e100fbde4e3b937cca58e4cb38bfe36153d5a2b36c6795cbe839184e792f73e9

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:25

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General

Target

2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe
Size

44KB
MD5

23183eaf9884b11a3e8416ab7a28c2fa
SHA1

664852f586c0678af380cd22dd88c5c8215cc3e6
SHA256

e100fbde4e3b937cca58e4cb38bfe36153d5a2b36c6795cbe839184e792f73e9
SHA512

6cc7ddba5d6df037f449472ce9aa4c6ebb9b15793b14baea1d6868453b51f1ed9d07dea2f32fd524e0e70b7b58f571d24748d24f236eb70702065e6bb39c9344
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAV:b/pYayGig5HjS3NPAV

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:

2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

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

System Information Discovery
T1082

pid	process
956	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe

description	pid	process	target process
PID 5108 wrote to memory of 956	5108	2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe	retln.exe
PID 5108 wrote to memory of 956	5108	2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe	retln.exe
PID 5108 wrote to memory of 956	5108	2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_23183eaf9884b11a3e8416ab7a28c2fa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:956

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
45KB

MD5
e14be2a421ef059fdb39aee6e54f7c9a

SHA1
af804b2d88b14771e5c4a1d5cd86449cbc8a53f5

SHA256
c1821d95034e768e1be9f497e8f69116b50fc46a0dc1d1bdff3cc9c40d9d1d00

SHA512
c942ed744c08830a7546dd0b4b79b68526f0094549050971d62a431ba01e77eb0e67c4ad31e7f7d450ecad91ea516d63a86ad7526ae52a813dc7638539cd367b

Download Submit
memory/956-25-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/5108-0-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/5108-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5108-8-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download