2547f9e678acc517dbee4b6cc7428bd1da282e6a2223079938dc914e1d3c2ca5

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 15:28

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General

Target

2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe
Size

101KB
MD5

238935d558251a9b0f8f06d99763dc9a
SHA1

b55127b15a8836e26a83536ea4201c078e212b33
SHA256

2547f9e678acc517dbee4b6cc7428bd1da282e6a2223079938dc914e1d3c2ca5
SHA512

985dabef1837115681fa9b896af0df486db297510a189b12a517851be05ef3a2ccba6e363c811dfdca99a09d81b641da97c5babb014591e98f3f2605958ed505
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy6ixg:AnBdOOtEvwDpj6zz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3620-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/3620-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1680-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3620-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_set1
behavioral2/memory/3620-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1680-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3620-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/3620-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1680-26-0x0000000000500000-0x000000000050F000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1680	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3620-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/3620-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1680-26-0x0000000000500000-0x000000000050F000-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 3620 wrote to memory of 1680	3620	2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe	90
PID 3620 wrote to memory of 1680	3620	2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe	90
PID 3620 wrote to memory of 1680	3620	2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_238935d558251a9b0f8f06d99763dc9a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3620
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1680

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
102KB

MD5
482a6bfbf421f94b6b6957f46649c1de

SHA1
389120d86b77dde96ff145a69488f3cc31a29e5c

SHA256
bc62fe8dffb59d77f05e52056dcdb7aa0f22b22c279d7e1cccc3e43c22c783f5

SHA512
81e6a4432066b2e91f867ce921aa4f486163de52393835af3f04e2a7c5de64da08daf087ab02d2c1686c52e08c44b4f5b00ead87f8028e85977f00e823e65c59

Download Submit
memory/1680-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1680-19-0x0000000000880000-0x0000000000886000-memory.dmp

Filesize
24KB

Download
memory/1680-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3620-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3620-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3620-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3620-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3620-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download