cf30333972a124401bfbdb32ddb19dfc20668b9292c2ff9250b12871a2d1155c

Analysis

max time kernel
151s
max time network
164s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28/03/2024, 06:51

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General

Target

2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe
Size

40KB
MD5

bc1e51d94a46c4c2d8213e3cfc71715c
SHA1

54e2874e8ae2d3ae26895ee114b16b1d454d469c
SHA256

cf30333972a124401bfbdb32ddb19dfc20668b9292c2ff9250b12871a2d1155c
SHA512

8f36ee4dc3189f40f9f99a3db742b53c30e3c5dc2c9a491c6f84b6658022ec1020ad5788db7899a6c95fbb32ad2106f0611b5bdc50158aed7caff11715fa6ee3
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAI:bCDOw9aMDooc+vAI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2228-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000015c54-11.dat	CryptoLocker_rule2
behavioral1/memory/2228-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1216-25-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1216	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2228	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 1216	2228	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	28
PID 2228 wrote to memory of 1216	2228	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	28
PID 2228 wrote to memory of 1216	2228	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	28
PID 2228 wrote to memory of 1216	2228	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
40KB

MD5
cc71c3d889bb742e51d62dcccb3680cc

SHA1
36be79fda7d2c0ffded428cf6ddb6db8b12b1547

SHA256
785db2d5c59fb475c88ace227613f8d5c9d02c629a557987235684767fc7c0c7

SHA512
1f293baef3f400a41e55fe3e85d0f2faa56745b08b5fb6388dcf63c2593e67956af9dfa55f6bdd654ee8d1cb0bb87a66f65cfd034af86f07c4a7b3ccc26f3b45

Download Submit
memory/1216-17-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1216-18-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1216-25-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2228-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2228-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2228-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2228-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2228-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download