d6ca58908959b1df4ff0cf1044b83fc3b2ebf83ad287ce248f8f7f211e72aae0

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2024 17:25

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General

Target

2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe
Size

30KB
MD5

0f060c8d12055bd69846659ce7e220c1
SHA1

e3dea12610f2167ab044d8dff417638fab890dd0
SHA256

d6ca58908959b1df4ff0cf1044b83fc3b2ebf83ad287ce248f8f7f211e72aae0
SHA512

5f0f035c8fdecaf7633b3176907f699c93efe247d51eece5f476842eed0bbe7fea5b41a4891aeabfec13bc7ab0097d486d1550a1c5354ae93888a396799797b4
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznd0j:b/yC4GyNM01GuQMNXw2PSjo

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000a000000023146-12.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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3936	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 3696 wrote to memory of 3936	3696	2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe	84
PID 3696 wrote to memory of 3936	3696	2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe	84
PID 3696 wrote to memory of 3936	3696	2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_0f060c8d12055bd69846659ce7e220c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3696
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3936

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
30KB

MD5
8ec58373d7e44e7afccbaba4db460964

SHA1
ab32b2e22037e0a20ae2e71d01ca6081f8452830

SHA256
41d6b8dc4b890a36fd58770b62cf4ae808a4c82caed6c6e6552e0af5c5d33686

SHA512
d5c854e9add5afe230f6957266a1ad7e532b42e41c1bd8f6fbe367962095eb0d325940ba63f63a7c410dc9abe42a67d9e8bc5868766045df27021c426354365a

Download Submit
memory/3696-0-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/3696-1-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/3696-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3936-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download