23cf6b93a42fbe9ca02e0753f8e4e31490e39e788ce9d6417b1c400be78c684e

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 07:23

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General

Target

2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe
Size

42KB
MD5

03ac043d0daa2d602977e0d84d809f5a
SHA1

b3f3a3fdbc409bf28438b999a0f376a8092b95a8
SHA256

23cf6b93a42fbe9ca02e0753f8e4e31490e39e788ce9d6417b1c400be78c684e
SHA512

521f0dd4064f23a1e66a7ddf1d39e603ffb2bce3151bdeefc09b3756295a22606e53a6a6adaf110405fe7136ab4d5cf8137c675614c14cbba8599b56833a7dbb
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA/:b/pYayGig5HjS3NPA/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000233d2-12.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-1-5-21-553605503-2331009851-2137262461-1000\Control Panel\International\Geo\Nation	2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3412	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 3344 wrote to memory of 3412	3344	2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe	87
PID 3344 wrote to memory of 3412	3344	2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe	87
PID 3344 wrote to memory of 3412	3344	2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_03ac043d0daa2d602977e0d84d809f5a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3412

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
e0059c5c315ae6d1c0dac645816072d1

SHA1
2533caa92f14b2ecbb48c8210f53842ee309dd26

SHA256
4b74ad2a0cab36eba588e634f4662c82d1710106db3091bbe469d4d208b8c2b9

SHA512
161227f527d5653f9680f2071c0b92d63a96e038ce31fd5561caa35a9ce5f281c50c1d944945337cdbeed168f279f066775055d28ef69366ec93f63de4d5a652

Download Submit
memory/3344-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3344-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3344-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3412-21-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download