cryptolocker | 022728f678d8dcc6cba20147595ed4099e9c98be0582c0f67518d5664e3b8523

Resubmissions

03-03-2024 01:34

240303-by6ttsbe94 10

03-03-2024 01:31

240303-bxkj7sbe62 7

Analysis

max time kernel
151s
max time network
157s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03-03-2024 01:34

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General

Target

Ransomware/CryptoLocker.exe
Size

338KB
MD5

04fb36199787f2e3e2135611a38321eb
SHA1

65559245709fe98052eb284577f1fd61c01ad20d
SHA256

d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9
SHA512

533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444
SSDEEP

6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Deletes itself 1 IoCs

Processes:

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

pid process

3008 {34184A33-0407-212E-3320-09040709E2C2}.exe
Executes dropped EXE 2 IoCs

Processes:

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

pid process

3008 {34184A33-0407-212E-3320-09040709E2C2}.exe
2660 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

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

pid process

2748 CryptoLocker.exe
3008 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
3008	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
3008	{34184A33-0407-212E-3320-09040709E2C2}.exe
2660	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2748	CryptoLocker.exe
3008	{34184A33-0407-212E-3320-09040709E2C2}.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

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

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1650401615-1019878084-3673944445-1000\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 8 IoCs

Processes:

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

description	pid	process	target process
PID 2748 wrote to memory of 3008	2748	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2748 wrote to memory of 3008	2748	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2748 wrote to memory of 3008	2748	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2748 wrote to memory of 3008	2748	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3008 wrote to memory of 2660	3008	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3008 wrote to memory of 2660	3008	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3008 wrote to memory of 2660	3008	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3008 wrote to memory of 2660	3008	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\Ransomware\CryptoLocker.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\CryptoLocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2748

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\Ransomware\CryptoLocker.exe"
2⤵
- Deletes itself
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3008

C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
"C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
3⤵
- Executes dropped EXE
PID:2660

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
Filesize
295KB

MD5
63190a6781b2ecb8af475ad151a4788d

SHA1
5cf8f29ecb3b6668744b9fca41d4194e0f401a97

SHA256
11b29bc9bc09d7e99e325b4539749aa85f9ff80c89f5588d8485ec3bd0823cfb

SHA512
1f243941ae2ae023cbc61b03a8cf3f4137ace75250912992eb97b8943cc7c60b013a90297056ea1e61e65d3ad9f2b3826d52c09a52c5b6625518c11d773898a8

Download Submit
C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
Filesize
64KB

MD5
33b709c80f1242538786b33a91ee3e3a

SHA1
497d63fbcffacdf3a620d08d926b2da35bd2bc1a

SHA256
aa21af4043aaf1794ab26720abc7b2a5ac441f71b1c12582c1de420dbca6ca41

SHA512
6b6ab768533d851e4784666af113befccfb6aa83b716cfe8c92778d74e0cfb3c3f0929d4cc88811c8c614eb13f1c7ec757cb05f07579d2cf9f7462fb967783ba

Download Submit
\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
Filesize
338KB

MD5
04fb36199787f2e3e2135611a38321eb

SHA1
65559245709fe98052eb284577f1fd61c01ad20d

SHA256
d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

SHA512
533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

Download Submit