4f1531a801c28cd32563c52ece08aa900f774bfe9e8f831a272e203343b71312

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23/04/2024, 03:59

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General

Target

2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe
Size

42KB
MD5

e58d32d7e44c73debba1ae10791474f4
SHA1

ddb9c924d5dae6187933d7500299d1bd10583cf2
SHA256

4f1531a801c28cd32563c52ece08aa900f774bfe9e8f831a272e203343b71312
SHA512

94e473035a9dc822a98208f2bed6f6e9c424830a1e25c44d0f6df580b908be3d992d0b42304dbe8559640d7f2a3c6069fdcdd24fc7e54724b816a731a7c94bfc
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAIR:bCDOw9aMDooc+vAs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1700-1-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000014120-11.dat	CryptoLocker_rule2
behavioral1/memory/1700-13-0x0000000002AB0000-0x0000000002ABA000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1700-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2388-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2388-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2388	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1700	2024-04-23_e58d32d7e44c73debba1ae10791474f4_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 1700 wrote to memory of 2388	1700	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	28
PID 1700 wrote to memory of 2388	1700	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	28
PID 1700 wrote to memory of 2388	1700	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	28
PID 1700 wrote to memory of 2388	1700	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2388

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
42KB

MD5
5d8d008abf87217970c3fada6f05faa6

SHA1
21a443efa9653c9574d8b507e1c65f996097c055

SHA256
7689160a39604d7d6e8086eb9caf2f8706d0ea75cfd8622d1bed9d123a76314b

SHA512
176187a5781fe3a33c9cef89d9eeae0a2f24a9107b5b440f915311c982a731e689fde3cfa47b91231e195d757e6baa3884c78c25cbca0e2ff43ee3273bf9bede

Download Submit
memory/1700-1-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1700-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1700-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1700-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1700-13-0x0000000002AB0000-0x0000000002ABA000-memory.dmp

Filesize
40KB

Download
memory/1700-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2388-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2388-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2388-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download