51f4065ce69dcf3b56551b5a2180e1d86b0926b8e299b64666c61f5a5ac1b262

Analysis

max time kernel
148s
max time network
151s
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 02:43

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General

Target

2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe
Size

46KB
MD5

9bd8b93d7d94ba82aff73e832391c2e9
SHA1

e3d5e4367871b57c27379eca52b0dde60182481e
SHA256

51f4065ce69dcf3b56551b5a2180e1d86b0926b8e299b64666c61f5a5ac1b262
SHA512

e2b7ccf5ed45818476cf65447a7ebdd87325a3b414e344bb8e40339612260e5178d48f5b282a9739787226fbb29842e9771e31b7ddf7a22a37aeba4550792024
SSDEEP

768:P6LsoEEeegiZPvEhHS5+Mh/QtOOtEvwDpjBpaD3TUogs/VXpAPow:P6QFElP6k+MRQMOtEvwDpjBQpVXzw

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2792-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3100-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2792-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3100-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2792-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3100-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2792-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3100-27-0x0000000000500000-0x000000000050B000-memory.dmp	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_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3100 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3100	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe

description	pid	process	target process
PID 2792 wrote to memory of 3100	2792	2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe	asih.exe
PID 2792 wrote to memory of 3100	2792	2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe	asih.exe
PID 2792 wrote to memory of 3100	2792	2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_9bd8b93d7d94ba82aff73e832391c2e9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2792

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3100

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
46KB

MD5
1db0bcab1aab15ca25ade2a6dbf4fa55

SHA1
6915c13a0fa7e89fc222404f12f6797c5d28cb21

SHA256
715a2d7e1240a94d20e91263ea42fdae0cfb7750d0ed20bd57fc4d1e79c68789

SHA512
9cd9c0c63e964a3e4011d0b0d5880691c61996af79cda681ecc2dda87fb316cc89cae89b76981ed81313e41a1c3d74fbeff5d27f0792b79a8ff1eb62b0c55136

Download Submit
memory/2792-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2792-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2792-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2792-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2792-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3100-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3100-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3100-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3100-27-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download