fb7797d8d490f3ce33e87bf80b6d267107798fd1e127d806cbf0b15372cdd382

Analysis

max time kernel
171s
max time network
87s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
07/05/2023, 14:30

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General

Target

Kirbo.7z
Size

664.2MB
MD5

ebcbcdd2b83f35b6ca75a968a806730f
SHA1

de2961b80fca111f0dcfe6ee905962668e85dcc6
SHA256

fb7797d8d490f3ce33e87bf80b6d267107798fd1e127d806cbf0b15372cdd382
SHA512

995abf51d5e1ec7d97110265ed8a6f334870ba1c163a722a6f0e1f88c6c72314dc8aa6df1487109ef6a3f5bf1a19d3ee1a6657cccb53d9a3d6a2dfc01ff2674d
SSDEEP

12582912:G0C/OlEkV3f1hOhsaNenWreGbjXbn21+D5m9MIRS0TpbY3tLBCJlnJpruE4JXMXd:nCcVv1AhsoenWreGfiFuIRSObY9sJbVT

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 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\7z_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\7z_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\7z_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\.7z	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\7z_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000_CLASSES\7z_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1128	AcroRd32.exe
1128	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 1328	1100	cmd.exe	29
PID 1100 wrote to memory of 1328	1100	cmd.exe	29
PID 1100 wrote to memory of 1328	1100	cmd.exe	29
PID 1328 wrote to memory of 1128	1328	rundll32.exe	30
PID 1328 wrote to memory of 1128	1328	rundll32.exe	30
PID 1328 wrote to memory of 1128	1328	rundll32.exe	30
PID 1328 wrote to memory of 1128	1328	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Kirbo.7z
1⤵
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Kirbo.7z
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1328
- - 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\Kirbo.7z"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1128

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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