61d6a12a61b3136a89d22eb3d4ee03e5456e64d7c7ada5381142f8e275d52ba9

Analysis

max time kernel
151s
max time network
50s
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/rtljlldncnqtbajsjrr.class
Size

1KB
MD5

818a60997fc48aa2c61c04fdcb941d8f
SHA1

69fd06447783f174c727f1bebc9fd95bb9e25d78
SHA256

a4b7f0a685170dfb3b71180b5288247cd9ef4b5528bc165f1b392d89c45d3490
SHA512

5c6357a7c1b07a496bbda65bcb19c0d7179eaac0f35ef1cf8225c81fbd24c09587be42ca84bdfdae309a4bb9e8fff7ea9a6afd7750dafff3d47e5ade6b4c1a45

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-1-5-21-2292972927-2705560509-2768824231-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\.class	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_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-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
868	AcroRd32.exe
868	AcroRd32.exe
868	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 616	1964	cmd.exe	29
PID 1964 wrote to memory of 616	1964	cmd.exe	29
PID 1964 wrote to memory of 616	1964	cmd.exe	29
PID 616 wrote to memory of 868	616	rundll32.exe	30
PID 616 wrote to memory of 868	616	rundll32.exe	30
PID 616 wrote to memory of 868	616	rundll32.exe	30
PID 616 wrote to memory of 868	616	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\eteyvfyhrefyscymb\rtljlldncnqtbajsjrr.class
1⤵
- Suspicious use of WriteProcessMemory
PID:1964
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\eteyvfyhrefyscymb\rtljlldncnqtbajsjrr.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:616
- - 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\rtljlldncnqtbajsjrr.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:868

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/616-76-0x0000000000000000-mapping.dmp

Download
memory/868-81-0x0000000000000000-mapping.dmp

Download
memory/868-82-0x0000000075BA1000-0x0000000075BA3000-memory.dmp

Filesize
8KB

Download
memory/1964-54-0x000007FEFBF21000-0x000007FEFBF23000-memory.dmp

Filesize
8KB

Download