911ce96aba1727454e86f95df4ce2adb30b07afd6b9f8813e961600cd3971df0

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
14-09-2023 08:36

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General

Target

fncfxb.au3.malware
Size

760KB
MD5

548b423833439879e2ef091a3b38fdd7
SHA1

fc7abba81f21bb68653983ce6770e3e3156ee62e
SHA256

bd8fc787abfebba8d167e9979c2ec692f861ab21ea138c3381daa852a58677be
SHA512

183df28fddd70493fb56f4654f1af30f0e046f8f04ec6aa40e8115ed2cabe1b7f1b71a9b4fe52d80f93cc30271f54c5f365b512d33b91f4ba79b3da20e541795
SSDEEP

12288:0GPp9+e8zj98hVcp64FV42p5ot4k6on9Nkt22oV64P3FmMmVxcxlMY1D:0GPplGp64FLSitoi22oV6w3FmMSxWl7J

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-1-5-21-3185155662-718608226-894467740-1000_CLASSES\malware_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\malware_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\malware_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\malware_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\malware_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\.malware	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\.malware\ = "malware_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000_CLASSES\malware_auto_file\shell\Read	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2600	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2600	AcroRd32.exe
2600	AcroRd32.exe
2600	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1252 wrote to memory of 2836	1252	cmd.exe	29
PID 1252 wrote to memory of 2836	1252	cmd.exe	29
PID 1252 wrote to memory of 2836	1252	cmd.exe	29
PID 2836 wrote to memory of 2600	2836	rundll32.exe	30
PID 2836 wrote to memory of 2600	2836	rundll32.exe	30
PID 2836 wrote to memory of 2600	2836	rundll32.exe	30
PID 2836 wrote to memory of 2600	2836	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\fncfxb.au3.malware
1⤵
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\fncfxb.au3.malware
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2836
- - 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\fncfxb.au3.malware"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2600

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
e9736d9f43a4a5420d90fd22e744f263

SHA1
4d41ffaa41004f08c66c7ba859fb035e7aca65ae

SHA256
8feb3e6bbe9b815b81770b35c763015ff44dd702d6b146b411781c3e7e69af0a

SHA512
5b4e644a3758815e45143fbfb13093f76647b48f7f35ee21712325521d7a904acd6314a99bf99c194a031df074fc5f7adc08fb1a8b7f60ed00b1242514b81067

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