b6ae71edaaeef7e8280754804e34dd75553560a6452549faca58b0653705a8b1

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16-04-2024 07:26

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General

Target

2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe
Size

74KB
MD5

16108135a5677494f690efc6570080f4
SHA1

d53440ae27201e3fa514d02f4d39ed73acb48f5b
SHA256

b6ae71edaaeef7e8280754804e34dd75553560a6452549faca58b0653705a8b1
SHA512

e61237edfbf310b829514571c983955e5b45226d4c5221dd659a087f0738488ee7cd48f856b7837cb24cddae08a34f6fab87377fd30f248533924fc703fd1f3c
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHsO:X6a+SOtEvwDpjBZYvQd2l

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000016898-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000016898-12.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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3064	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 3988 wrote to memory of 3064	3988	2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe	92
PID 3988 wrote to memory of 3064	3988	2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe	92
PID 3988 wrote to memory of 3064	3988	2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_16108135a5677494f690efc6570080f4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3064

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 --field-trial-handle=4120,i,7447082786332118630,10839110169592584063,262144 --variations-seed-version --mojo-platform-channel-handle=4144 /prefetch:8
1⤵
PID:1076

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
8f78652cba0143f47edb1a7d599a23ba

SHA1
63878c189d2032a51a2d2276461858820c2b0688

SHA256
35bee34fd03b4967aa80f852ed80874a383c8d3f4e56a3c2585590618b749cf0

SHA512
0dfe9181ec297196c221c26545e5a935485c2bf5142a98a3dfb71488f251017c964895b140eae0990fda2dfdbc70c317ee9bc796d731f28e7a5d394f7d8ff818

Download Submit
memory/3064-18-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3064-17-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3988-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3988-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3988-2-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download