cryptolocker | 81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

Analysis

max time kernel
601s
max time network
604s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
26-10-2022 22:28

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General

Target

a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe
Size

340KB
MD5

ffeae4a391a1d5203bd04b4161557227
SHA1

7c7013dd8def75c94828b40ffa139b6d89ec4683
SHA256

81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90
SHA512

2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967
SSDEEP

6144:xucUo8XEe1jP5lAtpfWgTO3x5N22vWvLRKKAX5l++SygIzt:xu3PXEe1jREVT85I2vCMX5l+ZKZ

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

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

Processes:

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

pid process

2840 {34184A33-0407-212E-3320-09040709E2C2}.exe
3592 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2840	{34184A33-0407-212E-3320-09040709E2C2}.exe
3592	{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

Processes:

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

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run	{34184A33-0407-212E-3320-09040709E2C2}.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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

Processes:

a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 3340 wrote to memory of 2840	3340	a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3340 wrote to memory of 2840	3340	a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3340 wrote to memory of 2840	3340	a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2840 wrote to memory of 3592	2840	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2840 wrote to memory of 3592	2840	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2840 wrote to memory of 3592	2840	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe
"C:\Users\Admin\AppData\Local\Temp\a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3340
- 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\a2bc3059283d7cc7bc574ce32cb6b8bfd27e02ac3810a21bd3a9b84c17f18a72_unpacked.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2840
- - 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:3592

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

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Downloads

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

Filesize
340KB

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

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

Filesize
340KB

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

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

Filesize
340KB

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

Download Submit
memory/2840-132-0x0000000000000000-mapping.dmp

Download
memory/3592-135-0x0000000000000000-mapping.dmp

Download