3fd824d0be3088b39cf060b9fcf8864318ed3ac1da026f65a0c11f94f5591e67

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
15/05/2024, 15:21

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General

Target

2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe
Size

42KB
MD5

25bb91962c15d887d9f386d17591143b
SHA1

68b018e07894376dda83bf34accc393cd919aa5a
SHA256

3fd824d0be3088b39cf060b9fcf8864318ed3ac1da026f65a0c11f94f5591e67
SHA512

e219b8b167977d36e5e025ed27a6c7d41fc493af33e65528d32701a646033a82c2492a4d7268b5c27771fc7b13ac34bc880df2c5e0fdf0cd6a3d9ac0a19214f8
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqtB:bCDOw9aMDooc+vAqtB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2888-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000122ee-11.dat	CryptoLocker_rule2
behavioral1/memory/2888-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3044	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2888	2024-05-15_25bb91962c15d887d9f386d17591143b_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 2888 wrote to memory of 3044	2888	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	28
PID 2888 wrote to memory of 3044	2888	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	28
PID 2888 wrote to memory of 3044	2888	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	28
PID 2888 wrote to memory of 3044	2888	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3044

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
503d811dca545c56b0dafebe512fd151

SHA1
2a4b08cd3502bc08ffa8b21291ce68b72d0fa6f1

SHA256
19eed9686969a8010c33ad3e839391819961d52b2eb1b40e81698577c1e63e16

SHA512
d6c48acd8475bafbbd5a6f51375978d14b873362e536331778ba4a4fa35b073e1886172ee7126d9f128481dac22c8d09eeb0d3db7bc484d9e4eff07719af464c

Download Submit
memory/2888-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2888-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2888-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2888-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2888-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3044-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3044-18-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/3044-25-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/3044-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download