3b5fe979adcf3882fec5e405eedeca57f53548beb5720bc793e8f5154a41b040

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07-05-2024 03:43

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General

Target

2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe
Size

75KB
MD5

a3f11b144b7866c28357f53466040a96
SHA1

e48eaaa6872249551125fefbe593388ff37eb3d1
SHA256

3b5fe979adcf3882fec5e405eedeca57f53548beb5720bc793e8f5154a41b040
SHA512

71bb4f01266b8c4f52dd717b3a84e67179ee2a9b86121e9a9dfe0f42b35d2d007b751c21a0ec110127443d591808c6ab5d9191daf95bc3a2f11c2a1ce1363336
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHsoU:X6a+SOtEvwDpjBZYvQd2y

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023227-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023227-12.dat	CryptoLocker_set1

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
536	asih.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 4476 wrote to memory of 536	4476	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	89
PID 4476 wrote to memory of 536	4476	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	89
PID 4476 wrote to memory of 536	4476	2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_a3f11b144b7866c28357f53466040a96_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:536

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=4220 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:3572

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\asih.exe

Filesize
75KB

MD5
655facf5c59375e97dd7f931d86672ae

SHA1
a0f962d006b491725d828b08fd9334b25a3cd7a6

SHA256
f196cb074037520ec7e27c8a26f023d8ef948cfafb5e78c6a521071209e76636

SHA512
d03e08eec43aaabe12f7204ceb071c68aba16ba0f7f5edc34bb9e02f813e3598bb0bc18f441a29a99f78239ba4e3dfe93f62e1e10df1cf75f7a18e6dbf1676e0

Download Submit
memory/536-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/536-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4476-0-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4476-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4476-2-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download