f8b83ee5fe799e3c7d31485746f7ebf8b8f8f18904d32a6c0e919344b0bb08e9

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08-04-2024 15:39

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General

Target

2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe
Size

68KB
MD5

ad1f5f78d07a0e24749e2683c8c3d651
SHA1

61236021ccdac4c0cd2364ef6f5e63b4087a01a7
SHA256

f8b83ee5fe799e3c7d31485746f7ebf8b8f8f18904d32a6c0e919344b0bb08e9
SHA512

5571f15b8a48bcdc95b120ccd88cf553d58df8c6462343226a127de8b02c1ac0209ae0aa5bc1589098eb1386993fa8643e74079aab42297411d46ae71b912686
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU5E:DW60sllyWOtEvwDpjwF85k

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4024-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023333-13.dat	CryptoLocker_rule2
behavioral2/memory/2988-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4024-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4024-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023333-13.dat	CryptoLocker_set1
behavioral2/memory/2988-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4024-18-0x0000000000500000-0x000000000050B000-memory.dmp	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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2988	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 4024 wrote to memory of 2988	4024	2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe	95
PID 4024 wrote to memory of 2988	4024	2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe	95
PID 4024 wrote to memory of 2988	4024	2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_ad1f5f78d07a0e24749e2683c8c3d651_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4024
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2988

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=3680 --field-trial-handle=2232,i,11267738607351977302,107266978269557304,262144 --variations-seed-version /prefetch:8
1⤵
PID:4664

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
68KB

MD5
cf84f8f3f6284613084e944aee72dc99

SHA1
8e8328c7bcf4bdd7d6ea3b78c43882791ea5a9a3

SHA256
81866766fe5e835475bec97e299f7664bfaea366520a6bb19b88df7ca6e500d9

SHA512
29817e5a1ffecff81962119b2102b3a4ddb36963758b77539361ab02859b3da3b0a3c1d6939f69080b960316108082f687c73f0e35c4457a6e4e6c1dfc44ff8a

Download Submit
memory/2988-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2988-21-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2988-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4024-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4024-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4024-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4024-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4024-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download