384456e1683549f7ecddbb492b47607922aee2893ad38b2f842e2c8b7386cfb3

Analysis

max time kernel
153s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 06:30

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General

Target

2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe
Size

67KB
MD5

fe66539ef2ccb78c021d46b6d6a060bd
SHA1

63e38931e77680958130df0029e60fb26c324f5b
SHA256

384456e1683549f7ecddbb492b47607922aee2893ad38b2f842e2c8b7386cfb3
SHA512

5be920127d75159c6a47f57897309fc8e64e48fd6c1c6bef41d96bc1027d5076c7c2806d8cc2f9ba91fd2ab75a9383d54948997da79938c6cd738ea7ffcc5bfc
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAvCbDa6JU:z6a+CdOOtEvwDpjQHW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2548-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023243-13.dat	CryptoLocker_rule2
behavioral2/memory/2548-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3176-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2548-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023243-13.dat	CryptoLocker_set1
behavioral2/memory/2548-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3176-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2548-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023243-13.dat	UPX
behavioral2/memory/2548-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3176-25-0x0000000000500000-0x0000000000510000-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	2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3176	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2548-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023243-13.dat	upx
behavioral2/memory/2548-24-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3176-25-0x0000000000500000-0x0000000000510000-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 2548 wrote to memory of 3176	2548	2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe	99
PID 2548 wrote to memory of 3176	2548	2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe	99
PID 2548 wrote to memory of 3176	2548	2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_fe66539ef2ccb78c021d46b6d6a060bd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2548
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3176

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=3808 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:1388

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
67KB

MD5
917920e6acf952f9896538ee084825c6

SHA1
92538d15adc610ad78ecf0b2c871efca678de243

SHA256
f12fec51b06aedb9505f44ac6ff9f7b4c30bfbbe5996838803aa19755e180267

SHA512
b1a589256d2d3c0cee604fe16fa465a18c325fce8fb4e8550e7c5887dd9ba5bda32557baa9a91768154de92a9134d468d10595caec1299b197bdb9387d10c1db

Download Submit
memory/2548-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2548-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2548-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2548-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2548-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3176-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download