50e15c31a69415d3723c60780e20608c4093a28bcb03e3f83649d7ea0e3b954c

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 06:32

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe
Size

32KB
MD5

23bfd1cf518cbb937de8f6fd3521a66a
SHA1

f969f6aae4fb7bbf44961976aa675ec704e99331
SHA256

50e15c31a69415d3723c60780e20608c4093a28bcb03e3f83649d7ea0e3b954c
SHA512

0fa4b77df2189710260c02efff58dcaae3893e4df1d04f2cbd43f60dcdc6d9527098b2adbacac42f857e392b671d0d38dad57484d4fdd75a83207f5926c3ee44
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHbjyz:q0zizzOSxMOtEvwDpj/arqc

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4840-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_rule2
behavioral2/memory/4840-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4840-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4840-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023215-13.dat	UPX
behavioral2/memory/4840-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4608	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 4840 wrote to memory of 4608	4840	2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe	88
PID 4840 wrote to memory of 4608	4840	2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe	88
PID 4840 wrote to memory of 4608	4840	2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4840
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4608

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
33KB

MD5
59bb36e46e9bf0f78c88a9c1e75508d2

SHA1
a70ee3a57ce4dfb8abc82f28f58b95df4a17d8bd

SHA256
c32ef29bf45ebd8b14aac0b1ca3f2289696abcea7d5df305a60e444124b97b1b

SHA512
b7f5b81416e900587cf51389ba3290ffc578d972a324dea3beecf7cc13f9e7e8f9c200a9e388440dd513afa462217f27328cd2171d4678efce7840f6f69ef764

Download Submit
memory/4608-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4608-19-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4840-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4840-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4840-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4840-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4840-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download