe	rundll32.exe
PID 1100 wrote to memory of 1928	1100	cmd.exe	rundll32.exe
PID 1100 wrote to memory of 1928	1100	cmd.exe	rundll32.exe
PID 1928 wrote to memory of 1536	1928	rundll32.exe	vlc.exe
PID 1928 wrote to memory of 1536	1928	rundll32.exe	vlc.exe
PID 1928 wrote to memory of 1536	1928	rundll32.exe	vlc.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\APT 37 Previous Commits 1\(20220120)2022년 총동창회 신년인사001.rar"
1⤵
- Suspicious use of WriteProcessMemory
PID:1100

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\(20220120)2022년 총동창회 신년인사001.rar
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1928

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\AppData\Local\Temp\APT 37 Previous Commits 1\(20220120)2022년 총동창회 신년인사001.rar"
3⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:1536

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

Replay Monitor

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Downloads

memory/1536-83-0x000000013F510000-0x000000013F608000-memory.dmp

Filesize
992KB

Download
memory/1536-84-0x000007FEFADB0000-0x000007FEFADE4000-memory.dmp

Filesize
208KB

Download
memory/1536-85-0x000007FEF63E0000-0x000007FEF6694000-memory.dmp

Filesize
2.7MB

Download
memory/1536-86-0x000007FEFB230000-0x000007FEFB248000-memory.dmp

Filesize
96KB

Download
memory/1536-87-0x000007FEFAD00000-0x000007FEFAD17000-memory.dmp

Filesize
92KB

Download
memory/1536-88-0x000007FEFACE0000-0x000007FEFACF1000-memory.dmp

Filesize
68KB

Download
memory/1536-89-0x000007FEFACB0000-0x000007FEFACC7000-memory.dmp

Filesize
92KB

Download
memory/1536-90-0x000007FEFAC90000-0x000007FEFACA1000-memory.dmp

Filesize
68KB

Download
memory/1536-91-0x000007FEFAC70000-0x000007FEFAC8D000-memory.dmp

Filesize
116KB

Download
memory/1536-92-0x000007FEFAAD0000-0x000007FEFAAE1000-memory.dmp

Filesize
68KB

Download
memory/1536-93-0x000007FEF6160000-0x000007FEF6360000-memory.dmp

Filesize
2.0MB

Download
memory/1536-94-0x000007FEFAA90000-0x000007FEFAACF000-memory.dmp

Filesize
252KB

Download
memory/1536-95-0x000007FEFAA60000-0x000007FEFAA81000-memory.dmp

Filesize
132KB

Download
memory/1536-96-0x000007FEFAA40000-0x000007FEFAA58000-memory.dmp

Filesize
96KB

Download
memory/1536-99-0x000007FEFA770000-0x000007FEFA781000-memory.dmp

Filesize
68KB

Download
memory/1536-98-0x000007FEFA790000-0x000007FEFA7A1000-memory.dmp

Filesize
68KB

Download
memory/1536-97-0x000007FEF3850000-0x000007FEF48FB000-memory.dmp

Filesize
16.7MB

Download
memory/1536-100-0x000007FEFA750000-0x000007FEFA761000-memory.dmp

Filesize
68KB

Download
memory/1536-101-0x000007FEFA730000-0x000007FEFA74B000-memory.dmp

Filesize
108KB

Download
memory/1536-102-0x000007FEFA710000-0x000007FEFA721000-memory.dmp

Filesize
68KB

Download
memory/1536-107-0x000007FEF7130000-0x000007FEF7141000-memory.dmp

Filesize
68KB

Download
memory/1536-106-0x000007FEF60F0000-0x000007FEF615F000-memory.dmp

Filesize
444KB

Download
memory/1536-105-0x000007FEF67E0000-0x000007FEF6847000-memory.dmp

Filesize
412KB

Download
memory/1536-104-0x000007FEF7150000-0x000007FEF7180000-memory.dmp

Filesize
192KB

Download
memory/1536-103-0x000007FEFA6F0000-0x000007FEFA708000-memory.dmp

Filesize
96KB

Download
memory/1536-108-0x000007FEF6090000-0x000007FEF60E6000-memory.dmp

Filesize
344KB

Download
memory/1536-109-0x000007FEF63B0000-0x000007FEF63D8000-memory.dmp

Filesize
160KB

Download
memory/1536-110-0x000007FEF6060000-0x000007FEF6084000-memory.dmp

Filesize
144KB

Download
memory/1536-111-0x000007FEF7110000-0x000007FEF7127000-memory.dmp

Filesize
92KB

Download
memory/1536-112-0x000007FEF6030000-0x000007FEF6053000-memory.dmp

Filesize
140KB

Download
memory/1536-113-0x000007FEF6010000-0x000007FEF6021000-memory.dmp

Filesize
68KB

Download
memory/1536-114-0x000007FEF5FF0000-0x000007FEF6002000-memory.dmp

Filesize
72KB

Download
memory/1536-115-0x000007FEF5FC0000-0x000007FEF5FE1000-memory.dmp

Filesize
132KB

Download
memory/1536-116-0x000007FEF5FA0000-0x000007FEF5FB3000-memory.dmp

Filesize
76KB

Download
memory/1536-117-0x000007FEF5F80000-0x000007FEF5F92000-memory.dmp

Filesize
72KB

Download
memory/1536-118-0x000007FEF5E40000-0x000007FEF5F7B000-memory.dmp

Filesize
1.2MB

Download
memory/1536-119-0x000007FEF5E10000-0x000007FEF5E3C000-memory.dmp

Filesize
176KB

Download
memory/1536-120-0x000007FEF5C50000-0x000007FEF5E02000-memory.dmp

Filesize
1.7MB

Download
memory/1536-121-0x000007FEF5BF0000-0x000007FEF5C4C000-memory.dmp

Filesize
368KB

Download
memory/1536-122-0x000007FEF5BD0000-0x000007FEF5BE1000-memory.dmp

Filesize
68KB

Download
memory/1536-123-0x000007FEF5B30000-0x000007FEF5BC7000-memory.dmp

Filesize
604KB

Download
memory/1536-124-0x000007FEF5A40000-0x000007FEF5A52000-memory.dmp

Filesize
72KB

Download
memory/1536-125-0x000007FEF5680000-0x000007FEF58B1000-memory.dmp

Filesize
2.2MB

Download
memory/1536-126-0x000007FEF5560000-0x000007FEF5672000-memory.dmp

Filesize
1.1MB

Download
memory/1536-127-0x000007FEF5960000-0x000007FEF5995000-memory.dmp

Filesize
212KB

Download
memory/1536-128-0x000007FEF5930000-0x000007FEF5955000-memory.dmp

Filesize
148KB

Download
memory/1536-129-0x000007FEF5910000-0x000007FEF5921000-memory.dmp

Filesize
68KB

Download
memory/1536-130-0x000007FEF5410000-0x000007FEF5471000-memory.dmp

Filesize
388KB

Download
memory/1536-131-0x000007FEF4F80000-0x000007FEF4F91000-memory.dmp

Filesize
68KB

Download
memory/1536-132-0x000007FEF4F60000-0x000007FEF4F72000-memory.dmp

Filesize
72KB

Download
memory/1536-133-0x000007FEF4F40000-0x000007FEF4F53000-memory.dmp

Filesize
76KB

Download
memory/1536-134-0x000007FEF4EA0000-0x000007FEF4F3F000-memory.dmp

Filesize
636KB

Download
memory/1536-135-0x000007FEF4E10000-0x000007FEF4E21000-memory.dmp

Filesize
68KB

Download
memory/1536-138-0x000007FEF4B00000-0x000007FEF4B11000-memory.dmp

Filesize
68KB

Download
memory/1536-137-0x000007FEF4B20000-0x000007FEF4B31000-memory.dmp

Filesize
68KB

Download
memory/1536-136-0x000007FEF4B40000-0x000007FEF4C42000-memory.dmp

Filesize
1.0MB

Download
memory/1536-139-0x000007FEF4AE0000-0x000007FEF4AF1000-memory.dmp

Filesize
68KB

Download
memory/1536-140-0x000007FEF4AC0000-0x000007FEF4AD2000-memory.dmp

Filesize
72KB

Download
memory/1536-141-0x000007FEF4A50000-0x000007FEF4A68000-memory.dmp

Filesize
96KB

Download
memory/1536-142-0x000007FEF4A30000-0x000007FEF4A46000-memory.dmp

Filesize
88KB

Download
memory/1536-143-0x000007FEF4A00000-0x000007FEF4A29000-memory.dmp

Filesize
164KB

Download
memory/1536-144-0x000007FEF49E0000-0x000007FEF49F2000-memory.dmp

Filesize
72KB

Download
memory/1536-145-0x000007FEF49C0000-0x000007FEF49D1000-memory.dmp

Filesize
68KB

Download
memory/1536-146-0x000007FEF49A0000-0x000007FEF49B1000-memory.dmp

Filesize
68KB

Download