841a98464457d2fceff8a35e6b575b1e5e0681f7232cb3c2b94c698e38960a25

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25/03/2024, 21:05

240325-zxdnnahe48 3

25/03/2024, 20:59

25/03/2024, 20:56

25/03/2024, 20:51

25/03/2024, 20:45

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Analysis

max time kernel
30s
max time network
16s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/03/2024, 20:59

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General

Target

Prefetch/TVSUKERNEL.EXE-F0367088.pf
Size

44KB
MD5

cecc9adb43efc3fa278cb75f4babcc8b
SHA1

aef2d8e6432b62e3d3dcecd02f2905fed19b1a4f
SHA256

b14974ed8861a450ed34f88538726d321eda6fba8ada5764d7f63c9631d057a7
SHA512

2147a6d8b63245f2da38a293c3756bbfc7aab3b5edacbc925ab880aa428a4423f79f7b5ad7be5be994283eb4b4afac3360bef098c93e9dbc00b4a0aa8035d0b5
SSDEEP

768:+odD7XMvxrscf2f3O0PYi0CLjO7Uwc3DB5mkkHBKLUuxu:+oVXwscf2f3RR3mHw5bkhKC

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 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\pf_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\.pf	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\.pf\ = "pf_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\pf_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\pf_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\pf_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\pf_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000_CLASSES\pf_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
2592	AcroRd32.exe
2592	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3020 wrote to memory of 2648	3020	cmd.exe	29
PID 3020 wrote to memory of 2648	3020	cmd.exe	29
PID 3020 wrote to memory of 2648	3020	cmd.exe	29
PID 2648 wrote to memory of 2592	2648	rundll32.exe	30
PID 2648 wrote to memory of 2592	2648	rundll32.exe	30
PID 2648 wrote to memory of 2592	2648	rundll32.exe	30
PID 2648 wrote to memory of 2592	2648	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Prefetch\TVSUKERNEL.EXE-F0367088.pf
1⤵
- Suspicious use of WriteProcessMemory
PID:3020
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Prefetch\TVSUKERNEL.EXE-F0367088.pf
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2648
- - 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\Prefetch\TVSUKERNEL.EXE-F0367088.pf"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:2592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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

Filesize
3KB

MD5
1690c3d940f9462caa348260d36e1ec8

SHA1
dbd52262985c1ff58815e5001f53855fddda01f1

SHA256
13349c3480102475acffa65fad7f4e888c1856b210b462a0e9864d9cd9978eb8

SHA512
69c2c377d13bf6195443f506f3e4ad3b8e7a758ffb636ddb2b50613bcc667ae0a8a39c2f4f9811fefe690201fd4eba70633beb63980986002b505c4313a47129

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