0de41ff826682c4dae42a1d2d9b702ddf207cb674ada33d1773f93eafa83ad4f

Analysis

max time kernel
147s
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 02:32

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General

Target

2024-05-22_4d75aad41f1e7200685846194ba21475_cryptolocker.exe
Size

77KB
MD5

4d75aad41f1e7200685846194ba21475
SHA1

b83fd9103e46bfd64be3af77169ef0eda77f145a
SHA256

0de41ff826682c4dae42a1d2d9b702ddf207cb674ada33d1773f93eafa83ad4f
SHA512

9c549d7edba2b09de53e9265d034b58513b90002b11cf3bb0d8bb173f4ed2fe0e5ce53379093b921db48570e4f622f972f502adbd5a299b5b2b635338575d6ce
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1u:T6a+rdOOtEvwDpjNtHPp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1476-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2968-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1476-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2968-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1476-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2968-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-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_4d75aad41f1e7200685846194ba21475_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_4d75aad41f1e7200685846194ba21475_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1476 asih.exe

pid	process
1476	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1476-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2968-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-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_4d75aad41f1e7200685846194ba21475_cryptolocker.exe

description	pid	process	target process
PID 2968 wrote to memory of 1476	2968	2024-05-22_4d75aad41f1e7200685846194ba21475_cryptolocker.exe	asih.exe
PID 2968 wrote to memory of 1476	2968	2024-05-22_4d75aad41f1e7200685846194ba21475_cryptolocker.exe	asih.exe
PID 2968 wrote to memory of 1476	2968	2024-05-22_4d75aad41f1e7200685846194ba21475_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4d75aad41f1e7200685846194ba21475_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4d75aad41f1e7200685846194ba21475_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2968

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1476

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
77KB

MD5
3522f7904cdf72790db69bd87d061d17

SHA1
47676e4a3a1601dd96dece8336d9378f6c3455b1

SHA256
f89ab74e5982c135a3118fbc53df3656120c9efd9108ba69aa54fbb627c2c3db

SHA512
8e5adc51b43c3d9e02bc0b9a6565f75ec5f2e0b931f1201f62381ef2990dfb07d0c38c5986bfa509d0d9941aa23c6132fc7b14d29afe4635e8ecc2b62582ddf6

Download Submit
memory/1476-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1476-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/1476-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1476-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2968-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2968-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2968-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2968-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2968-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download