cryptolocker | d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

General

Target

d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe
Size

338KB
MD5

04fb36199787f2e3e2135611a38321eb
SHA1

65559245709fe98052eb284577f1fd61c01ad20d
SHA256

d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9
SHA512

533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444
SSDEEP

6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

Score

10^/10

cryptolocker discovery persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Cryptolocker family
cryptolocker

Deletes itself 1 IoCs

pid	Process
4620	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 2 IoCs

pid	Process
4620	{34184A33-0407-212E-3320-09040709E2C2}.exe
1256	{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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{34184A33-0407-212E-3320-09040709E2C2}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{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

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4556	WINWORD.EXE
4556	WINWORD.EXE

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
4556	WINWORD.EXE
4556	WINWORD.EXE
4556	WINWORD.EXE
4556	WINWORD.EXE
4556	WINWORD.EXE
4556	WINWORD.EXE
4556	WINWORD.EXE
4556	WINWORD.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 4620	3528	d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe	83
PID 3528 wrote to memory of 4620	3528	d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe	83
PID 3528 wrote to memory of 4620	3528	d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe	83
PID 4620 wrote to memory of 1256	4620	{34184A33-0407-212E-3320-09040709E2C2}.exe	84
PID 4620 wrote to memory of 1256	4620	{34184A33-0407-212E-3320-09040709E2C2}.exe	84
PID 4620 wrote to memory of 1256	4620	{34184A33-0407-212E-3320-09040709E2C2}.exe	84

C:\Users\Admin\AppData\Local\Temp\d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe
"C:\Users\Admin\AppData\Local\Temp\d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3528
- 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\d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4620
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w00000228
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1256

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Desktop\InvokeOptimize.docx" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4556

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
210B

MD5
42e0bde6dca809f6ef6b042d90f49713

SHA1
0bc3c70679d0802ae511d7139487a8c4790365a2

SHA256
5c275bc086b45274f5fd36b06ee1fd554071fb01b9bd32e71db3ec720311709c

SHA512
c45996b5fe85923adbcb86ac653c6478b171079f94737677ff569c83b56cba72c57b818166ca401c4e027cf696a1038c4167ffca12a19338c1691ad3bcbfd929

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/4556-11-0x00007FFDECD50000-0x00007FFDECD60000-memory.dmp

Filesize
64KB

Download
memory/4556-7-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-9-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-10-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-8-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-12-0x00007FFDECD50000-0x00007FFDECD60000-memory.dmp

Filesize
64KB

Download
memory/4556-6-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-53-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-54-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-56-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download
memory/4556-55-0x00007FFDEEDB0000-0x00007FFDEEDC0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads