146b1f858b0871748d228a23b37c30b2235ce99f224156c46e17eb454562b1cb

Analysis

max time kernel
143s
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
21-05-2024 04:31

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General

Target

2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe
Size

50KB
MD5

18540a33b182171daaf5d583e0855849
SHA1

487034b21adc0e69517c83bc210e3778abd34af7
SHA256

146b1f858b0871748d228a23b37c30b2235ce99f224156c46e17eb454562b1cb
SHA512

bc81c3318eedca71ac40ca4c2c7f821f8527398faa4808a76f608218efdc416589c9d5a624a86662dd55793ddc46d7ec2dd1e836b5bf79dcb13be4fc03a47c4d
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaaEqbIu55id3AMWZUB:X6QFElP6n+gJQMOtEvwDpjB0GIWiWLqB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002326a-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002326a-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	2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2360	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 4616 wrote to memory of 2360	4616	2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe	91
PID 4616 wrote to memory of 2360	4616	2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe	91
PID 4616 wrote to memory of 2360	4616	2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_18540a33b182171daaf5d583e0855849_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2360

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=4388 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:4388

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
51KB

MD5
119367474331ec70c7748f6fe69c1bb4

SHA1
a81233ed885e330257a0d2d76f55802a487bdd83

SHA256
bd683c9bffce948570e0a5efcc0a25f03482ade05b22e0605d260a1f0bb8c3c7

SHA512
06a959baeeb4757f00bb0dcda242dbb02098b7352361c3a3cc340673d50da52c9a0aca11574735d00b996348c476601fdc0638a3e637bef48b85fd50745cd3e9

Download Submit
memory/2360-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2360-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4616-0-0x0000000002280000-0x0000000002286000-memory.dmp

Filesize
24KB

Download
memory/4616-1-0x0000000002280000-0x0000000002286000-memory.dmp

Filesize
24KB

Download
memory/4616-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download