8a518bd1ea46d20bfe0f9cee3d76c61dbc4bcd12c1d860ee1f37020b1e71ebb2

Analysis

max time kernel
150s
max time network
156s
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, 04:42

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General

Target

2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe
Size

42KB
MD5

77754013d63865c06df63e63b76b3fff
SHA1

29d7319630532f026762c0b38aa7a269292d5f9f
SHA256

8a518bd1ea46d20bfe0f9cee3d76c61dbc4bcd12c1d860ee1f37020b1e71ebb2
SHA512

f25e4a55241ee441f80e91742d1a1d4af48d8c194a1b864fab0517bf07869441c3dbdbba617ce1f22bbfd34323fa4a058c4d7d549117a356e7e2ef8512b5e0bf
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9Dy:b/pYayGig5HjS3NPA9Dy

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c0000000226fd-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2224	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 3608 wrote to memory of 2224	3608	2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe	86
PID 3608 wrote to memory of 2224	3608	2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe	86
PID 3608 wrote to memory of 2224	3608	2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_77754013d63865c06df63e63b76b3fff_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2224

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
cf73ebfeb11ba388e0198aa38106d30e

SHA1
dd69663e164a3d9c6d7a2dc049fa8757ba92a077

SHA256
3ec413d4d8b4d3b70393bdacf42e9fb501266fc2c5d11b9eb1911e209b482222

SHA512
7a17b5603b922215bedbfb5c79d77a0536c6b55eda8a96ca4a9824aa6fff0ab4c27e014cebf2123fe11edbdf73e43258c1f2dcc1cf27a60f64bcbe11bd7bc506

Download Submit
memory/2224-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3608-0-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/3608-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/3608-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download