b3c5e464e43d7db2432f3e28de75bd0eee8fa7a2b7b6fef7134e7115d6681be3

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
25-03-2024 14:35

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General

Target

$RECYCLE.BIN/$RTQTF65.vhd
Size

6.0MB
MD5

fd4979108b9587139173f02f7f0e6797
SHA1

6db7400102360fa2644e003eaeb96315d041c36c
SHA256

e1d549111b59ebb819d83440133ee876947261f3e8c2a78594de228a77de1b8f
SHA512

52f2fb184bf01ae3b4459cf4e54891d0efe7f24b156d98f897709c9108a709d7e2bda545fdb3cf34bf07f0018d94f1e9ed357682f513478064b434f6e34d951c
SSDEEP

1536:C+PCBK4J9mILDGlGC6H9S5QZ9BiLJfhHB+ZVBGIg47x1eDBSMi+1WSxlul7W4iui:JlGC6H45QtiLJfhB+ZVBGIXcSI

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 9 IoCs

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\vhd_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\.vhd	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\vhd_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\vhd_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\vhd_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\.vhd\ = "vhd_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\vhd_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\vhd_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2664 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2664 AcroRd32.exe
2664 AcroRd32.exe

pid	process
2664	AcroRd32.exe

pid	process
2664	AcroRd32.exe
2664	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1724 wrote to memory of 2576	1724	cmd.exe	rundll32.exe
PID 1724 wrote to memory of 2576	1724	cmd.exe	rundll32.exe
PID 1724 wrote to memory of 2576	1724	cmd.exe	rundll32.exe
PID 2576 wrote to memory of 2664	2576	rundll32.exe	AcroRd32.exe
PID 2576 wrote to memory of 2664	2576	rundll32.exe	AcroRd32.exe
PID 2576 wrote to memory of 2664	2576	rundll32.exe	AcroRd32.exe
PID 2576 wrote to memory of 2664	2576	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\$RECYCLE.BIN\$RTQTF65.vhd
1⤵
- Suspicious use of WriteProcessMemory
PID:1724

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\$RECYCLE.BIN\$RTQTF65.vhd
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2576

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\$RECYCLE.BIN\$RTQTF65.vhd"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2664

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Filesize
3KB

MD5
2749900d82f4f9bafb9f033f945fbe75

SHA1
909041d4079ebca8955f8251c8c2a972884c47a7

SHA256
4d200ca42b832377f93ab5485896418003b997b2de8d4e0795250c61f7b5b551

SHA512
2992b4c2b0b7aac1afb6c0d2f2b07ad52c3f122ec91d4d6051eed5ed2138dd95147e065f34bf751a775c1a32bf099029f98006af628670091b515cc3110cc0a7

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