86949b3cebbb661f11a3b354b7df6aa8558995b4640e850464f61b9db45594a3

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 14:57

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General

Target

2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe
Size

68KB
MD5

d39f7673a1b0ef45b90648c9dd5e12fe
SHA1

0019664fa9a89706378b64f9b2d9486edee739e1
SHA256

86949b3cebbb661f11a3b354b7df6aa8558995b4640e850464f61b9db45594a3
SHA512

dfb8865d6bbe38e0b894545c35090543fc91d0b622d1e8a4d18935fb68bf52473b1a1beb3bec16022ec5055dcd8946937b549c92fe42d582b704ed5381c42e20
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUsn:DW60sllyWOtEvwDpjwF85W

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/5060-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000231f5-13.dat	CryptoLocker_rule2
behavioral2/memory/5060-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/5060-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00060000000231f5-13.dat	CryptoLocker_set1
behavioral2/memory/5060-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation	2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3068	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 5060 wrote to memory of 3068	5060	2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe	85
PID 5060 wrote to memory of 3068	5060	2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe	85
PID 5060 wrote to memory of 3068	5060	2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_d39f7673a1b0ef45b90648c9dd5e12fe_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3068

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
69KB

MD5
58c333ffbc44067581e318b3114bc623

SHA1
3545470f25d1e15315c636ca7d5515b803ab3337

SHA256
721ff8133d61a75e513fc4b803495efdb9242d414bbd137ca2e730a15154211c

SHA512
effd8fc3676272857dc54afdbb68e9f65b844af4a58408248cc04652f27e5c2380ebd4ed51061cd06a0918826e8ecb110508d49e333ffab787a29c54095e9183

Download Submit
memory/3068-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3068-25-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/5060-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/5060-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5060-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5060-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5060-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download