2b3c5ced5d4190ddff063da139deacbf253780ffbbe6a230757c7f109cedd8c9

Analysis

max time kernel
152s
max time network
168s
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 14:44

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General

Target

2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe
Size

57KB
MD5

8e251b001374514a01acc5cad7e55676
SHA1

230b7b0375d0bfc67b24ef9cac2e2b5a7675efc5
SHA256

2b3c5ced5d4190ddff063da139deacbf253780ffbbe6a230757c7f109cedd8c9
SHA512

a889443662e4218f54db22da1f9d43f5a09840574c07394c99e0d181e7afccb8b2da09ff4fda7c9623c98581c5de0b7ac324835350d79a68e5498c7c049eb91b
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaM6Kwq:z6a+CdOOtEvwDpjQ+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_rule2
behavioral2/memory/1032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/540-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_set1
behavioral2/memory/1032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/540-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1032-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023215-13.dat	UPX
behavioral2/memory/1032-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/540-26-0x0000000000500000-0x0000000000510000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
540	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1032-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023215-13.dat	upx
behavioral2/memory/1032-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/540-26-0x0000000000500000-0x0000000000510000-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 1032 wrote to memory of 540	1032	2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe	87
PID 1032 wrote to memory of 540	1032	2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe	87
PID 1032 wrote to memory of 540	1032	2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_8e251b001374514a01acc5cad7e55676_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:540

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
57KB

MD5
970a132e31587e866ecbbdbea44085c4

SHA1
7348e6fdc5bc3eb0b4bc1c8153363d6fa7f1f813

SHA256
ad91eeef55bc7ebff5dc61f3d73f368137a4c38d095dafe4b87835cc349a0a3e

SHA512
06df6bf67a3a1b6ca20dfc7913f4ef76aab47718ad755eabc8475de77ea6ecb9a4b281bd4a027a4672581b43b9576418c9f91df9798efb8dc3f2405144eda3b0

Download Submit
memory/540-19-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/540-22-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/540-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1032-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1032-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1032-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1032-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1032-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download