704e01034b73bf57da7f8a4958fbbea3f24f7915daf8ed270e84c77f5eb7f28a

Analysis

max time kernel
156s
max time network
187s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 23:30

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General

Target

2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe
Size

63KB
MD5

e8c140de37a0d2298ce11c6a95fe322d
SHA1

c7e97944167b601e20f97b7e9301cacea14e6fa5
SHA256

704e01034b73bf57da7f8a4958fbbea3f24f7915daf8ed270e84c77f5eb7f28a
SHA512

af22ce080b9e95aa4d541746e9a240b7a926ceede05afa04ff63638d72e25f6b64ac35eafe30f7484481272e54cfc1bc12dac00f467bd8320ee90d3480d9dcb7
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6U2:1nK6a+qdOOtEvwDpj/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4396-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_rule2
behavioral2/memory/4396-14-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3852-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4396-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_set1
behavioral2/memory/4396-14-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3852-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4396-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000022480-13.dat	UPX
behavioral2/memory/4396-14-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3852-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3852	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4396-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000022480-13.dat	upx
behavioral2/memory/4396-14-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3852-26-0x0000000000500000-0x000000000050F311-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 4396 wrote to memory of 3852	4396	2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe	90
PID 4396 wrote to memory of 3852	4396	2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe	90
PID 4396 wrote to memory of 3852	4396	2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_e8c140de37a0d2298ce11c6a95fe322d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3852

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
63KB

MD5
6f6d2870a1f64a2823d16bf7e24b0849

SHA1
17e2133d448779ab006757b54f31d8bc09f9ba21

SHA256
73b78052493cb840e5699b39e3fd0dd31fb2412629c450122a50bb38602bdb67

SHA512
b11d437644d2350fee4f04841e1064048b2c98245dcea2610e283e66360d5f4d52845f1ae6598f27977b6d0fdd864e92b430bea1b56c8963be9009421318f712

Download Submit
memory/3852-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3852-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3852-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4396-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4396-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4396-2-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4396-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4396-14-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download