3271f213ec3fdda0d06e8b1c29afbe296bce5cc575d3db7a73404c77ae0a80f5

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 19:49

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General

Target

2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe
Size

40KB
MD5

38c96a18bdc51b28453f78a1878b47c4
SHA1

69288e00d5ef34ecbda0d3691aecbc3b0f226161
SHA256

3271f213ec3fdda0d06e8b1c29afbe296bce5cc575d3db7a73404c77ae0a80f5
SHA512

f37d4ceef3a7928d03b9bb9d2d0472955e6300534c03e5c0caecefd8cb686881e814430373d0110cf55e377eb2b4a49da1e6977b484d3ecf227ff358d1085ff0
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAIh:bCDOw9aMDooc+vAk

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3276-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023306-13.dat	CryptoLocker_rule2
behavioral2/memory/3276-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4460-26-0x0000000008000000-0x000000000800A000-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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4460	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 3276 wrote to memory of 4460	3276	2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe	94
PID 3276 wrote to memory of 4460	3276	2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe	94
PID 3276 wrote to memory of 4460	3276	2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_38c96a18bdc51b28453f78a1878b47c4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4460

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4008 --field-trial-handle=2228,i,17475224967547320003,13667387715861799238,262144 --variations-seed-version /prefetch:8
1⤵
PID:4996

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
40KB

MD5
a3f5f04955302620e2dd15598376de75

SHA1
bb8f1c3123b8e7f00ac85b76ca1e52aca3eae6fa

SHA256
cb33f1ccad926a0c5f815cfecc9483f9ba5895e26f9035b7b4c52356127b5521

SHA512
98b9b2ad038c79afbb9b9c4374140cbea4b3cde032dbd3e458f08d441eada64b8149e180bdbfb2b9017beb67ed611b575a8f314bcb4f3c59c76fecc5a00fc025

Download Submit
memory/3276-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3276-1-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/3276-2-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/3276-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/3276-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4460-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4460-21-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4460-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download