13b4b162002813fdacd03827f67bb6370f8556972aa6bb6fc8f7bde36f04460f

Analysis

max time kernel
122s
max time network
124s
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/FavoriteBlocks.json
Size

2B
MD5

d751713988987e9331980363e24189ce
SHA1

97d170e1550eee4afc0af065b78cda302a97674c
SHA256

4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
SHA512

b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

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-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\json_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\json_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\.json\ = "json_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\json_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\json_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\.json	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_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-1-5-21-940600906-3464502421-4240639183-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\json_auto_file	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2924	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2924	AcroRd32.exe
2924	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 940	2552	cmd.exe	31
PID 2552 wrote to memory of 940	2552	cmd.exe	31
PID 2552 wrote to memory of 940	2552	cmd.exe	31
PID 940 wrote to memory of 2924	940	rundll32.exe	32
PID 940 wrote to memory of 2924	940	rundll32.exe	32
PID 940 wrote to memory of 2924	940	rundll32.exe	32
PID 940 wrote to memory of 2924	940	rundll32.exe	32

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\mullvad_brute_gen_checker\bin\Settings\FavoriteBlocks.json
1⤵
- Suspicious use of WriteProcessMemory
PID:2552
- 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\FavoriteBlocks.json
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:940
- - 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\FavoriteBlocks.json"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2924

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

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Downloads

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

Filesize
3KB

MD5
fed4071f0b3cb33aded3e58acc6a7ac4

SHA1
74731bc799d968977c65717c88f2328b2db6232c

SHA256
f8caf5d25c761a2efdcd109eef7d1e6bd7f4f547d267d1480dbc72e2e5a021a6

SHA512
3df4323c5e601977f7519454a704c0e47781a145fd44ac3ffd0362a438731e9801cfe0de499fc7d4a012a1aeecff21fa1e8a7c01b8a59d33b5683028529d023e

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