3d3106851950018e0d1a33bbfb8f84157019bab06d18d8888e0d61303bd00ec3

Analysis

max time kernel
142s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 23:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe
Size

39KB
MD5

fabbd2708bc61db2fae455d651fe142f
SHA1

b63745195d55ad18bcafbe531bd74fdedd101461
SHA256

3d3106851950018e0d1a33bbfb8f84157019bab06d18d8888e0d61303bd00ec3
SHA512

6f76cf5c8c53dda6ed080eb17306650de78a4acaff793e7cc940b0858a966454baf53c87c2ea1e7f67fec802d258a857af9600795e84e77a715cf338c1d51127
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBY:qDdFJy3QMOtEvwDpjjWMl7TdK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2332-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2332-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2332-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2332-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2152 asih.exe

pid	process
2152	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2332-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2332-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

description	pid	process	target process
PID 2332 wrote to memory of 2152	2332	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe
PID 2332 wrote to memory of 2152	2332	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe
PID 2332 wrote to memory of 2152	2332	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2332

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2152

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=3696 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:400

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

Loading Replay Monitor...

Downloads

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

Filesize
40KB

MD5
0c3bb868150e16b154fba3a33aff40a6

SHA1
3f3c04372f697ab2cd9aef7fe87c41cc01b98380

SHA256
5b6a8a1c5705fcf62689f8fab9965232c306053566d6b36b380e03ab72561c1c

SHA512
d709e21096b404215176c0b00a3d3c458fc0285f1bdbfefb620a91dd1d908920c1f84b8078ab9444c265fe9f44802a4211a5bef10f1d9f67cedbd9700576a7e3

Download Submit
memory/2152-18-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2152-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2152-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2332-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2332-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2332-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2332-3-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/2332-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download