75f1f72948625dbf884e520ab17d137f3f0106b8cfe84cff6901a44ca19c6591

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 18:10

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General

Target

2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe
Size

31KB
MD5

e5dbb08e6d04232d1c8e826a05a52374
SHA1

df95d741eb9c6e5ce34f7ca2e406ed9f048421fe
SHA256

75f1f72948625dbf884e520ab17d137f3f0106b8cfe84cff6901a44ca19c6591
SHA512

fa185ad308ed09cfbf2157756c4f84c4e3230a0d66f3e566b5b72f571c13e59804945743656798fe9432decb3eefe2650b8d6012c6bc2fbffc61afcf0d4c3efb
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tH3MW:q0zizzOSxMOtEvwDpj/arqp

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231e8-13.dat	CryptoLocker_rule2
behavioral2/memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4508-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4508-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231e8-13.dat	UPX
behavioral2/memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4508-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4508	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 1368 wrote to memory of 4508	1368	2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe	84
PID 1368 wrote to memory of 4508	1368	2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe	84
PID 1368 wrote to memory of 4508	1368	2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_e5dbb08e6d04232d1c8e826a05a52374_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4508

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
31KB

MD5
ba813f9b3b7989a47876cd781a8dd09b

SHA1
9f1970aa2f1aac5b758ab3d5125a8c0af16a2cd8

SHA256
e5ffe0aea8a930724a003d8fa2ac2b061fd09f93a3d7b96022ecf37ed6069bfa

SHA512
b97e9196242966770efa9cc01cfddb319bcfd542f9997479e7c270786d2162cddb85c42ba2d531d6839640057e6bfd32bbd7a0defa681f2da559e3591fc8cb30

Download Submit
memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1368-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1368-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1368-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4508-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4508-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4508-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download