b71ad1688f924ff8ea830723005b9f37758941226f9ce66f0611d204be388707

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 07:49

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General

Target

2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe
Size

65KB
MD5

ff6a070d35a3f8347d0f0da50d03d487
SHA1

05dabf67c118cf951dbed86594c72d12146a543e
SHA256

b71ad1688f924ff8ea830723005b9f37758941226f9ce66f0611d204be388707
SHA512

c0b9e3c12af9173cc1a7247f30281d35694c26b1ef441098f3bdfa007dfa7771d669422ea9657cc4fabd68e820bc4b614292aa1b64c5024a9a1c0fa6f81c83ab
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5kJ7AK2c:zj+soPSMOtEvwDpj4kpmeLmQlAlc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023270-13.dat	CryptoLocker_rule2
behavioral2/memory/348-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023270-13.dat	CryptoLocker_set1
behavioral2/memory/348-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/348-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023270-13.dat	UPX
behavioral2/memory/348-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1676-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1676	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/348-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023270-13.dat	upx
behavioral2/memory/348-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1676-26-0x0000000000500000-0x0000000000510000-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 348 wrote to memory of 1676	348	2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe	85
PID 348 wrote to memory of 1676	348	2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe	85
PID 348 wrote to memory of 1676	348	2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_ff6a070d35a3f8347d0f0da50d03d487_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:348
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1676

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\misid.exe

Filesize
65KB

MD5
87f1bfe5e7af4a8d88e6a748bd68ff30

SHA1
3a59632c38ca8dd9673b355c2b975fbd5e4ea3c2

SHA256
d995eb43e88d0cdb8e5eee45837fa6d4808f1e9b69e637c945a4c26374a7aa9f

SHA512
484b13a773f1cec4d7d8d6e21c5b67a5d96bd385156314ed29c70f2f85bf45cfbb0c65257155dee8df671d5de95df2ee378b574331f6964086a076a89ca9d8dd

Download Submit
memory/348-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/348-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/348-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/348-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/348-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1676-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1676-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1676-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download