1bd6aa83dff1b2d50d6437078548a08d641b688604ab88f6685742d3e96ec51c

Analysis

max time kernel
156s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20-04-2024 04:49

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General

Target

2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe
Size

74KB
MD5

c4a3ce2a6a6c692064ad031b4c02b831
SHA1

238abb9d6dc4fddf0045b2252c2e9c6cf854bd50
SHA256

1bd6aa83dff1b2d50d6437078548a08d641b688604ab88f6685742d3e96ec51c
SHA512

c4f48194535be181e46999b27065957d28baad1ce8744d0d76235b6cea4d525d40e918e0766f62894e094761d1c73321950f1a0108b460071568b1088d7af71b
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHsn:X6a+SOtEvwDpjBZYvQd2Q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023252-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023252-12.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	2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3948	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 3164 wrote to memory of 3948	3164	2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe	92
PID 3164 wrote to memory of 3948	3164	2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe	92
PID 3164 wrote to memory of 3948	3164	2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_c4a3ce2a6a6c692064ad031b4c02b831_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3948

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=4276 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:3140

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
74KB

MD5
8e0b3850d811b374f1f07bddf0a518df

SHA1
35c700df0e338c7463dfa48988e05932979cfa89

SHA256
c0f070f713a4b6b2b2b3c346a04aab64ad560989965594da8ab14e98c2c0b35c

SHA512
fd8281536c28a41dd4b66086463a90f4197721dfb942585dd4b5b9e88d7e15c9da144b9d92fbed46594c1c76a425b1252b24a4f7a727e0f7e711896e7764adb6

Download Submit
memory/3164-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3164-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3164-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download