7cffaaac6db1786848ddc392ffeddd3d7db50be1008e1d8729068bd0cf9a809a

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2024, 11:23

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General

Target

2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe
Size

42KB
MD5

3fa374542932327d22e2df21d195d7a0
SHA1

052ef059a09ceb0eda30533ff56d1c700b7fbd05
SHA256

7cffaaac6db1786848ddc392ffeddd3d7db50be1008e1d8729068bd0cf9a809a
SHA512

9d63f2ce1a46a7ebc9813d23beec8634d4471050f95cedf8674a3fcc989f8711889432f19320d747e384287d76e4a3819b7a668c38147408bb93194546f3c535
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9DU3:b/pYayGig5HjS3NPA9D0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e9b1-12.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2284	retln.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 2284	4308	2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe	85
PID 4308 wrote to memory of 2284	4308	2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe	85
PID 4308 wrote to memory of 2284	4308	2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_3fa374542932327d22e2df21d195d7a0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
42KB

MD5
554dc6be768504b900e2fe89ecedd345

SHA1
3a671e252703490eedbdcd5b01a20e96250ad721

SHA256
2ad9867d3e7682a9113c7a4623708979929deb297a55e5effba6ec291aefa8c4

SHA512
fa2ad79b68eb9a86be370bffdb1af4d9c71c164c9f0d4efee539ae69f1fbbeebdbc839be94b7a0d260b76d85cd1c4fcbfef1ca2a42d0f066537403840c96aadd

Download Submit
memory/2284-19-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/4308-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4308-1-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4308-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download