61d6a12a61b3136a89d22eb3d4ee03e5456e64d7c7ada5381142f8e275d52ba9

Analysis

max time kernel
152s
max time network
47s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29-11-2022 12:48

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General

Target

eteyvfyhrefyscymb/jjrjkdk.class
Size

1KB
MD5

55c7e1cbd19be12f37f285474dbe2979
SHA1

d4749e055449c0e5a683377ecbb24f2b4eb8d849
SHA256

022131a5e2c067240a928552bcf877850884ff58003bfdd250ab3e856ddde7c8
SHA512

4b18600c01e57bb920a5fb3aa99844641ce50cb47305e9620717868ea6789e1384e5d60581c0471c891f43d897a4668d7077bc338233d98744b94209df5a95f7

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
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.class	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\class_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
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\class_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
460	AcroRd32.exe
460	AcroRd32.exe
460	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 828 wrote to memory of 624	828	cmd.exe	29
PID 828 wrote to memory of 624	828	cmd.exe	29
PID 828 wrote to memory of 624	828	cmd.exe	29
PID 624 wrote to memory of 460	624	rundll32.exe	30
PID 624 wrote to memory of 460	624	rundll32.exe	30
PID 624 wrote to memory of 460	624	rundll32.exe	30
PID 624 wrote to memory of 460	624	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\eteyvfyhrefyscymb\jjrjkdk.class
1⤵
- Suspicious use of WriteProcessMemory
PID:828
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\eteyvfyhrefyscymb\jjrjkdk.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:624
- - 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\eteyvfyhrefyscymb\jjrjkdk.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:460

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/460-82-0x0000000075A11000-0x0000000075A13000-memory.dmp

Filesize
8KB

Download
memory/460-81-0x0000000000000000-mapping.dmp

Download
memory/624-76-0x0000000000000000-mapping.dmp

Download
memory/828-54-0x000007FEFB881000-0x000007FEFB883000-memory.dmp

Filesize
8KB

Download