c5186a2af6da9a77837b63c90133184aa927f1268045333c3f69d5ae9a56e2f1

Analysis

max time kernel
16s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
29/04/2024, 13:31

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General

Target

2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe
Size

32KB
MD5

6b188f5813927070e5af5e9d694988ec
SHA1

5e8e1f12c003169f50b64f751b6105aa361eff28
SHA256

c5186a2af6da9a77837b63c90133184aa927f1268045333c3f69d5ae9a56e2f1
SHA512

eb94f295bbfabaf0a013fbbfb67d0e440b3b20ecab46eb25ce24fee17dfe72cb2257c5e51134cb98c892de1721241b1b95e11b59a3a4235472768d49d5d1508b
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsgRi:b/yC4GyNM01GuQMNXw2PSjSKkcJRi

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000015f7a-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2852	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
3060	2024-04-29_6b188f5813927070e5af5e9d694988ec_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
3060	2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe
2852	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 2852	3060	2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe	28
PID 3060 wrote to memory of 2852	3060	2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe	28
PID 3060 wrote to memory of 2852	3060	2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe	28
PID 3060 wrote to memory of 2852	3060	2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3060
- 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:2852

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
33KB

MD5
9d197a39ffcb6fdf4331213f87965bbc

SHA1
b64b366582c3f123334f3a09815f5eadffeda9c7

SHA256
76859ead6ee0944ffcf2b223e7b662d014b3b7ad67f2670be1ee092a0023a0b9

SHA512
99ebd8f1a8fa35933e74775181963034cc1410ae2b33ff5cbfaef0702c1640b1e09b7fca40ce369445ed68ba04ee4183824912fa1a0962fb8b744387109724c5

Download Submit
memory/2852-23-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/3060-0-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3060-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3060-8-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download