337e9c176c9d8f0ddb2becea68abc71d7661a538149fb99c4ed719fba74734c4

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 16:29

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General

Target

2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe
Size

37KB
MD5

32cc11feb7cd542d89b21b817e769018
SHA1

0fde273628cae526c437eec2fe5bc39baeb0fe04
SHA256

337e9c176c9d8f0ddb2becea68abc71d7661a538149fb99c4ed719fba74734c4
SHA512

5ef626c5cf5f31646ef3eba65a691463d28c230f047c4e92e8258dc11754bc62898a219f78cdcb4e1a642680cc633ee37c716a497d5b6f4cb37f77d781038a1a
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuVuAv:b/yC4GyNM01GuQMNXw2PSjHPbSud

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f4-12.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-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\International\Geo\Nation	2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4316	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 4396 wrote to memory of 4316	4396	2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe	89
PID 4396 wrote to memory of 4316	4396	2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe	89
PID 4396 wrote to memory of 4316	4396	2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_32cc11feb7cd542d89b21b817e769018_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4316

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
37KB

MD5
840489e6f98e1b200319333c6405b08b

SHA1
92b511e17397af90fde23394068fd6153ea4448f

SHA256
92ce3dea3c4e63663369a09a8da0802f0ec2f21cee05305d9c2774e1c324eeb9

SHA512
433c436624de9e171aec212a1066eeb01cc62ea2b7228fb82e63360bb4e388d59612b1fd31f2d60352726d2f42bc53cce68350196415eb3e22d54c50d333dead

Download Submit
memory/4316-19-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4396-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/4396-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/4396-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download