66b13fad78119e5cfb1933fba5effb8f2dbeae76bbdf21868b5ab2167567be80

Analysis

max time kernel
102s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
13/07/2024, 17:49

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General

Target

AA.class
Size

2KB
MD5

1fbf18be86e21ff3f0512ce306d582c4
SHA1

a7be573abe48068d7d8e1b00f2d4a9414b7949d4
SHA256

8a362eb0e640142626968e0b52c4a72e2d362197ee8a32e3e85db0d9f9ff9c13
SHA512

f131e24d333acabea8539a650a3981766eac56891cf0114c87b81c508541f653f8509877e018ad436e46897acb401c5395a6fdc4725c77e79fc91736cba3d8a3

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-1-5-21-2660163958-4080398480-1122754539-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\class_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\.class	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3000	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3000	AcroRd32.exe
3000	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2848	3068	cmd.exe	30
PID 3068 wrote to memory of 2848	3068	cmd.exe	30
PID 3068 wrote to memory of 2848	3068	cmd.exe	30
PID 2848 wrote to memory of 3000	2848	rundll32.exe	31
PID 2848 wrote to memory of 3000	2848	rundll32.exe	31
PID 2848 wrote to memory of 3000	2848	rundll32.exe	31
PID 2848 wrote to memory of 3000	2848	rundll32.exe	31

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\AA.class
1⤵
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\AA.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2848
- - 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\AA.class"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:3000

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
2b8c5607bb38ed6673ae0c2f771abed3

SHA1
0116a9a062d66d7e582e798e0ff148131d9c15fc

SHA256
9085c210df4a6b69a291a063a71e855fecdb51abacd05289adf35c6074de5721

SHA512
094777ff846324b52c4fde92f062521dd1fb504f9f5a03d44e5d26a29febeffa20d60840c11b8307279150c4866b4e8ba51742dda936a5e8bea5242ce0761af1

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