54be9e960ef204bd25edede94e7cba52433d3eaa7bd686d090269a8f441c322a

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-04-2024 13:30

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General

Target

2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe
Size

82KB
MD5

3e5ce860ead9c2f3ae25f053ca240f74
SHA1

7c238a6a51643f38ae0ea6b5de00dabb3a323892
SHA256

54be9e960ef204bd25edede94e7cba52433d3eaa7bd686d090269a8f441c322a
SHA512

62c27deff61026cacae7b931224cf8354458c412108841e6de95d5ec6af715612a0cc104b61a5eb66490f8f086f8bd5bfbe039165db7c11d203885ad650d1b3f
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBd0geL:T6a+rdOOtEvwDpjNtC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e00000002314e-13.dat	CryptoLocker_rule2
behavioral2/memory/4688-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1744-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e00000002314e-13.dat	CryptoLocker_set1
behavioral2/memory/4688-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1744-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000e00000002314e-13.dat	UPX
behavioral2/memory/4688-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1744-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1744	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000e00000002314e-13.dat	upx
behavioral2/memory/4688-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1744-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 4688 wrote to memory of 1744	4688	2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe	88
PID 4688 wrote to memory of 1744	4688	2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe	88
PID 4688 wrote to memory of 1744	4688	2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_3e5ce860ead9c2f3ae25f053ca240f74_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4688
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1744

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
83KB

MD5
cd97bd1423a770b2162826fab8baf3b2

SHA1
3490886fab151f39f54de7d33175a96c5a77b4c3

SHA256
5e52d9739805b2c91495251686176f857dc4f9bfd7568133ab6fdf684ef156a2

SHA512
b5665f3336f744b0fb751494bc397c35dfb9f04cb50e67aaab39cd1c57dbc84314f915dd7eb7b2f49ddf10820871b8976fe405e3508168098bd696b97e5fc500

Download Submit
memory/1744-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1744-25-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1744-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4688-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4688-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4688-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4688-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4688-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download