631735e0cf0dffa85e030d2e40ab4e320964c9387d43665ae228cb214c95d43c

Analysis

max time kernel
17s
max time network
121s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
29-01-2024 04:26

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General

Target

2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe
Size

26KB
MD5

23c41bc07a58013973f34870aece1a0a
SHA1

8ad67faef1ccb13d41831c367a971066856990e7
SHA256

631735e0cf0dffa85e030d2e40ab4e320964c9387d43665ae228cb214c95d43c
SHA512

ff1a595137ab74cad787507738d49b730bff4dae441ff9641c3310e59a1f156599c2e5c8a9fdd3a0836ad9a1f3dd09af6161c0bc7b5c3f82d43d31ae21cbce8c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+L:b/yC4GyNM01GuQMNXum+L

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000015b6f-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2844	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1244	2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1244	2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe
2844	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1244 wrote to memory of 2844	1244	2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe	28
PID 1244 wrote to memory of 2844	1244	2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe	28
PID 1244 wrote to memory of 2844	1244	2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe	28
PID 1244 wrote to memory of 2844	1244	2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_23c41bc07a58013973f34870aece1a0a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1244
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
26KB

MD5
1582f59d11de43b449dd7d7cfb52348c

SHA1
ba7481136c99151faffb06e6f0fb7ffa7fdbab1f

SHA256
24f5bfd256458005509f29df4155c724c702ad9a2a38b4cb47cb62407606881c

SHA512
57c96bf5a6c1ab699c89ceb6ec2557631924e34423a5ea87f528ae91911ef017b18a2970fd9707e4bdad2531472171c0af1701960154344e125f80aa8f8a4e4f

Download Submit
memory/1244-0-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/1244-2-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/1244-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2844-21-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download