b0b6de6ae5525bb4f817573e9733a15e438021c0812334c80607ae9332c71d54

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 19:26

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe
Size

126KB
MD5

bb53ee4d545beb6e607e6e0de66238d3
SHA1

1e30a74eb97ea8ea4295a66eb7feea0d882cc671
SHA256

b0b6de6ae5525bb4f817573e9733a15e438021c0812334c80607ae9332c71d54
SHA512

d236119efe258c76087128fa8efc945170fea9f5a034935e865778e20f51708f8575652ab1d9ef4bbd3f835d32d2764ac7317a7ea538bc491ba08ef9f28cf149
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eInp:AnBdOOtEvwDpj6zc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3496-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3496-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3496-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3496-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3496-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3496-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-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:

2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

5060 asih.exe

pid	process
5060	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3496-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3496-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-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:

2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe

description	pid	process	target process
PID 3496 wrote to memory of 5060	3496	2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe	asih.exe
PID 3496 wrote to memory of 5060	3496	2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe	asih.exe
PID 3496 wrote to memory of 5060	3496	2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_bb53ee4d545beb6e607e6e0de66238d3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3496

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:5060

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
126KB

MD5
a856cf8efaf9b92e8d5577298bc0bc27

SHA1
48a6011d30e6abf2e8318b38052d4e06c649ac78

SHA256
0670061d4fcc8a4619fdb78b0afa6c3f490f68a485f3468c0bcb80ee8724cc70

SHA512
01f92bc10538677ff7353b4c5a05cd298c61d11b765ab98d045429f57ed61ed7857c93288ea14a6469ead4731f4fec79de3bdd2d2474d93476dc754cc3796570

Download Submit
memory/3496-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3496-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/3496-2-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/3496-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/3496-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5060-20-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/5060-19-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/5060-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download