cryptolocker | c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

Resubmissions

09-09-2024 07:59

240909-jvl91s1bpb 10

09-09-2024 07:57

240909-jtpnra1ble 3

Analysis

max time kernel
20s
max time network
20s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
09-09-2024 07:59

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General

Target

Vcffipzmnipbxzdl.exe
Size

827KB
MD5

7f9c454a2e016e533e181d53eba113bc
SHA1

694dc7713537a7237030f7623881423fcb8d8c5c
SHA256

c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378
SHA512

6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110
SSDEEP

12288:06NINoPgXqvRyq5E3R18y0kQzX3EL1TdB0JUsoSfsJuRqQy5d5t:06iWP9JAR18ycD3ErB2rs8MQy5

Score

10^/10

cryptolocker discovery persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
2136	Avywuixyxmexxtr.exe

Executes dropped EXE 2 IoCs

pid	Process
2136	Avywuixyxmexxtr.exe
2888	Avywuixyxmexxtr.exe

Loads dropped DLL 3 IoCs

pid	Process
1288	Vcffipzmnipbxzdl.exe
1288	Vcffipzmnipbxzdl.exe
2136	Avywuixyxmexxtr.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.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	Avywuixyxmexxtr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Vcffipzmnipbxzdl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 2136	1288	Vcffipzmnipbxzdl.exe	28
PID 1288 wrote to memory of 2136	1288	Vcffipzmnipbxzdl.exe	28
PID 1288 wrote to memory of 2136	1288	Vcffipzmnipbxzdl.exe	28
PID 1288 wrote to memory of 2136	1288	Vcffipzmnipbxzdl.exe	28
PID 2136 wrote to memory of 2888	2136	Avywuixyxmexxtr.exe	29
PID 2136 wrote to memory of 2888	2136	Avywuixyxmexxtr.exe	29
PID 2136 wrote to memory of 2888	2136	Avywuixyxmexxtr.exe	29
PID 2136 wrote to memory of 2888	2136	Avywuixyxmexxtr.exe	29

C:\Users\Admin\AppData\Local\Temp\Vcffipzmnipbxzdl.exe
"C:\Users\Admin\AppData\Local\Temp\Vcffipzmnipbxzdl.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\Vcffipzmnipbxzdl.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w12c
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
827KB

MD5
7f9c454a2e016e533e181d53eba113bc

SHA1
694dc7713537a7237030f7623881423fcb8d8c5c

SHA256
c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

SHA512
6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

Download Submit
memory/1288-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

Filesize
1024KB

Download
memory/1288-2-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/1288-14-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/2136-16-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/2136-19-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download
memory/2136-28-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download
memory/2136-29-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/2888-25-0x0000000000690000-0x0000000000790000-memory.dmp

Filesize
1024KB

Download
memory/2888-24-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/2888-31-0x0000000000690000-0x0000000000790000-memory.dmp

Filesize
1024KB

Download
memory/2888-30-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads