82e560a078cd7bb4472d5af832a04c4bc8f1001bac97b1574efe9863d3f66550

Resubmissions

21-02-2024 19:59

240221-yqmsbafb69 10

27-02-2023 15:10

230227-sj843seb89 1

27-06-2021 20:55

210627-2nsmat5hex 10

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-02-2024 19:59

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General

Target

d_nas_arm.out
Size

2.0MB
MD5

7de2173c75f9778b9c9c20447ad4c1f8
SHA1

0bea740c49e30d3c8d58976951331068f181c453
SHA256

2cd6d4a52dbaf9e79d93492ad73dc229e06d0cee9e3327cc3bef165fae06f918
SHA512

666387bea53b85ccb8d6f5925f2c4fa69530836a58834234f6c9c5c0034997dad2270f270bea138796f7bb2010bcf2c4430bbaf10fa8a6f50b52323b84b21e18
SSDEEP

24576:T138npoIXekt5RAg6hjRofWxTRLgHykaWm/kC4szj05oFVps5RThELC7ox0Yulo7:TNWdJxNxuGWsRlW011vfH6/E6tRb

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
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\.out	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\.out\ = "out_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2604 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2604 AcroRd32.exe
2604 AcroRd32.exe

pid	process
2604	AcroRd32.exe

pid	process
2604	AcroRd32.exe
2604	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 2704 wrote to memory of 2572	2704	cmd.exe	rundll32.exe
PID 2704 wrote to memory of 2572	2704	cmd.exe	rundll32.exe
PID 2704 wrote to memory of 2572	2704	cmd.exe	rundll32.exe
PID 2572 wrote to memory of 2604	2572	rundll32.exe	AcroRd32.exe
PID 2572 wrote to memory of 2604	2572	rundll32.exe	AcroRd32.exe
PID 2572 wrote to memory of 2604	2572	rundll32.exe	AcroRd32.exe
PID 2572 wrote to memory of 2604	2572	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\d_nas_arm.out
1⤵
- Suspicious use of WriteProcessMemory
PID:2704
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\d_nas_arm.out
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2572
- - 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\d_nas_arm.out"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2604

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
b592529a3ae456bacd1f0faac4ad05b2

SHA1
c02098588f7d07ae0197d20c351a7ec638c49a12

SHA256
747544309ee210c5ac1a4a7e296af2ced83b854ba583bea42b0a479dc2b9f669

SHA512
f898e31778ea69a3ba5ab6401609922243186d1a98e9ddc945eb703dd88d7878b060ff867a4944f5b22c5ae1eddd5cedc81defd9b8910e891fe41283f364f170

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