61b48ebccdcb456be0bad75ce41f9d9184a2d05368fae5e5d65dcf950f55d716

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
30-05-2024 03:32

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General

Target

2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe
Size

42KB
MD5

174d1c9e4c3eb8995b1ba8d3f5f4154c
SHA1

3a62742930f8d0183505bbc4df6aef0fb334067e
SHA256

61b48ebccdcb456be0bad75ce41f9d9184a2d05368fae5e5d65dcf950f55d716
SHA512

2c5aae439e5ebfde1097c1b3daaac832fb61d83fd25269e4248588bb78dc8fa2978edc0c63e5521b4d64a206476ae0166beaf8298a06d034510a54d243fb00e2
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyZ:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZK

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000022f51-12.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	2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4772	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 1428 wrote to memory of 4772	1428	2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe	83
PID 1428 wrote to memory of 4772	1428	2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe	83
PID 1428 wrote to memory of 4772	1428	2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_174d1c9e4c3eb8995b1ba8d3f5f4154c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1428
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4772

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
42KB

MD5
f24b071bfa4e6c4e8da29bb6e07fa6bc

SHA1
40e0a465e940a5808088b465965dbaf91734dbe4

SHA256
27bc9022fa5ba643ba5de9a2ca49553e5e0af4a5c77ffdcaae2cb2dad7098abc

SHA512
7f10231e01fc916a1c35a31c13a9c99bdf1b0a76525bc53a3057f828d0ccfa45f4950fa9e890c066b0e45c2c8f892c9003cb035c3c6fc05e5979f9cdbc5844c5

Download Submit
memory/1428-0-0x0000000001FA0000-0x0000000001FA6000-memory.dmp

Filesize
24KB

Download
memory/1428-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1428-8-0x0000000001FA0000-0x0000000001FA6000-memory.dmp

Filesize
24KB

Download
memory/4772-25-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download