3b5fe979adcf3882fec5e405eedeca57f53548beb5720bc793e8f5154a41b040

Analysis

max time kernel
150s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 03:43

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General

Target

2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe
Size

75KB
MD5

a3f11b144b7866c28357f53466040a96
SHA1

e48eaaa6872249551125fefbe593388ff37eb3d1
SHA256

3b5fe979adcf3882fec5e405eedeca57f53548beb5720bc793e8f5154a41b040
SHA512

71bb4f01266b8c4f52dd717b3a84e67179ee2a9b86121e9a9dfe0f42b35d2d007b751c21a0ec110127443d591808c6ab5d9191daf95bc3a2f11c2a1ce1363336
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHsoU:X6a+SOtEvwDpjBZYvQd2y

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000014738-10.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000014738-10.dat	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
1720	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
640	2024-05-07_a3f11b144b7866c28357f53466040a96_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 640 wrote to memory of 1720	640	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	28
PID 640 wrote to memory of 1720	640	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	28
PID 640 wrote to memory of 1720	640	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	28
PID 640 wrote to memory of 1720	640	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:640
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1720

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\asih.exe

Filesize
75KB

MD5
655facf5c59375e97dd7f931d86672ae

SHA1
a0f962d006b491725d828b08fd9334b25a3cd7a6

SHA256
f196cb074037520ec7e27c8a26f023d8ef948cfafb5e78c6a521071209e76636

SHA512
d03e08eec43aaabe12f7204ceb071c68aba16ba0f7f5edc34bb9e02f813e3598bb0bc18f441a29a99f78239ba4e3dfe93f62e1e10df1cf75f7a18e6dbf1676e0

Download Submit
memory/640-0-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/640-8-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/640-1-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/1720-15-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1720-22-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download