db5dac3193c73835fd7bf0d4ad2d921a7eddd3d2bfb3dd61a435b9903fee08c0

Analysis

max time kernel
146s
max time network
161s
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 19:40

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General

Target

2024-05-21_d491d527c7789f691ebc0052e161a940_cryptolocker.exe
Size

46KB
MD5

d491d527c7789f691ebc0052e161a940
SHA1

4827caa359d452392d12230377ff93bbacbf8122
SHA256

db5dac3193c73835fd7bf0d4ad2d921a7eddd3d2bfb3dd61a435b9903fee08c0
SHA512

7745b59ef40695ce17c041501e2ab2755083bfca1e2408bba716afa51f1afdb4c5e4fd455d96276b2402c649fc32e77c7078c25a004b5dde1e93f465fb3f8fc0
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLm:qmbhXDmjr5MOtEvwDpj5cDtKkQZQg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5108-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5108-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5108-5-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325b-18.dat	CryptoLocker_rule2
behavioral2/memory/3056-31-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/5108-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5108-5-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3056-31-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5108-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5108-2-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5108-5-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002325b-18.dat	UPX
behavioral2/memory/3056-31-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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_d491d527c7789f691ebc0052e161a940_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3056	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 5108 wrote to memory of 3056	5108	2024-05-21_d491d527c7789f691ebc0052e161a940_cryptolocker.exe	94
PID 5108 wrote to memory of 3056	5108	2024-05-21_d491d527c7789f691ebc0052e161a940_cryptolocker.exe	94
PID 5108 wrote to memory of 3056	5108	2024-05-21_d491d527c7789f691ebc0052e161a940_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-05-21_d491d527c7789f691ebc0052e161a940_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_d491d527c7789f691ebc0052e161a940_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3056

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=1408 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:3780

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
46KB

MD5
fac8b1d4f4f3c04231d4698918a7cc1c

SHA1
3828be3baea52d19b145d85ef1138dee2e7ac511

SHA256
9e84672a77307b54a42be363e952f4305776010e0a0c0f64cb73b1235345ecc8

SHA512
3fc2b584c1a0ef4be3988ddeaa27fed25671325723d7b36fefbe3da02c3de87c381c1d508b4c8ed29c7e210ebc0f75a65e48e6625183cd6f277ad9ca526b1800

Download Submit
memory/3056-23-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3056-29-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3056-31-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-2-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-3-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/5108-4-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/5108-5-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-6-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download