483468d6f2d273857609cde0edee2e990f6745caa5ab394daa67a945239ab11c

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 04:00

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General

Target

2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe
Size

41KB
MD5

78f2b038b58f24ad81ea00ff70c76ce5
SHA1

9cd5a45f3593313d7844bec675747738dd6c995a
SHA256

483468d6f2d273857609cde0edee2e990f6745caa5ab394daa67a945239ab11c
SHA512

b9886984d21f54e7df8c8eb1c8f0c89aa80d03ebaa3e2813197abad59bd13f532418a841fbaf113bc71ea455df2e04772d14aced648e4e4d04ef82f9fd9332fc
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAyt:bCDOw9aMDooc+vAE

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1572-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_rule2
behavioral2/memory/1572-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4408-26-0x0000000008000000-0x000000000800A000-memory.dmp	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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4408	lossy.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 1572 wrote to memory of 4408	1572	2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe	85
PID 1572 wrote to memory of 4408	1572	2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe	85
PID 1572 wrote to memory of 4408	1572	2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_78f2b038b58f24ad81ea00ff70c76ce5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1572
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4408

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\lossy.exe

Filesize
41KB

MD5
7794c467a56888fdeac9a3e7236e7e74

SHA1
00e2f228c48f400dbc35d2854596d033ea3039b0

SHA256
a159b43a0c96608a38d89af116ed8c747b629f1d88dc708c33558d8771a10a6e

SHA512
e0c77af417fb0f5ab89c7d6667d941e1ea32ff66a086423249f42358eedd8545f5a49cdd9ffd0863f63a98667932560c74429e409fe45d45ad8c297f75796cc8

Download Submit
memory/1572-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1572-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1572-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1572-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/1572-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4408-20-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4408-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4408-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download