b2aeab69ae04328a88486b5b0478678a92a15bc3c230cf8a8e2e7ec179e8f560

Analysis

max time kernel
153s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 23:24

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General

Target

2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe
Size

38KB
MD5

5552d9c93ff3f4017866733bebaca569
SHA1

007c5cdf7c10f7992bafc008c77848ff1d954919
SHA256

b2aeab69ae04328a88486b5b0478678a92a15bc3c230cf8a8e2e7ec179e8f560
SHA512

350e73866e5622cc083de44e06d4b836b13109893f709b56c72a45705c9adeea593cba83d6eba2e5b3d90f06a8e7ae6fe70c8ba2ee6ca1f3e1cf89782e26b508
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYak:qDdFJy3QMOtEvwDpjjWMl7Tdk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002351c-13.dat	CryptoLocker_rule2
behavioral2/memory/2868-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1552-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002351c-13.dat	CryptoLocker_set1
behavioral2/memory/2868-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1552-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002351c-13.dat	UPX
behavioral2/memory/2868-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1552-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1552	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000900000002351c-13.dat	upx
behavioral2/memory/2868-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1552-26-0x0000000000500000-0x0000000000510000-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 2868 wrote to memory of 1552	2868	2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe	94
PID 2868 wrote to memory of 1552	2868	2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe	94
PID 2868 wrote to memory of 1552	2868	2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_5552d9c93ff3f4017866733bebaca569_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1552

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
38KB

MD5
37e8da784e39962721fb6fcb652157f8

SHA1
a4cdb7cf7c5abcab89abe0aa15f4064765c97e3d

SHA256
a3099c3c00fab1673b578cea104feee2caa8eb35feafe872eb9b06f3e340a7cd

SHA512
d89390a22a8d96876805f53c757a99e500da0748d8f6f2a38a2ed77ad9ca9a9e7e47f47695a0f6816eaabe9c993fd726dcd395877ffc07cd6670a549709bd3f2

Download Submit
memory/1552-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1552-20-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1552-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2868-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2868-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2868-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2868-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download