829d348eb2637386211bfe31b9ce1cca1c545e3a18a60bf20513a969fe97596b

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
30/05/2024, 17:24

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Gasai.pyc
Size

1.2MB
MD5

3342f7d8b8e1fab88c5bf9e9458c79c6
SHA1

a7870442e581dd5f646170275067aa1f202233ba
SHA256

2d4d9c0c2e4df64e89146b8f55f71089503f169a857f75cd9f358959157352bd
SHA512

0b927a0db9af578b56df24b9692299a7d894d904adf1406f0dd3ff6e2c3853c405cba8c5da5cf33f6094d0cdc8e2e81b4789f809659ab0db45f102406be1bd85
SSDEEP

24576:mSrh7pGIEckPfMzQX6b8rL7nPb24J+gerw2hPWFyBnQv6w:mINy6QXGCfT2w+R9Vw

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-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.pyc	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\pyc_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\pyc_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2720	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2720	AcroRd32.exe
2720	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 756 wrote to memory of 1880	756	cmd.exe	29
PID 756 wrote to memory of 1880	756	cmd.exe	29
PID 756 wrote to memory of 1880	756	cmd.exe	29
PID 1880 wrote to memory of 2720	1880	rundll32.exe	30
PID 1880 wrote to memory of 2720	1880	rundll32.exe	30
PID 1880 wrote to memory of 2720	1880	rundll32.exe	30
PID 1880 wrote to memory of 2720	1880	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Gasai.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:756
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Gasai.pyc
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1880
- - 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\Gasai.pyc"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2720

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

Loading Replay Monitor...

Downloads

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

Filesize
3KB

MD5
1677224eaf4e831c3162baed15d04393

SHA1
05f7ee0e4dabf481fb30862dcac69d2786fbed8d

SHA256
592935b70c2306f2eb20a2944c0fd79eb72b6cf7c35dd3f0473f8ad4d0ca491c

SHA512
76f6390e1acb7c41925a4707a0460416a35ac0029621d90b563480d9f7bdd6af08fcf99903f0296346e522df69cf2a69b871581fbac9319be899cf4e2596ccab

Download Submit