cryptolocker | 81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

Analysis

max time kernel
152s
max time network
156s
platform
windows10_x64
resource
win10v20210410
submitted
26-07-2021 12:39

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General

Target

81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe
Size

340KB
MD5

ffeae4a391a1d5203bd04b4161557227
SHA1

7c7013dd8def75c94828b40ffa139b6d89ec4683
SHA256

81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90
SHA512

2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

Score

10^/10

cryptolocker persistence ransomware suricata

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
suricata: ET MALWARE Zeus GameOver Possible DGA NXDOMAIN Responses
suricata

Executes dropped EXE 2 IoCs

pid	Process
3336	{34184A33-0407-212E-3320-09040709E2C2}.exe
2044	{34184A33-0407-212E-3320-09040709E2C2}.exe

Deletes itself 1 IoCs

pid	Process
3336	{34184A33-0407-212E-3320-09040709E2C2}.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	{34184A33-0407-212E-3320-09040709E2C2}.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 3336	772	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	75
PID 772 wrote to memory of 3336	772	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	75
PID 772 wrote to memory of 3336	772	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	75
PID 3336 wrote to memory of 2044	3336	{34184A33-0407-212E-3320-09040709E2C2}.exe	76
PID 3336 wrote to memory of 2044	3336	{34184A33-0407-212E-3320-09040709E2C2}.exe	76
PID 3336 wrote to memory of 2044	3336	{34184A33-0407-212E-3320-09040709E2C2}.exe	76

C:\Users\Admin\AppData\Local\Temp\81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe
"C:\Users\Admin\AppData\Local\Temp\81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:772
- 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\81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3336
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000020C
    3⤵
    - Executes dropped EXE
    PID:2044

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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