5316fc2cb4c54ba46a42e77e9ee387d158f0f3dc7456a0c549f9718b081c6c26

Resubmissions

28-05-2024 15:19

240528-sqcz8abb79 3

28-05-2024 15:16

240528-snkx2sbb37 3

28-05-2024 15:15

240528-sm889aaa6y 3

Analysis

max time kernel
44s
max time network
17s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28-05-2024 15:16

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General

Target

script.a3x
Size

547KB
MD5

dfa96717b69fa69d264a60b9de36f078
SHA1

b18dd41bcdc7a75a4b505cbdfb337cf19a2934d8
SHA256

493fb733897f4c3d7adf01d663e711e2e47240bfdf5b99abd230aa809f43a8cf
SHA512

5772cdac81361297d72f620e23068da8180fce09935340caaf279b6719f446ad3fd85dfc3004258e943092a73f914b84f9a12ef85630ac32410d1a7ddd3b41c7
SSDEEP

12288:NeZu+gIZHxCQ4bamk1FNTVRppgU+ehWwhz5u6+c5zzq:VqRCQ4RU7ppgK35t+cdO

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

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.a3x	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.a3x\ = "a3x_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2292 AcroRd32.exe
2292 AcroRd32.exe

pid	process
2292	AcroRd32.exe
2292	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 2856 wrote to memory of 2536	2856	cmd.exe	rundll32.exe
PID 2856 wrote to memory of 2536	2856	cmd.exe	rundll32.exe
PID 2856 wrote to memory of 2536	2856	cmd.exe	rundll32.exe
PID 2536 wrote to memory of 2292	2536	rundll32.exe	AcroRd32.exe
PID 2536 wrote to memory of 2292	2536	rundll32.exe	AcroRd32.exe
PID 2536 wrote to memory of 2292	2536	rundll32.exe	AcroRd32.exe
PID 2536 wrote to memory of 2292	2536	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\script.a3x
1⤵
- Suspicious use of WriteProcessMemory
PID:2856

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\script.a3x
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2536

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\script.a3x"
3⤵
- Suspicious use of SetWindowsHookEx
PID:2292

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Filesize
3KB

MD5
9195ffc44eb098d59e98be560c8d9abc

SHA1
58bde5ffd157217747fb7546359801cf7857a813

SHA256
ae36883ff88d7fa46078b9ce49a23976ae8c328e3a3647d27ecf877021bfbf68

SHA512
525261bded74625704676c8f6740418308a3a6805c561f5db050f34b5cdfab6626c2f2c878d10c57f543502889ec36b53c291bc70760e285667be179551f2e22

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