21722edb67a6233676f716930b03dae0f8647a78d839c297eadd24738913a847

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 01:42

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General

Target

2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe
Size

41KB
MD5

7af809d0746d698093e820a1d7a79449
SHA1

87b642207feee28831dca098c027b2a29e937088
SHA256

21722edb67a6233676f716930b03dae0f8647a78d839c297eadd24738913a847
SHA512

e8a6855760c744fd66eff58793156f470ec501b562d9656cd2070d315ae1103c9ce26b68c34fd05854a36af90f5067aaa4ad85825fe92ddafeef56b247cd967a
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAaV:b/pYayGig5HjS3NPAu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023212-12.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	2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4756	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 4980 wrote to memory of 4756	4980	2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe	85
PID 4980 wrote to memory of 4756	4980	2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe	85
PID 4980 wrote to memory of 4756	4980	2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4980
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4756

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
2622930b6c12564cf9cc5863e74e46e6

SHA1
943ed8bf42c1f7f363cd0f4540f51a119b8b9807

SHA256
480c93b99f64958a05b8b7d23db47b23881b07682433f0b14ac3a6075585c8ab

SHA512
2e5b34315a9ce716269d3afca493a1d4c6e092ce259d12529ec5900316de163e8076222325b8568ec8fc5ec5decbb436295b06a724e6472d8271686acdb306a0

Download Submit
memory/4756-25-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4980-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4980-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4980-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download