2fcb16d44e372e5237d1f1f3f694a1933a1c35051702f665b9bcf087f1c17107

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
22/04/2024, 09:14

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General

Target

2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe
Size

79KB
MD5

f73d1e5040b268b099812317b7ab99a3
SHA1

7a4fe71feb606352bf309d73b43a7517b6f1f596
SHA256

2fcb16d44e372e5237d1f1f3f694a1933a1c35051702f665b9bcf087f1c17107
SHA512

16f9304d36d8258ea7b0e1f1cdcbe01574c8af927bc9c9b1e84e288ee83c18bcf18b44144f7031c6509b0c81c93148130a7cdba493a0ac0161e194c98c71217c
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuqH:T6a+rdOOtEvwDpjNcc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_set1
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4108-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4108	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4108-26-0x0000000000500000-0x0000000000510000-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 5108 wrote to memory of 4108	5108	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	86
PID 5108 wrote to memory of 4108	5108	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	86
PID 5108 wrote to memory of 4108	5108	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4108

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
79KB

MD5
56688b85e74322993a6f845aeb0852fe

SHA1
b5756884d15a149d0fe64c094a8e0fe617a36217

SHA256
428d88d20a68fb54e0df57a5a0410103f8b60dd545fa44b6e0d9f70959c8ee0e

SHA512
b4be7dac401e7bea52f3b6a58bc306363e522ea82e5762122812d4d6d3071c5be856075afeaa96b115c34a9d771dabcafa3e1c99cdd701c77adc74b0b301a624

Download Submit
memory/4108-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4108-22-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4108-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/5108-2-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/5108-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download