64ee33fcb10b1bedb79ec380ef93c06b820253dcbfd4a2520ae54d26461602ea

Analysis

max time kernel
145s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 15:24

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General

Target

2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe
Size

56KB
MD5

8d0c7d72f387daf76b817181b41e0b6a
SHA1

de9ce5181e1a24f3ddffce37f3dd9313da4149ba
SHA256

64ee33fcb10b1bedb79ec380ef93c06b820253dcbfd4a2520ae54d26461602ea
SHA512

025b841f20502928b2987a64c8345081ccff6f6ede769a429a82111889eaec10da3ae87d685520f2f43acee92c02da4bf7d77ae822f3c80767ea32c8b865918e
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axR1:z6QFElP6n+gKmddpMOtEvwDpj9aYaX1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023269-13.dat	CryptoLocker_rule2
behavioral2/memory/1620-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1392-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023269-13.dat	CryptoLocker_set1
behavioral2/memory/1620-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1392-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023269-13.dat	UPX
behavioral2/memory/1620-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1392-26-0x0000000000500000-0x0000000000510000-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	2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1392	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023269-13.dat	upx
behavioral2/memory/1620-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1392-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 1620 wrote to memory of 1392	1620	2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe	97
PID 1620 wrote to memory of 1392	1620	2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe	97
PID 1620 wrote to memory of 1392	1620	2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_8d0c7d72f387daf76b817181b41e0b6a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1392

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=4796 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:2404

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
56KB

MD5
e406db506ed8b73eba4c054cd328735f

SHA1
cd8010607d0a51054382fe642710f065ba2673ea

SHA256
92a0082bfdb8c1f9bb2b6a5d6a9250755d58f507bfd5a2d3c5945c562f51fa03

SHA512
43de9761da0b50fad7e0cbda03d044528cb9078d72027a863e392a1de4599620a5dc9c0411260b5aa4e2c8f6ce66816d4dbc9b3fa659bf6531fa0c7949e30c92

Download Submit
memory/1392-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1392-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1392-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1620-1-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/1620-2-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/1620-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1620-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download