31bc5ea1822460f6a768c4bc9e803bb8c8bb2899c6c0895d9ac4825fd9923091

Analysis

max time kernel
154s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14-03-2024 10:30

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General

Target

2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe
Size

91KB
MD5

2fd33a8e4bf12160accb227b315702d4
SHA1

886e1307123f93a3932477e82ade45c29eafd579
SHA256

31bc5ea1822460f6a768c4bc9e803bb8c8bb2899c6c0895d9ac4825fd9923091
SHA512

28a7394764361f22b6a5c03195482a67ae63a5a22d7f6abee074f5aca8c614a3c6c95c9c975975f13531e59d112b9db3ad0bc36fc401ddb91a7cb3fb98f939a0
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy87Uv5:zCsanOtEvwDpjA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023213-13.dat	CryptoLocker_rule2
behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2404-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023213-13.dat	CryptoLocker_set1
behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2404-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4348-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023213-13.dat	UPX
behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2404-25-0x0000000000500000-0x0000000000510000-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	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2404	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4348-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023213-13.dat	upx
behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2404-25-0x0000000000500000-0x0000000000510000-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 4348 wrote to memory of 2404	4348	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	88
PID 4348 wrote to memory of 2404	4348	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	88
PID 4348 wrote to memory of 2404	4348	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4348
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2404

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
91KB

MD5
3d595ed3bea8d607dd07a8e4f3531c51

SHA1
0dbb71d3553d5e677868fe491bcca31450bd8720

SHA256
cfabc8ae21aab0646c853ae7ca2351919cd0b0e6c484fb9d7ab144c28ea70047

SHA512
37ed6c2807408f48924ecb9392271d5e93b68e0a106315d063c254e4c695d10a288b9d8080c5db2be06fafc27474eb158eab1ff8d4d363c3f1b6309c51189784

Download Submit
memory/2404-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4348-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4348-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4348-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4348-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download