831ac79ed62ae4688653129acbbf95097c7aa79b8e2e65f4024acd4c645569e1

Resubmissions

13/03/2023, 03:09

230313-dnp5faad4t 3

13/03/2023, 03:06

230313-dl3yhsgc59 3

Analysis

max time kernel
31s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
13/03/2023, 03:09

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General

Target

activity-stream.discovery_stream.json.tmp
Size

150KB
MD5

f01d9d69f04ed1f2fa8bb865e9187e72
SHA1

2b56b9a6ff4c98e6ffb09202f2cb985538abd4ac
SHA256

831ac79ed62ae4688653129acbbf95097c7aa79b8e2e65f4024acd4c645569e1
SHA512

bd37eecfcd8c84f172fc9997b7c9867308375f4d14f7eeeae105e45017571dfba78cdc732f2acd42df3519d90c4d73e4019ccda69e5786d48870f9dfeaa40f3e
SSDEEP

3072:hcc1cMdCafCAhcVzG/CmCWo1GpCoGvcG4+ZcoF:hcMcMF/cu6U+ZcoF

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 12 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell\open	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\.tmp\ = "tmp_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\.tmp	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell\edit	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\tmp_auto_file\shell\edit\command	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1400 wrote to memory of 268	1400	cmd.exe	29
PID 1400 wrote to memory of 268	1400	cmd.exe	29
PID 1400 wrote to memory of 268	1400	cmd.exe	29
PID 268 wrote to memory of 1188	268	rundll32.exe	30
PID 268 wrote to memory of 1188	268	rundll32.exe	30
PID 268 wrote to memory of 1188	268	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\activity-stream.discovery_stream.json.tmp
1⤵
- Suspicious use of WriteProcessMemory
PID:1400
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\activity-stream.discovery_stream.json.tmp
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\activity-stream.discovery_stream.json.tmp
    3⤵
    PID:1188

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

Windows 7 deprecation

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