1489809b51bac4de67fd18769d7f10becbd91f07b4079100301a469a09f4e4a4

Analysis

max time kernel
157s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 13:08

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General

Target

2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe
Size

105KB
MD5

fc1a0ef595a24829d1553e6f1996245d
SHA1

36529d7c1a5c8916ecdbad7be67882a885cf25fd
SHA256

1489809b51bac4de67fd18769d7f10becbd91f07b4079100301a469a09f4e4a4
SHA512

c6e1416a1fb61e920fe76f0b15cad2853c00752076fdb5ba166997cc21cfb80d4049c4c08c3c67f4ace85d7f35083e449a7886be3b3f12ce665d6c33b12820dd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgT:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002331b-13.dat	CryptoLocker_rule2
behavioral2/memory/3756-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3372-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002331b-13.dat	CryptoLocker_set1
behavioral2/memory/3756-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3372-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000002331b-13.dat	UPX
behavioral2/memory/3756-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3372-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3372	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000002331b-13.dat	upx
behavioral2/memory/3756-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3372-26-0x0000000000500000-0x000000000050F311-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 3756 wrote to memory of 3372	3756	2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe	96
PID 3756 wrote to memory of 3372	3756	2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe	96
PID 3756 wrote to memory of 3372	3756	2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_fc1a0ef595a24829d1553e6f1996245d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3756
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3372

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=1416 --field-trial-handle=2240,i,16875000905773190493,11379096115878622792,262144 --variations-seed-version /prefetch:8
1⤵
PID:572

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
105KB

MD5
4b4e48f11d346dd2705d92aee4cc3b4b

SHA1
01c708797e4fa549283d22e44f718dfd1a17895a

SHA256
3dcaa5b52d53413e683bd420b55a9c4f22ca3c7b669113711eca588cdf9cbe62

SHA512
025351440e459d55791fcff367b8c726be7ce1108cad988ee3e75de525b811e9324fdfb1d4f19430c60c632357abedf809059927166f3b8a65f733b337b88376

Download Submit
memory/3372-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3372-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3372-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3756-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3756-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/3756-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/3756-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/3756-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download