6e7456575c919db5233aba5bf973bd6509a40c1280063b38db75b7061adf00b5

Analysis

max time kernel
1200s
max time network
915s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
12/09/2022, 14:28

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General

Target

3C518.xz
Size

6.1MB
MD5

0088c40eeb9e821c7069169f3bd512b1
SHA1

a25e57c424743351a4727f2bf91998bd1997b8d2
SHA256

6e7456575c919db5233aba5bf973bd6509a40c1280063b38db75b7061adf00b5
SHA512

b7b3b3ffb6360f65fe61ab99b51c05ae945cdd34aa1063a1fdacda8f08968733682ad51ed5268d748933234d5c237596084ff79b6f4ab35b6e7f7dc9504dd9cb
SSDEEP

24576:66KDvVnj5Z9qj3XvrRkK8+cMaWKO+TWthXu6tqasKvdwkDI7tZzScnw+6/d0uT:6Ud

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

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\xz_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\xz_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\xz_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\xz_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\xz_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.xz	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.xz\ = "xz_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\xz_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1276	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1276	AcroRd32.exe
1276	AcroRd32.exe
1276	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 1720	1660	cmd.exe	29
PID 1660 wrote to memory of 1720	1660	cmd.exe	29
PID 1660 wrote to memory of 1720	1660	cmd.exe	29
PID 1720 wrote to memory of 1276	1720	rundll32.exe	30
PID 1720 wrote to memory of 1276	1720	rundll32.exe	30
PID 1720 wrote to memory of 1276	1720	rundll32.exe	30
PID 1720 wrote to memory of 1276	1720	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\3C518.xz
1⤵
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\3C518.xz
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1720
- - 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\3C518.xz"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1276

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1276-82-0x0000000075FB1000-0x0000000075FB3000-memory.dmp

Filesize
8KB

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memory/1660-54-0x000007FEFBCE1000-0x000007FEFBCE3000-memory.dmp

Filesize
8KB

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