a6c4e10524b7bb1a482ae3925796b310b0b40ee452e2a58faf46e8cdd2171354

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 16:45

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General

Target

2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe
Size

42KB
MD5

a78b50cd1d9750a75015ad8508b76181
SHA1

378b4e5c9fbf24f56101d2cacfc83ed4687cfe5d
SHA256

a6c4e10524b7bb1a482ae3925796b310b0b40ee452e2a58faf46e8cdd2171354
SHA512

424cb5d6750da507b6c429b2d19909d8412a75611a68b352917af3c9b091f65eb96385516f2c966951fd11e9e6f52effd336fae3d84500320495878fa4153c0f
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAj:bCDOw9aMDooc+vAj

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1920-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral2/memory/1920-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1316-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

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:

2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

1316 lossy.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1316	lossy.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe

description	pid	process	target process
PID 1920 wrote to memory of 1316	1920	2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe	lossy.exe
PID 1920 wrote to memory of 1316	1920	2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe	lossy.exe
PID 1920 wrote to memory of 1316	1920	2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_a78b50cd1d9750a75015ad8508b76181_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1920

C:\Users\Admin\AppData\Local\Temp\lossy.exe
"C:\Users\Admin\AppData\Local\Temp\lossy.exe"
2⤵
- Executes dropped EXE
PID:1316

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

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Downloads

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

Filesize
42KB

MD5
56dc024954941d09ed2537f9cdd841e3

SHA1
36219c855abe1c183d992f95b1d242ab9bf61765

SHA256
930ba8eccaaa4119728e61b95d2829a0e874c8a02a519892a5e705f38d5bc665

SHA512
e8ce6548b94910c274e38af41a89d2ecdcd9d29308544ea428611474430595244eec8967a8e242eb99d58dd156eecf1d4e137bec0e0bcc4e88c2ef58c5d21245

Download Submit
memory/1316-19-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1316-25-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/1316-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1920-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1920-1-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/1920-2-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/1920-9-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/1920-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download