cryptolocker | d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

Reason

Machine shutdown

General

Target

CryptoLocker.exe
Size

338KB
MD5

04fb36199787f2e3e2135611a38321eb
SHA1

65559245709fe98052eb284577f1fd61c01ad20d
SHA256

d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9
SHA512

533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444
SSDEEP

6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
3480	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 2 IoCs

pid	Process
3480	{34184A33-0407-212E-3320-09040709E2C2}.exe
1548	{34184A33-0407-212E-3320-09040709E2C2}.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "221"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4992	WINWORD.EXE
4992	WINWORD.EXE

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
4992	WINWORD.EXE
4992	WINWORD.EXE
4992	WINWORD.EXE
4992	WINWORD.EXE
4992	WINWORD.EXE
4992	WINWORD.EXE
4992	WINWORD.EXE
4632	LogonUI.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4580 wrote to memory of 3480	4580	CryptoLocker.exe	91
PID 4580 wrote to memory of 3480	4580	CryptoLocker.exe	91
PID 4580 wrote to memory of 3480	4580	CryptoLocker.exe	91
PID 3480 wrote to memory of 1548	3480	{34184A33-0407-212E-3320-09040709E2C2}.exe	92
PID 3480 wrote to memory of 1548	3480	{34184A33-0407-212E-3320-09040709E2C2}.exe	92
PID 3480 wrote to memory of 1548	3480	{34184A33-0407-212E-3320-09040709E2C2}.exe	92

C:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe
"C:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4580
- C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
  "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3480
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
    3⤵
    - Executes dropped EXE
    PID:1548

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\These.docx" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4992

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1404 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:404

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa399b855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat

Filesize
202B

MD5
4566d1d70073cd75fe35acb78ff9d082

SHA1
f602ecc057a3c19aa07671b34b4fdd662aa033cc

SHA256
fe33f57205e2ebb981c4744d5a4ddc231f587a9a0589e6565c52e1051eadb0c0

SHA512
b9584ebfdd25cc588162dd6525a399c72ac03bf0c61709b96a19feba7217d840ae2c60d7b0d3b43307a2776f497a388e79ef8a646c12ae59a7f5cc4789bbf3c8

Download Submit
C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe

Filesize
338KB

MD5
04fb36199787f2e3e2135611a38321eb

SHA1
65559245709fe98052eb284577f1fd61c01ad20d

SHA256
d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

SHA512
533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

Download Submit
memory/4992-11-0x00007FF9581B0000-0x00007FF9581C0000-memory.dmp

Filesize
64KB

Download
memory/4992-7-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-9-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-10-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-8-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-12-0x00007FF9581B0000-0x00007FF9581C0000-memory.dmp

Filesize
64KB

Download
memory/4992-6-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-49-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-52-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-51-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download
memory/4992-50-0x00007FF95AB10000-0x00007FF95AB20000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads