36499009f2c9940f7d63aa67d2968ac45045b9b0b3a50372e99f181d8a8d75a1

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16/05/2024, 22:30

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General

Target

2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe
Size

39KB
MD5

ed4be8e3296baf5aaac53b5aab448926
SHA1

880fc05736e96f6bee84be064efb631f2aa94eb9
SHA256

36499009f2c9940f7d63aa67d2968ac45045b9b0b3a50372e99f181d8a8d75a1
SHA512

ec027bdb5dc114db327fc355e0c1205b8da9792fef0a04f3e2924b907445bb0191625c5f842a9ec2da19fd8520daba14445cdca79652fcd69d618be46fe7fd43
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8IujdxNYLbL5m:b/yC4GyNM01GuQMNXw2PSj1Pqq8BYtm

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000a0000000233ea-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1012	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 4404 wrote to memory of 1012	4404	2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe	83
PID 4404 wrote to memory of 1012	4404	2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe	83
PID 4404 wrote to memory of 1012	4404	2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_ed4be8e3296baf5aaac53b5aab448926_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4404
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1012

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
d39d349091e6bb61f4464e58ff2f1956

SHA1
7616803c016b5f998dc2ce07ec4c1eaa78dadc14

SHA256
84ab500b1af26421732b6efb82f6d34f8b8fa35eda9e71cfc00ce9fc69a0f183

SHA512
00dfb752d7bb22575e57bc77873a0df55ddd16f9e4e38745b3ca1d7acfb72bbd21156d1cfeaf52f53c9e4d44539981eff03f46a7464269b553db7e86accd22e7

Download Submit
memory/1012-25-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4404-0-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/4404-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4404-8-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download