40c92384d321d4728f5f8a7e86066069313b91ed9368f0fa50a55b6ec7f72a25

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
12/08/2024, 23:21

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General

Target
KRNL-REBORN/README.md
Size 305B
Sample240812-3cd1ga1dnd
SHA256 2d8ecef01e25360ebe21f5dee53a017797c5e6219e5fd041027332efb690f52f
MD5 8d250ce6aa236fecbc223ad289909ade
SHA1 f2ae9ba834da647eece945abe37885ce937d48b6
SHA512 8a346ec6f8ce14e0ce694209fed174af41f80347f8bd3c1bdb5f4e4edb1ba00bed776a9d1690bebe3776332efcf9c215de0d03c6b471e5403836e3d463214e10
MD5 SHA1 SHA512

Score

3^/10

discovery

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AcroRd32.exe

Modifies registry class 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\.md	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\.md\ = "md_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file\shell	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
752	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
752	AcroRd32.exe
752	AcroRd32.exe
752	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 1116	760	cmd.exe	29
PID 760 wrote to memory of 1116	760	cmd.exe	29
PID 760 wrote to memory of 1116	760	cmd.exe	29
PID 1116 wrote to memory of 752	1116	rundll32.exe	30
PID 1116 wrote to memory of 752	1116	rundll32.exe	30
PID 1116 wrote to memory of 752	1116	rundll32.exe	30
PID 1116 wrote to memory of 752	1116	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\README.md
1⤵
- Suspicious use of WriteProcessMemory
PID:760
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\README.md
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1116
- - 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\KRNL-REBORN\README.md"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

SharedDataEvents

Path C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Size 3KB
SHA256 02d4c25228622787d26cf6cd35cecb9091437d648be06a813e5918062fcf6f77
MD5 1a1193b85606df3d2a47685b1877e79b
SHA1 5eff3fc235a6e953b38471c1fffaca8134714ff3
SHA512 58f46dbdaba166d035edc5ea7593bd3360803a6378fff45d0253d0ae4a63fecf888ebda70ac7f7692f67d1a361ce83276b91f77922bcf8b8c90219399cfe8f5c
MD5 SHA1 SHA512

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