f5709fb50f7030ba0078864ec38276e3a53b854be7c15372852e4e1e3c5c7c68

Analysis

max time kernel
135s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 01:23

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General

Target

2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe
Size

58KB
MD5

35bff181911e528d7193ade301126c7a
SHA1

f92045992d14f037c70b9af9eee7a1915079fab8
SHA256

f5709fb50f7030ba0078864ec38276e3a53b854be7c15372852e4e1e3c5c7c68
SHA512

e851af4a04e93a501a1a167fcc016136fe0e2e2906d2fa64c77e74e116c264cbd8bea4a5e8590bd485fcae05139cac292547295f47edd02adfd70a1d2cfecec3
SSDEEP

768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLa5VccPt547/rL:V6QFElP6n+gMQMOtEvwDpjyaLccVCb/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023154-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023154-12.dat	CryptoLocker_set1

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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4628	asih.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 2304 wrote to memory of 4628	2304	2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe	84
PID 2304 wrote to memory of 4628	2304	2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe	84
PID 2304 wrote to memory of 4628	2304	2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_35bff181911e528d7193ade301126c7a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4628

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\asih.exe

Filesize
58KB

MD5
f947cb83a427950e823ff0f8d5cc49a4

SHA1
65e86d76c1a564d48a62dc50ecc7afe17f622ae8

SHA256
ea0ad189bdc4bee982969d6ab83832e2416cb11d7b68b18187c1cc8ef6434ee8

SHA512
e3ab9d6bd6fc422ab430670c748025b4cbc6d62d804f428a9a13560509e3141009c91b9cf0834e558de0a840509e436a5e8b58d1359eed5da687ee11812a928b

Download Submit
memory/2304-0-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2304-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2304-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4628-18-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4628-17-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download