locky | acd6287f7fa2e10f6cd00f8fc8e9d8aa6553b2e95186c3190958f5ef40259f66

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
06/03/2024, 03:10

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General

Target
b65b194c6cc134d56ba3acdcc7bd3051.exe
Size 328KB
Sample240306-dn32asba37
SHA256 acd6287f7fa2e10f6cd00f8fc8e9d8aa6553b2e95186c3190958f5ef40259f66
MD5 b65b194c6cc134d56ba3acdcc7bd3051
SHA1 98c7e593d956776addd16d0d3f4647d5d69e8fcc
SHA512 a076f13f9b9c07bbf34ea9105d63ae24c2996f1b4cb77f58c3b080e333cb4f19bcbf75d1f3bafe34ee85defed00be41fd22c7af859ca3473d96e3764da202339
SSDEEP 6144:WLTEviCT+6HQEs6fwpOqb+kO506PqR0zhIx8mN8e9X5Zlev:diCT+gzGn+tqieNfJS
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

locky locky_osiris ransomware

Malware Config

Signatures

Locky
Ransomware strain released in 2016, with advanced features like anti-analysis.
ransomware locky
Locky (Osiris variant)
Variant of the Locky ransomware seen in the wild since early 2017.
ransomware locky_osiris

Executes dropped EXE 1 IoCs

pid	Process
3064	vt2.exe

Loads dropped DLL 1 IoCs

pid	Process
1308	b65b194c6cc134d56ba3acdcc7bd3051.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\DesktopOSIRIS.bmp"	vt2.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Control Panel 2 IoCs

evasion

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Control Panel\Desktop\WallpaperStyle = "0"	vt2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Control Panel\Desktop\TileWallpaper = "0"	vt2.exe

Modifies Internet Explorer settings 1 TTPs 28 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\SearchScopes	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{5DA28B01-DB67-11EE-9D31-EA483E0BCDAF} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\SearchScopes\DownloadRetries = "2"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2488	iexplore.exe
1056	DllHost.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2488	iexplore.exe
2488	iexplore.exe
1640	IEXPLORE.EXE
1640	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1308 wrote to memory of 3064	1308	b65b194c6cc134d56ba3acdcc7bd3051.exe	28
PID 1308 wrote to memory of 3064	1308	b65b194c6cc134d56ba3acdcc7bd3051.exe	28
PID 1308 wrote to memory of 3064	1308	b65b194c6cc134d56ba3acdcc7bd3051.exe	28
PID 1308 wrote to memory of 3064	1308	b65b194c6cc134d56ba3acdcc7bd3051.exe	28
PID 3064 wrote to memory of 2488	3064	vt2.exe	33
PID 3064 wrote to memory of 2488	3064	vt2.exe	33
PID 3064 wrote to memory of 2488	3064	vt2.exe	33
PID 3064 wrote to memory of 2488	3064	vt2.exe	33
PID 2488 wrote to memory of 1640	2488	iexplore.exe	34
PID 2488 wrote to memory of 1640	2488	iexplore.exe	34
PID 2488 wrote to memory of 1640	2488	iexplore.exe	34
PID 2488 wrote to memory of 1640	2488	iexplore.exe	34
PID 3064 wrote to memory of 1216	3064	vt2.exe	36
PID 3064 wrote to memory of 1216	3064	vt2.exe	36
PID 3064 wrote to memory of 1216	3064	vt2.exe	36
PID 3064 wrote to memory of 1216	3064	vt2.exe	36

C:\Users\Admin\AppData\Local\Temp\b65b194c6cc134d56ba3acdcc7bd3051.exe
"C:\Users\Admin\AppData\Local\Temp\b65b194c6cc134d56ba3acdcc7bd3051.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1308
- C:\Users\Admin\AppData\Local\Temp\vt2.exe
  "C:\Users\Admin\AppData\Local\Temp\vt2.exe"
  2⤵
  - Executes dropped EXE
  - Sets desktop wallpaper using registry
  - Modifies Control Panel
  - Suspicious use of WriteProcessMemory
  PID:3064
- - C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe" C:\Users\Admin\DesktopOSIRIS.htm
    3⤵
    - Modifies Internet Explorer settings
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2488
  - - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2488 CREDAT:275457 /prefetch:2
      4⤵
      Modifies Internet Explorer settings
      Suspicious use of SetWindowsHookEx
      PID:1640
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C del /Q /F "C:\Users\Admin\AppData\Local\Temp\vt2.exe"
    3⤵
    PID:1216

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

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