30803504b700ed9ae4234c952f5e548ba6e77621d0a174d1e8c9092233d0aba4

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:54

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General

Target

2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe
Size

43KB
MD5

fc13dd18936b2701de0933d767d01a8f
SHA1

57ac0ac482fa5bce959731366f9bd1c0c4cecdd1
SHA256

30803504b700ed9ae4234c952f5e548ba6e77621d0a174d1e8c9092233d0aba4
SHA512

ad4cc03c75cf5606e0833f26dc9e27e42cee01eaf3c502bad990b9c86bed90dd8c95e1ddd2c96e073682f0083529db76aa4cfe861eda42f9a19d2308f9790257
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAl:b/pYayGig5HjS3NPAl

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\retln.exe	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

Processes:

2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

4716 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4716	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe

description	pid	process	target process
PID 4352 wrote to memory of 4716	4352	2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe	retln.exe
PID 4352 wrote to memory of 4716	4352	2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe	retln.exe
PID 4352 wrote to memory of 4716	4352	2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_fc13dd18936b2701de0933d767d01a8f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:4716

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
43KB

MD5
4952479f94e195dd60c9f3ea15815316

SHA1
847ce88897ed4c4391bb0d8fa6a248564af295dc

SHA256
c955f42fe6ede93937b5321a39d97dbf411f085aff2cb9b2942c871d5b6783ed

SHA512
2e8e34ab943aab7ab0ada6d491cedef77140f9bc2207abb24b5162cabc93dec7f42921072151f17d8b5b300c7276041355b2093cdb4b8f754324e7a64184d7a8

Download Submit
memory/4352-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4352-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4352-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4716-25-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download