f2baf07fd55f87af25b90b5fcb88aac5774265a456c7e00a7d04a669a02ca123

Analysis

max time kernel
150s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 23:22

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General

Target

2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe
Size

60KB
MD5

070fdb57c8b5ac678b18e4c365c12d5f
SHA1

0b50a158a254742aaa888c9fafd7ffe335c3c156
SHA256

f2baf07fd55f87af25b90b5fcb88aac5774265a456c7e00a7d04a669a02ca123
SHA512

0734135e3b2372829b43d753165aa23a66627f2fa38655da77c70efd2a495b4b4dbf683dc3692a4b73578a719ab7298af7d265d20ed22afe53b70ac8e7a2fa85
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6142:BbdDmjr+OtEvwDpjMB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4888-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231fa-13.dat	CryptoLocker_rule2
behavioral2/memory/4888-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4888-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4888-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000231fa-13.dat	UPX
behavioral2/memory/4888-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2088-26-0x0000000000500000-0x0000000000510000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2088	asih.exe

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 4888 wrote to memory of 2088	4888	2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe	90
PID 4888 wrote to memory of 2088	4888	2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe	90
PID 4888 wrote to memory of 2088	4888	2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_070fdb57c8b5ac678b18e4c365c12d5f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4888
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2088

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
60KB

MD5
69e35ed0ecdce12ea529aef13445422a

SHA1
5a7a304dbf50e29d8dd1af0e02f2db5633cf8efc

SHA256
bea5b7dcf57b6a0a9494300e0c2d552540610403446031a8cfb337e2fb36b850

SHA512
e30c3ff273d390df1788fa2b2c86cba181213298c580a2b35fc08f1e1f0bcc6b176d581a6cfdb2fa38059a3d65354b792dbf2d804cfbbe34d51121b9d48750e5

Download Submit
memory/2088-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2088-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4888-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4888-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4888-2-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4888-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4888-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download