8604f1c36999d9f419384b1226da7648d3db699405468a0f399e15cc1036ed83

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240220-en
resource tags

arch:x64arch:x86image:win10v2004-20240220-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 11:43

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General

Target

2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe
Size

39KB
MD5

bda97fa11f49c0a13bf90d913747ba84
SHA1

c80899b6bb74cc178115debe04f1a907e4b37a94
SHA256

8604f1c36999d9f419384b1226da7648d3db699405468a0f399e15cc1036ed83
SHA512

1d6313ed3b7f1fd8928ba854767366739214f48ddd77ab4aaeac16fc06f73ec3eefafd23628ce078a2a7dab684b3d0d7f933012e91090970579b77047a0856ed
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlE2Pn:b/pYayGig5HjS3+2P

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000231e8-12.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-1-5-21-1888637039-960448630-940472005-1000\Control Panel\International\Geo\Nation	2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5012	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 720 wrote to memory of 5012	720	2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe	86
PID 720 wrote to memory of 5012	720	2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe	86
PID 720 wrote to memory of 5012	720	2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:720
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:5012

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
39KB

MD5
b7f1a137afa6ca414d1cc2f35a9c2781

SHA1
0ebeb9dc09f9b6c3574b60c72510052b688de401

SHA256
f21312942d2ebbd82195f807f5dc76a95daef2a3bfada419bf79ee5f73196f01

SHA512
1643f91b9f0b6642a155e4ae8e6b08c7754bea4fb8c57e3b44dff97e01b07cabacb77964b5e7f7a6597cae4f742ea70c043e8638b0d85b449ddf2b9604e0a427

Download Submit
memory/720-0-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/720-2-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/720-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5012-25-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download