51ae63d04cefe814a141c9b13dd9f09e53283768628bbbb27e766eaf3e5a3085

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16-04-2024 01:44

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General

Target

2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe
Size

129KB
MD5

73277f5a8d2738091cf9f44ef81b0589
SHA1

6c88b7495204ed5e7b9234e9c2dd9f80f36c3d2e
SHA256

51ae63d04cefe814a141c9b13dd9f09e53283768628bbbb27e766eaf3e5a3085
SHA512

5975368cb5aebdcfd15e1b377441f101167cdbd3ec7341dcf6e103a78c0e07939b157fbd6382fb291dfe0fecef1105766d02178db5d50aed54e11ef0fcc92d3f
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eI7K:AnBdOOtEvwDpj6z/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_rule2
behavioral2/memory/1972-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4732-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4732-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_set1
behavioral2/memory/1972-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4732-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4732-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000300000001e970-13.dat	UPX
behavioral2/memory/1972-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4732-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4732-27-0x0000000000500000-0x000000000050F000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4732	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000300000001e970-13.dat	upx
behavioral2/memory/1972-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4732-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4732-27-0x0000000000500000-0x000000000050F000-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 1972 wrote to memory of 4732	1972	2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe	89
PID 1972 wrote to memory of 4732	1972	2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe	89
PID 1972 wrote to memory of 4732	1972	2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_73277f5a8d2738091cf9f44ef81b0589_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4732

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
129KB

MD5
aac28603344f0b32b451a7c2c3811e67

SHA1
da2e79c1d2e48a81c2dcd6f1fe87cfad3a8df132

SHA256
a950f9a870c4e26c8b92aa48c5925813892130b6d206a9ef32255cc67c3d10cd

SHA512
a1ddfde4a44a251a3c36211b22ad5e41276aa86ea0c86d37286205eeee357b795669209c70f5f99dcbebcf3210b8c2b65290035bc68538912fece019aefbcd5a

Download Submit
memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1972-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1972-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1972-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/1972-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4732-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4732-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4732-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4732-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download