ab895d084fa3f5ea0599300186fdc9d25fb6c7dacf4b5155b12306ac36bb50b7

Analysis

max time kernel
143s
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
26/04/2024, 12:31

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General

Target

2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe
Size

60KB
MD5

669002d8c62f956dbc1ee407195a3daf
SHA1

2f098d051dbae1158362dc75cea33d70a4b3a8d1
SHA256

ab895d084fa3f5ea0599300186fdc9d25fb6c7dacf4b5155b12306ac36bb50b7
SHA512

674d76b1e852503634b742dfb6d6dd297dfdbf3adc794ef9e2c3e47a3dfa75659c676d882e649670c6c618308b0cd5fb0c06ad6fd95a75093f3a06bf67b07dec
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHNMhY:1nK6a+qdOOtEvwDpjo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1424-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023232-13.dat	CryptoLocker_rule2
behavioral2/memory/1424-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1892-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1424-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e000000023232-13.dat	CryptoLocker_set1
behavioral2/memory/1424-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1892-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1424-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000e000000023232-13.dat	UPX
behavioral2/memory/1424-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1892-26-0x0000000000500000-0x000000000050F311-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	2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1892	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1424-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000e000000023232-13.dat	upx
behavioral2/memory/1424-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1892-26-0x0000000000500000-0x000000000050F311-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 1424 wrote to memory of 1892	1424	2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe	90
PID 1424 wrote to memory of 1892	1424	2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe	90
PID 1424 wrote to memory of 1892	1424	2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_669002d8c62f956dbc1ee407195a3daf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1892

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=1328 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:3452

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
61KB

MD5
ed71f0beeb0ea3bd55f18bf779b0c36d

SHA1
e120e50c6038dfb501eeb36a660d0009dcb2e3cd

SHA256
a01801d6cc02a89bca2d66ef142a52b5ae5ba3e6d543553a3e7b66497c4ac6f9

SHA512
266304fa0b9e1fb1f625ad582d71dd6ae9e9cf74a3b67e16f528085009baa871823ea55a881c6758eda37e0bca6e5522e8ed11267945e7fe46dd34d5ccb73666

Download Submit
memory/1424-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1424-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1424-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1424-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1424-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1892-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1892-24-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1892-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download