cryptolocker | ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5

General

Target

Trojan-Ransom.Win32.Blocker.exe
Size

776KB
MD5

764c9db67ee35531d30351e6090790ea
SHA1

cfce16907d2de28580a4aa84e1331630693c9994
SHA256

ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5
SHA512

2bc4d60a90a87682adfd4c2127cce9ba08c17f0a8cabb45bda41be8793060ba0d89d2ad4ab391ecdd77354a42cb5f90c43624696cb0c280ef287903b660af09e
SSDEEP

12288:hgpSlh7IYnO8MHuBmP0xdB8S9WwxxNkS:hqYngS4wf

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Executes dropped EXE 2 IoCs

Processes:

Avywuixyxmexxtr.exeAvywuixyxmexxtr.exe

pid process

992 Avywuixyxmexxtr.exe
1708 Avywuixyxmexxtr.exe
Deletes itself 1 IoCs

Processes:

Avywuixyxmexxtr.exe

pid process

992 Avywuixyxmexxtr.exe
Loads dropped DLL 2 IoCs

Processes:

Trojan-Ransom.Win32.Blocker.exe

pid process

1380 Trojan-Ransom.Win32.Blocker.exe
1380 Trojan-Ransom.Win32.Blocker.exe

pid	process
992	Avywuixyxmexxtr.exe
1708	Avywuixyxmexxtr.exe

pid	process
992	Avywuixyxmexxtr.exe

pid	process
1380	Trojan-Ransom.Win32.Blocker.exe
1380	Trojan-Ransom.Win32.Blocker.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Avywuixyxmexxtr.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Trojan-Ransom.Win32.Blocker.exeAvywuixyxmexxtr.exe

description	pid	process	target process
PID 1380 wrote to memory of 992	1380	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1380 wrote to memory of 992	1380	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1380 wrote to memory of 992	1380	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1380 wrote to memory of 992	1380	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 992 wrote to memory of 1708	992	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 992 wrote to memory of 1708	992	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 992 wrote to memory of 1708	992	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 992 wrote to memory of 1708	992	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe

C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:992
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w11c
    3⤵
    - Executes dropped EXE
    PID:1708

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
776KB

MD5
764c9db67ee35531d30351e6090790ea

SHA1
cfce16907d2de28580a4aa84e1331630693c9994

SHA256
ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5

SHA512
2bc4d60a90a87682adfd4c2127cce9ba08c17f0a8cabb45bda41be8793060ba0d89d2ad4ab391ecdd77354a42cb5f90c43624696cb0c280ef287903b660af09e

Download Submit
C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
776KB

MD5
764c9db67ee35531d30351e6090790ea

SHA1
cfce16907d2de28580a4aa84e1331630693c9994

SHA256
ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5

SHA512
2bc4d60a90a87682adfd4c2127cce9ba08c17f0a8cabb45bda41be8793060ba0d89d2ad4ab391ecdd77354a42cb5f90c43624696cb0c280ef287903b660af09e

Download Submit
C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
776KB

MD5
764c9db67ee35531d30351e6090790ea

SHA1
cfce16907d2de28580a4aa84e1331630693c9994

SHA256
ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5

SHA512
2bc4d60a90a87682adfd4c2127cce9ba08c17f0a8cabb45bda41be8793060ba0d89d2ad4ab391ecdd77354a42cb5f90c43624696cb0c280ef287903b660af09e

Download Submit
\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
776KB

MD5
764c9db67ee35531d30351e6090790ea

SHA1
cfce16907d2de28580a4aa84e1331630693c9994

SHA256
ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5

SHA512
2bc4d60a90a87682adfd4c2127cce9ba08c17f0a8cabb45bda41be8793060ba0d89d2ad4ab391ecdd77354a42cb5f90c43624696cb0c280ef287903b660af09e

Download Submit
\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
776KB

MD5
764c9db67ee35531d30351e6090790ea

SHA1
cfce16907d2de28580a4aa84e1331630693c9994

SHA256
ea8aac95160933ae46880376807706daacee9f13728080085d727a771e7d99f5

SHA512
2bc4d60a90a87682adfd4c2127cce9ba08c17f0a8cabb45bda41be8793060ba0d89d2ad4ab391ecdd77354a42cb5f90c43624696cb0c280ef287903b660af09e

Download Submit
memory/992-79-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/992-64-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/992-66-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/992-61-0x0000000000000000-mapping.dmp

Download
memory/992-72-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/1380-54-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/1380-63-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/1380-56-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/1380-55-0x0000000075A11000-0x0000000075A13000-memory.dmp

Filesize
8KB

Download
memory/1708-70-0x0000000000000000-mapping.dmp

Download
memory/1708-75-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/1708-78-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/1708-73-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download

Analysis

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