cryptolocker | 58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
30-03-2024 19:47

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General

Target

58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe
Size

390KB
MD5

0d0777308a101c3f1c581456edf1430e
SHA1

cd291eb3a623d22cf5e1dffa074c25ee6faf1f2a
SHA256

58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97
SHA512

53658701ecd98b88f37951fd8d289f96e99a06b0dee673d10fd49fdd9d2b61d536df41cfa77f386a389709e9f5add9e88378a05b8f3baf834955c0fae3739c48
SSDEEP

6144:EWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCcVEpSkg:EWkEuCaNT85I2vCMX5l+ZRvnVEpw

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

2844 {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

2844 {34184A33-0407-212E-3320-09040709E2C2}.exe
2540 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

1516 58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe
2844 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2844	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2844	{34184A33-0407-212E-3320-09040709E2C2}.exe
2540	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1516	58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe
2844	{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-1-5-21-2248906074-2862704502-246302768-1000\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:

58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 1516 wrote to memory of 2844	1516	58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1516 wrote to memory of 2844	1516	58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1516 wrote to memory of 2844	1516	58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1516 wrote to memory of 2844	1516	58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2844 wrote to memory of 2540	2844	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2844 wrote to memory of 2540	2844	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2844 wrote to memory of 2540	2844	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2844 wrote to memory of 2540	2844	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe
"C:\Users\Admin\AppData\Local\Temp\58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1516
- 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\58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2844
- - 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:2540

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

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

Filesize
390KB

MD5
0d0777308a101c3f1c581456edf1430e

SHA1
cd291eb3a623d22cf5e1dffa074c25ee6faf1f2a

SHA256
58cbb88d66fa9414dea87d5f801e34c0bffe1a1dadf5d579ecd57b22b0806f97

SHA512
53658701ecd98b88f37951fd8d289f96e99a06b0dee673d10fd49fdd9d2b61d536df41cfa77f386a389709e9f5add9e88378a05b8f3baf834955c0fae3739c48

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