cryptolocker | 81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

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

Processes:

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

pid process

1192 {34184A33-0407-212E-3320-09040709E2C2}.exe
1980 {34184A33-0407-212E-3320-09040709E2C2}.exe
Deletes itself 1 IoCs

Processes:

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

pid process

1192 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

1636 81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe
1192 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1192	{34184A33-0407-212E-3320-09040709E2C2}.exe
1980	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1192	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1636	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe
1192	{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
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run	{34184A33-0407-212E-3320-09040709E2C2}.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 1636 wrote to memory of 1192	1636	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1636 wrote to memory of 1192	1636	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1636 wrote to memory of 1192	1636	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1636 wrote to memory of 1192	1636	81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1192 wrote to memory of 1980	1192	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1192 wrote to memory of 1980	1192	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1192 wrote to memory of 1980	1192	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1192 wrote to memory of 1980	1192	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe
"C:\Users\Admin\AppData\Local\Temp\81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90.sample.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1636
- 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
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1192
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000CC
    3⤵
    - Executes dropped EXE
    PID:1980

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

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

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

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

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

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

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

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

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

MD5
ffeae4a391a1d5203bd04b4161557227

SHA1
7c7013dd8def75c94828b40ffa139b6d89ec4683

SHA256
81fc45c95bdb421257645b4ff91a6afc82201d3ffe570c059994d79ff1484f90

SHA512
2621e4b60d5f962f9ddb2307f2fffe5d9e375a4872693f065f6e2a3fde4f4e8b7a4230493b7cb5a3f7dfe68a1ac3765ffc17bb7a6b543642640a64e661eaf967

Download Submit
memory/1192-61-0x0000000000000000-mapping.dmp

Download
memory/1636-59-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download
memory/1980-66-0x0000000000000000-mapping.dmp

Download

Analysis

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