195729886134376a0b59b88eca532fea76da6600e5ba62d93b662791499ece3c

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
18-02-2024 12:49

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General

Target

2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe
Size

39KB
MD5

eacadf4deac2d57fe813a41aee7a5362
SHA1

2f77bd6292ba0c6cac2c21ff0709eae5e5da44fe
SHA256

195729886134376a0b59b88eca532fea76da6600e5ba62d93b662791499ece3c
SHA512

364941622d6d9d9100f6cdf17d267fecc460d5566d28e320cb2e1c19c412397c23d5a8d8e094ccb6d3c182a19c0ef2ef3ee6c1c65c46635b1617a6dbe7e976b1
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxusFK:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZM

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023202-12.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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1884	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 2336 wrote to memory of 1884	2336	2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe	85
PID 2336 wrote to memory of 1884	2336	2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe	85
PID 2336 wrote to memory of 1884	2336	2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_eacadf4deac2d57fe813a41aee7a5362_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1884

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
8587c844d4a093fa3a8f6ed2410dea13

SHA1
ef85ac7e846e2704280975c9f16c3eb30a3783c9

SHA256
3477db051e86332ec2bd4d37fdab50173c7d5e5a3cd404f1ba704cc2888f5e22

SHA512
a138e1060c01649bdb0fa5ce962668c91e3c02ed415bab19229403c6a8a97aa8d31d1b201757c9173b8b5042aacac7727723c0f5a0784125ef8a5b86f972b777

Download Submit
memory/1884-21-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/2336-0-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2336-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2336-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download