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
121s
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

e_nas_arm.out
Size

2.1MB
MD5

28249fc247a858d9727c860e4a484392
SHA1

37b2ee4c3f6b9976e2335421a05e4b480c09ff9d
SHA256

e8cee8eab4020e1aadd4631ed626ab54d8733f8b14d683ca943cd4e124eeef55
SHA512

af4109064b524761fc3b0b5b27ab634e9eda7c8897fe5fb5b2d39dd1b620a402eb97ce5e76d99f9a959c2c6a162a2037c398c2181d2f66d029b46d73ec7f43e4
SSDEEP

49152:RJZuecSwpeH2LTBnW01NEXTY4TumnwM7UB3:nZueanLjSumnJ70

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	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\out_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000_CLASSES\.out\ = "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\Read\command	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

2676 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2676 AcroRd32.exe
2676 AcroRd32.exe

pid	process
2676	AcroRd32.exe

pid	process
2676	AcroRd32.exe
2676	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1996 wrote to memory of 2548	1996	cmd.exe	rundll32.exe
PID 1996 wrote to memory of 2548	1996	cmd.exe	rundll32.exe
PID 1996 wrote to memory of 2548	1996	cmd.exe	rundll32.exe
PID 2548 wrote to memory of 2676	2548	rundll32.exe	AcroRd32.exe
PID 2548 wrote to memory of 2676	2548	rundll32.exe	AcroRd32.exe
PID 2548 wrote to memory of 2676	2548	rundll32.exe	AcroRd32.exe
PID 2548 wrote to memory of 2676	2548	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\e_nas_arm.out
1⤵
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\e_nas_arm.out
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2548
- - 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\e_nas_arm.out"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2676

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
a0d8f272ff1e5cd3746d538cfec50eda

SHA1
b0480ce75d92180da4cc85b5a6303865a0701c30

SHA256
3ebaa8cdf4c0e5949d24be4760ee24c731cd28005863fa8c711af6e1769d0860

SHA512
309670ca628ea2a62e0850c3fbc4455503ef0ace9a8ad486c496e8047f258eb5571b822e100fe3b1341692549e6135e091ff2c61d2bbc08a785785a2fb70a13c

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