6c7a0b370c4356488b97dc5e242b4153b9820d5bf20dd11d9dbb0f7f38da201b

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 21:23

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General

Target

2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe
Size

74KB
MD5

8ccc302902f66f163af206baae709628
SHA1

4ca4de9c0d893f4734fc4d7959ee12713a0c3fb1
SHA256

6c7a0b370c4356488b97dc5e242b4153b9820d5bf20dd11d9dbb0f7f38da201b
SHA512

bf6a417b04bd8ea75e95cb95f14df22feb329354f2d66a2c8a7637699fa1f0317fef59ddab9717c13f73afa4d45612fff61d6a412a8b821c6ec63ac58187cf18
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalVr5:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5028-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023457-13.dat	CryptoLocker_rule2
behavioral2/memory/5028-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4292-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/5028-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023457-13.dat	CryptoLocker_set1
behavioral2/memory/5028-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4292-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5028-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000023457-13.dat	UPX
behavioral2/memory/5028-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4292-27-0x0000000000500000-0x000000000050F311-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4292	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5028-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000023457-13.dat	upx
behavioral2/memory/5028-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4292-27-0x0000000000500000-0x000000000050F311-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 5028 wrote to memory of 4292	5028	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	85
PID 5028 wrote to memory of 4292	5028	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	85
PID 5028 wrote to memory of 4292	5028	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4292

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
74KB

MD5
164ab32656c998dfdccd08bb8cdc98ba

SHA1
d50a496b5d213ba57e78fbd29834f5d79494f6fe

SHA256
51b546728c67f8a4cc910dc9711b813d6f82d6d25052b862d18807ac4284a4d8

SHA512
4c6716272455e445bde55183f215638d6961b2a8905b7dfd0d5f84b5dcb9d5832181423063997e72e0e7294dd6839d712a8602ecbf4235ce5f150c101333db78

Download Submit
memory/4292-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4292-20-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/4292-21-0x00000000007F0000-0x00000000007F6000-memory.dmp

Filesize
24KB

Download
memory/4292-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5028-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5028-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5028-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/5028-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5028-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download