dc10d4358c8a0cbd5869db478d0b53b0e3155ffed3560c05690d90ed23f821bd

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27/01/2024, 11:42

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General

Target

2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe
Size

34KB
MD5

d96af4a9481644ffc7dbb02894da1ff7
SHA1

fffb72018a21042f35f8a876eeaec0736e8de086
SHA256

dc10d4358c8a0cbd5869db478d0b53b0e3155ffed3560c05690d90ed23f821bd
SHA512

79ebeab04a6796f0a2213eb4e9b3476c01445489c386c8ca440b7e76d68d397f99dacbe5a0846d2c41ca61a6fe0da50f00b6368930834d1a4bf2d810274bb201
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZ1a8:b/yC4GyNM01GuQMNXw2PSj1PrV

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023211-12.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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
968	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 3560 wrote to memory of 968	3560	2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe	88
PID 3560 wrote to memory of 968	3560	2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe	88
PID 3560 wrote to memory of 968	3560	2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-27_d96af4a9481644ffc7dbb02894da1ff7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3560
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:968

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
34KB

MD5
462e2a3c75009a01fae163f594882b7b

SHA1
9e27a36677f45e74381339a1827d0ea491245f4c

SHA256
e8fbab30cf4383c19e71e84aae14671a9aeb4cd9a06b1c5726b80fb0a551c5a9

SHA512
fab7af9fea3b2f03e012fd3ff2150d12dfa0127cdb6e609c6df93b83b0a8a8a3f9f0d0748eb6211c20536b386ba344001ca34f65b12b21ac3a81062920fc3179

Download Submit
memory/968-23-0x0000000001F90000-0x0000000001F96000-memory.dmp

Filesize
24KB

Download
memory/3560-0-0x0000000000700000-0x0000000000706000-memory.dmp

Filesize
24KB

Download
memory/3560-1-0x0000000000700000-0x0000000000706000-memory.dmp

Filesize
24KB

Download
memory/3560-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download