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

25/03/2024, 20:38

25/03/2024, 20:36

Analysis

max time kernel
18s
max time network
16s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
25/03/2024, 20:45

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General

Target

Prefetch/CSRSS.EXE-F3C368CB.pf
Size

5KB
MD5

7f43a31579363a1bc4ea108a42831a4f
SHA1

9914afdca0372bd65a0854a777108f3f558d8c9c
SHA256

3605b4b1fd767413b74bd08239492fcb007662655a7bc976487c7a62018765c9
SHA512

48bdc35433d55170e7856605851f12b6698c0179fbc9eb809fb53d195b23806b8c5a327d79137fb85c8ca76f964bb7da345a0ddaf7f53318a52a0321c73abbe8
SSDEEP

96:sq+e5b9p4dS/RD7eoZAoYG7X3CNvJ0SRAAXbib8sv9xkFvQDDRReBJ9rJeB:sq+e5b9t/RvHZAVG7X3Cn0+vLHsbTDRR

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
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.pf\ = "pf_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pf_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pf_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.pf	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pf_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pf_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pf_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pf_auto_file\shell\Read\command	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2572	AcroRd32.exe
2572	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 2576	2360	cmd.exe	29
PID 2360 wrote to memory of 2576	2360	cmd.exe	29
PID 2360 wrote to memory of 2576	2360	cmd.exe	29
PID 2576 wrote to memory of 2572	2576	rundll32.exe	30
PID 2576 wrote to memory of 2572	2576	rundll32.exe	30
PID 2576 wrote to memory of 2572	2576	rundll32.exe	30
PID 2576 wrote to memory of 2572	2576	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Prefetch\CSRSS.EXE-F3C368CB.pf
1⤵
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Prefetch\CSRSS.EXE-F3C368CB.pf
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2576
- - 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\CSRSS.EXE-F3C368CB.pf"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:2572

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
9c9b69ce496f51e90967ed458c3edb29

SHA1
7892a735f44228998c5a9cf1bce775acdea63bfa

SHA256
2b052644fbe9fd415a71e1b3bbc3ce856ef7ed7184aee8669f74a42ed78c6d50

SHA512
56e019df72fb781af9136dc030d8316c90ae3ce4c0beb7a61ece39a44d9c4ee847162044f8a26b482a8b780480b521f128caddf0e6923203e7c73fe04d1d9f42

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