85cfcca9de75e85675556de4b7600a53d9c29c5cf168fddbe36348c9e6d9dcd1

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:34

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General

Target

2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe
Size

39KB
MD5

d93a5e7a420959c4a265daeef0b93c0b
SHA1

1593bfc303e8e4fd9337abe36f27d377a3273adf
SHA256

85cfcca9de75e85675556de4b7600a53d9c29c5cf168fddbe36348c9e6d9dcd1
SHA512

4cd4027438f0c376a49e1a424e6bbc8995b2a23d8bb65f39645f54f57b2abd858635bcd75a408dd7113bea68d1b635bcbc4f51779de97befae0891a35f38c4a5
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBcl:qDdFJy3QMOtEvwDpjjWMl7TdG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4892-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4892-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/768-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/768-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4892-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4892-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/768-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/768-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4892-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4892-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/768-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/768-27-0x0000000000500000-0x0000000000510000-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_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

768 asih.exe

pid	process
768	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4892-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4892-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/768-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/768-27-0x0000000000500000-0x0000000000510000-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_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe

description	pid	process	target process
PID 4892 wrote to memory of 768	4892	2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe	asih.exe
PID 4892 wrote to memory of 768	4892	2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe	asih.exe
PID 4892 wrote to memory of 768	4892	2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_d93a5e7a420959c4a265daeef0b93c0b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4892

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:768

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\asih.exe

Filesize
40KB

MD5
171e3b48240f1f5979d44d7b26e3ff24

SHA1
17d6b0b8eea7bb56f041e70f5eaeaa740fc25dbb

SHA256
aaf9d7bfe64263b372098ae0d2ff1447f6e5e3403fe1a6dc157256575d8af185

SHA512
e37666a552f06ba884543f1e1e901209a0a99c4aa0fa696b9590a5879a71cb8e8dc291a337bf4048ca6c499d29df89e8b3e02ebd3b11d917d73bcdba4cefb306

Download Submit
memory/768-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/768-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/768-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/768-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4892-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4892-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4892-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4892-9-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4892-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download