45bc1f7c5ae44e54481e465049e7fbbc0740b207021ee767fa80f7d033cb605f

Analysis

max time kernel
32s
max time network
127s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
28/01/2024, 18:29

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General

Target

2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe
Size

30KB
MD5

6a7e10e5b2a4e342e667b65499914bcc
SHA1

f751629615826d94fff9abc845270cb80b051350
SHA256

45bc1f7c5ae44e54481e465049e7fbbc0740b207021ee767fa80f7d033cb605f
SHA512

1abea206981cd7d15eeafb361e1ed5b0b0d6f8b2e2861006b3ac2da275552ee6b8e9646008cf1e39c2d710fde402b85b9a2b67d1f58afa127fbfff979e57d062
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznBEfv:b/yC4GyNM01GuQMNXw2PSjKv

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012274-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2796	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2004	2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_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
2004	2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe
2796	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 2796	2004	2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe	27
PID 2004 wrote to memory of 2796	2004	2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe	27
PID 2004 wrote to memory of 2796	2004	2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe	27
PID 2004 wrote to memory of 2796	2004	2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe	27

C:\Users\Admin\AppData\Local\Temp\2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_6a7e10e5b2a4e342e667b65499914bcc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2004
- 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:2796

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
30KB

MD5
28da64ea86f67a88830d68bde5e29f8a

SHA1
a0695ac42476c818d497c897e37876c308fb4c9c

SHA256
60ff3eb03c835ac97c151da7b326d53649d21b05bafd23305fd946b6b142611a

SHA512
dcb8baa7442cbdf1dbadc193c12ea5d1b4b5807ea7dae6daa58819e5a0a815444bc53c00c6b78f7cf881b254755e25ec99060f9d685bd6aa52467a6f567fe8af

Download Submit
memory/2004-0-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2004-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2004-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2796-16-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download