40c92384d321d4728f5f8a7e86066069313b91ed9368f0fa50a55b6ec7f72a25

Resubmissions

04-08-2024 00:17

240804-ak55pszfmn 7

04-08-2024 00:15

240804-ajxryavcrf 7

Analysis

max time kernel
117s
max time network
120s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
04-08-2024 00:15

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General

Target

KRNL-REBORN/README.md
Size

305B
MD5

8d250ce6aa236fecbc223ad289909ade
SHA1

f2ae9ba834da647eece945abe37885ce937d48b6
SHA256

2d8ecef01e25360ebe21f5dee53a017797c5e6219e5fd041027332efb690f52f
SHA512

8a346ec6f8ce14e0ce694209fed174af41f80347f8bd3c1bdb5f4e4edb1ba00bed776a9d1690bebe3776332efcf9c215de0d03c6b471e5403836e3d463214e10

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

Processes:

AcroRd32.exe

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

Modifies registry class 9 IoCs

Processes:

rundll32.exe

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_auto_file\shell\Read	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	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\.md\ = "md_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000_CLASSES\md_auto_file\shell	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	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid	Process
2840	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid	Process
2840	AcroRd32.exe
2840	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	Process	procid_target
PID 2136 wrote to memory of 3016	2136	cmd.exe	31
PID 2136 wrote to memory of 3016	2136	cmd.exe	31
PID 2136 wrote to memory of 3016	2136	cmd.exe	31
PID 3016 wrote to memory of 2840	3016	rundll32.exe	32
PID 3016 wrote to memory of 2840	3016	rundll32.exe	32
PID 3016 wrote to memory of 2840	3016	rundll32.exe	32
PID 3016 wrote to memory of 2840	3016	rundll32.exe	32

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\README.md
1⤵
- Suspicious use of WriteProcessMemory
PID:2136
- 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:3016
- - 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:2840

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
5bc4d6418ea336f66785b70e7a0f2964

SHA1
b4a65c7a92dae236a4dc48b414ff8218d13b0a7d

SHA256
69ce3caf4564e186cb559126f92e4f6bc8d8d8431a4c03b1aba6b15387b7b606

SHA512
1453ff3f24a199f17ce5ed7fe7d0e2af089a26b59502fa7fd2d85ab64c7663b386ab23028a84f418aacaab11668536562fa59f49f84b0d506c392b2063b5e57c

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