581400c778ed58a7a85976966d2553a039da3f010e12db480b58376d3b051903

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 01:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe
Size

42KB
MD5

a9b9105f5081198d600f6578e3afa221
SHA1

d4b3e28f2a12e029bffae2e09caa4f21d7468f1d
SHA256

581400c778ed58a7a85976966d2553a039da3f010e12db480b58376d3b051903
SHA512

38f2b154e10a345e3718e1b9805ddb37793a789c3991757a656ea50e99829d94cf20b52e176aa325103d20b135760e33e7a230b95f80f317dc5dc17245ec4fa8
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9Ds:b/pYayGig5HjS3NPA9Ds

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023210-12.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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
348	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 2308 wrote to memory of 348	2308	2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe	89
PID 2308 wrote to memory of 348	2308	2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe	89
PID 2308 wrote to memory of 348	2308	2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_a9b9105f5081198d600f6578e3afa221_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2308
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:348

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

Loading Replay Monitor...

Downloads

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

Filesize
42KB

MD5
8188d07507094abc7b27defdb34037d1

SHA1
5b26ed78d7956a62843333a5fa29448774bddda7

SHA256
e185c9f89fc4c9c064a08e783439704dbc45395e24aabd037d25a2ca0a44fe0c

SHA512
35ddc3294ff904f29b075bbe2edb78496707a7dd01bf7834958a83fb73a79663b7ab377e5f21dd2b2d382eed025e2507529f687bde179eeaab90fa03c8e41de4

Download Submit
memory/348-20-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/2308-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/2308-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/2308-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download