a60b7a2ef406fd853f59afb392ba91901e059cb256ae7f09de38344c55de4fa0

Analysis

max time kernel
149s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
09-06-2023 23:27

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General

Target

annelids.rcss
Size

26KB
MD5

93bf8d03489a3ba7129ec5178bfcfab7
SHA1

bdc1b559f9ae5fba8e471108c0b2e318e89de8e9
SHA256

7bb0cf4acbe858d9f8943b2dc51944053277b722eeee5298f25a68636511d0c8
SHA512

8c20ee88e0330c180c98dcbeae450fe9dff6a50f317dbfd1f0575fb718aac51f5f24e5be69231846be5edfbe992d16fc1d8864cc08b7a5c2d0bfd1aa5a867be9
SSDEEP

384:104gv6B9UbhpEI7i/jP2WcW0DJwsWJ1Mv4sL1Ex:1U6B96EI7i/jP2WcW0DJwbJ1EL2

Score

3^/10

Malware Config

Signatures

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

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

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1936 AcroRd32.exe
1936 AcroRd32.exe
1936 AcroRd32.exe

pid	process
1936	AcroRd32.exe
1936	AcroRd32.exe
1936	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1332 wrote to memory of 576	1332	cmd.exe	rundll32.exe
PID 1332 wrote to memory of 576	1332	cmd.exe	rundll32.exe
PID 1332 wrote to memory of 576	1332	cmd.exe	rundll32.exe
PID 576 wrote to memory of 1936	576	rundll32.exe	AcroRd32.exe
PID 576 wrote to memory of 1936	576	rundll32.exe	AcroRd32.exe
PID 576 wrote to memory of 1936	576	rundll32.exe	AcroRd32.exe
PID 576 wrote to memory of 1936	576	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\annelids.rcss
1⤵
- Suspicious use of WriteProcessMemory
PID:1332

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\annelids.rcss
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\annelids.rcss"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1936

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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