bc85efa700216432db5ebbc8c70106e9cbf898120c0f74f0f6ca4a5625a70336

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:47

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General

Target

2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe
Size

41KB
MD5

be8bea3c4d348c61efd594c39b2fbd56
SHA1

0a6011a2cb06de44030e61e605eb3699b283f924
SHA256

bc85efa700216432db5ebbc8c70106e9cbf898120c0f74f0f6ca4a5625a70336
SHA512

a1def7c13dff5a10420c8c7d97957b40d779df9a45502a08cf6218f277d47a24ebb3ab0f059640dc54b741cc0c6e0aa58e7548d9ce24c365d2f931a14272b38d
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaac4HK/wSvuQTCjJ:X6QFElP6n+gJQMOtEvwDpjBsYK/f4J

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1

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_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

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

System Information Discovery
T1082

pid	process
968	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe

description	pid	process	target process
PID 3152 wrote to memory of 968	3152	2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe	asih.exe
PID 3152 wrote to memory of 968	3152	2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe	asih.exe
PID 3152 wrote to memory of 968	3152	2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_be8bea3c4d348c61efd594c39b2fbd56_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3152

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:968

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
41KB

MD5
57b51931adcd84704b58c81852428aec

SHA1
e8a6338de0c002845f37a35e2abb3e2e9e073003

SHA256
fa2f771617ed5a384f35d34a680055a2bc3c0910178358306668ebcb695da267

SHA512
943b3c7af188981f39c9765c5c181dc33163f97f25a8176f18d0e2c78cb0121aea87101dec14a152e7ad5af4deb83300013b31e90080e3411312e7d0b6569f5e

Download Submit
memory/968-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/968-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3152-0-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3152-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3152-8-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download