13b4b162002813fdacd03827f67bb6370f8556972aa6bb6fc8f7bde36f04460f

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13/07/2024, 19:31

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General

Target

mullvad_brute_gen_checker/bin/Settings/CoreSettings.json
Size

1KB
MD5

2888f69395f5635b5d55d4193cb63c4c
SHA1

5c42cf051dce7069606ec263fa85c3c8e5aad6b4
SHA256

d83733e3b67791fb40ef5debfb91424d94ed6221a456c70f1580c5150b6f562b
SHA512

9b6ff2ff30206d140514eb251ae470931886e305f6f09a09bfe9d25d608d4ccdeae30af2f5d52a92a0edf715c5372f62d3f86bcbfe9f92c6dfe93f70a6a24b4e

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-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\json_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\json_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\.json	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\.json\ = "json_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\json_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\json_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\json_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000_CLASSES\json_auto_file\shell\Read	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2560	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2560	AcroRd32.exe
2560	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 2568	2756	cmd.exe	31
PID 2756 wrote to memory of 2568	2756	cmd.exe	31
PID 2756 wrote to memory of 2568	2756	cmd.exe	31
PID 2568 wrote to memory of 2560	2568	rundll32.exe	32
PID 2568 wrote to memory of 2560	2568	rundll32.exe	32
PID 2568 wrote to memory of 2560	2568	rundll32.exe	32
PID 2568 wrote to memory of 2560	2568	rundll32.exe	32

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\mullvad_brute_gen_checker\bin\Settings\CoreSettings.json
1⤵
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\mullvad_brute_gen_checker\bin\Settings\CoreSettings.json
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2568
- - 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\mullvad_brute_gen_checker\bin\Settings\CoreSettings.json"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2560

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
8c501a5b9f2e87120f3d1e7692198d44

SHA1
6c3a86ac155dbca8bf2ab628b272216c3130f335

SHA256
53c51cc95598e34568ed556921d5a19a2db2892caeb1ecbd4aa609cbdc10a9d1

SHA512
a32f1c660176ae30f1ae97970352b9483a9876d8d0e32a21b2969ef1a83a07d3d7652a80c6e5a32016d16d380100dcfec42cf62ff8e1daeb3099c5d09e66a816

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