c714afdd08a37d301706580316bb17161c4613b04b75437cdd6c6711cb340aab

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:00

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General

Target

2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe
Size

40KB
MD5

f7d3668b5ded119e2c2c9ae017ff710b
SHA1

3b5e2a501ba17e943aa144949784891749abf9c9
SHA256

c714afdd08a37d301706580316bb17161c4613b04b75437cdd6c6711cb340aab
SHA512

e5f380e7ac3c12ae7d24e4578f1b47dec47156d28546595cfa37258c301f5b4b37593b3e40dfa8cfc4c470b68f30c11f4a15509b5615e048bb2c6863843c87e5
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYw:qDdFJy3QMOtEvwDpjjWMl7TV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1348-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4088-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4088-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1348-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4088-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4088-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1348-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1348-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4088-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4088-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4088 asih.exe

pid	process
4088	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1348-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1348-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4088-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4088-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe

description	pid	process	target process
PID 1348 wrote to memory of 4088	1348	2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe	asih.exe
PID 1348 wrote to memory of 4088	1348	2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe	asih.exe
PID 1348 wrote to memory of 4088	1348	2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_f7d3668b5ded119e2c2c9ae017ff710b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1348

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4088

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
98f819a5907bdb3b7167976ec09aaed1

SHA1
7f81cb353bb4529bae32d9b8bbd9c5a44093201a

SHA256
8ccd3dae93849edfe9eae10d90fa5df0771330cf4be674553059bc2a2cc35c7e

SHA512
da23b7f1bc237fb6789a3850ad00e96cbca4bc9eb1c9621c3274a1868729c0369b3094c9f1c1bab68b6b258728a741ba6785f775c9ab5d25d4c348f1b6621661

Download Submit
memory/1348-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1348-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1348-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1348-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1348-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4088-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4088-20-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/4088-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4088-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download