3f44db9085c380c6eb6ba898e968ca24a6bd09dad9171e8faa318cef786435fd

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 06:33

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General

Target

2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe
Size

41KB
MD5

62b3dd4cdb594a8dea704dad07081827
SHA1

833762b9c4798c0549e7dfffb554a4fff9dc1717
SHA256

3f44db9085c380c6eb6ba898e968ca24a6bd09dad9171e8faa318cef786435fd
SHA512

7cf2c253e2a0b023acc76b9dfc5ee3372f58b9ba3f44541b341a29f3890aa60434b88ff66ed753df9126b5754a85e1f241b83e08c359fa274230a441de1fa076
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9D1:b/pYayGig5HjS3NPA9D1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023205-12.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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3244	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 3052 wrote to memory of 3244	3052	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	84
PID 3052 wrote to memory of 3244	3052	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	84
PID 3052 wrote to memory of 3244	3052	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3244

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
41KB

MD5
5fcfcf9c5ae586353775f7502b4e3f2e

SHA1
639b4dd5d55da2ee6eff5d71daa7e339d9591af8

SHA256
c9b27d9f2372f35604000591d89b3d4a71fc4836c4a897596d6922eb8177fb4d

SHA512
70927d4480660ce1eb65a6b461f5240945c312ca68e2ecad8e59a826ac3edf6c9d93e1b09dd8652004f076d9bfb3186847f29775c3ff971e846e4335bb453d75

Download Submit
memory/3052-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3052-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3052-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3244-21-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download