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

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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 Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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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