63dd44893caf0b2e9af3537ab130709ef48ffcfe32515b95991c31f2124f385f

Analysis

max time kernel
153s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24-02-2024 22:22

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General

Target

2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe
Size

117KB
MD5

17b39258258bcf17e08b01ec09ebdfba
SHA1

3f1d3734520803e9b02de0b3f76a9442b64ee60b
SHA256

63dd44893caf0b2e9af3537ab130709ef48ffcfe32515b95991c31f2124f385f
SHA512

f3f826afedbdaa4d96a84a013869a559eb255a51cbefd9b3ea2603bbcbda2eaca7e3a747776a6185dcd6837113518eacca6642064acd86351b2ffb4bed3c2755
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01H:z6a+CdOOtEvwDpjczF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231e0-13.dat	CryptoLocker_rule2
behavioral2/memory/4836-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3448-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231e0-13.dat	CryptoLocker_set1
behavioral2/memory/4836-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3448-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231e0-13.dat	UPX
behavioral2/memory/4836-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3448-25-0x0000000000500000-0x0000000000510000-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-1-5-21-2828415587-3732861812-1919322417-1000\Control Panel\International\Geo\Nation	2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3448	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000231e0-13.dat	upx
behavioral2/memory/4836-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3448-25-0x0000000000500000-0x0000000000510000-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 4836 wrote to memory of 3448	4836	2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe	88
PID 4836 wrote to memory of 3448	4836	2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe	88
PID 4836 wrote to memory of 3448	4836	2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_17b39258258bcf17e08b01ec09ebdfba_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3448

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
117KB

MD5
b381efffc82f60ed245a8f6d548c24f1

SHA1
587f463e585964a6ca72087fe0145ea15aa55667

SHA256
fa552a26daa5ad7249165e6d104bb2b46ceba86322f28f8c2826d2db71fd91d1

SHA512
425550ca583bcd2577494f67359d0d6438b8515be6395a551baf1da75fbe7e86c911b119b60ae7222b2e011dd2fe299fe2ea53c795e6d2c862b73b702cf2b4e9

Download Submit
memory/3448-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3448-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4836-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4836-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4836-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4836-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/4836-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download