91df75fefa6f723a3d4414d1c52ff035d2195f73c07328bc8dfed8bd0cea750f

Analysis

max time kernel
142s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 16:57

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General

Target

2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe
Size

75KB
MD5

b3b10edc9e19a61c8fcabfaf15b67858
SHA1

8204267f51bead7baa170aeb955b99953440097b
SHA256

91df75fefa6f723a3d4414d1c52ff035d2195f73c07328bc8dfed8bd0cea750f
SHA512

224ee29848924c3ca9d1205f8f1d796452b3f7dc424ee2fbe92693b7224f171f7c69b5158fbb1c957bd0846bf6d3f74429a9b56c5e8557afcf9582a626f6de3c
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1siz:X6a+SOtEvwDpjBZYvQd25

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	2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3656	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 3892 wrote to memory of 3656	3892	2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe	90
PID 3892 wrote to memory of 3656	3892	2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe	90
PID 3892 wrote to memory of 3656	3892	2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_b3b10edc9e19a61c8fcabfaf15b67858_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3892
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3656

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=3612 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:4420

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
b754ba5c6336dd8520cc389e47ef92bb

SHA1
b0fde6f6cef2ddc8589d0960f8bce1820044bba9

SHA256
6a8596b86e41395cf077cffba1ec4a3772268e4e9caa1c350f7fa553000ac7d8

SHA512
1868b300f9ae93f2bcf87a850b31b5aed50d554f2f752f9e3a2e970127cdb22f35b6467e792f6abb5c80a1eb4d8978d3fdd5f253653b890ac118363c83b14dbf

Download Submit
memory/3656-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3656-17-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3892-0-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/3892-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/3892-2-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download