b8e9a637a4ccd4667d56b6cea51e0e3f5e1ee513def67cad5c0c946063ba0a15

Analysis

max time kernel
138s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29-02-2024 01:45

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General

Target

2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe
Size

55KB
MD5

a241cc40ad47248ffa71f367e9b99c7d
SHA1

f58158bb72d3b1cc43177b5d7c267f3c3c8f77de
SHA256

b8e9a637a4ccd4667d56b6cea51e0e3f5e1ee513def67cad5c0c946063ba0a15
SHA512

dc2762d2207c3fe5465568ebcd514ffef28237e8ee13dd111cf34394969024aaedb64a0460b4c69065a984d99fbad6576238d4d081ed659741f9d61da9eed897
SSDEEP

768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbP/MMaB:xj+VGMOtEvwDpjubXMMaB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1580-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_rule2
behavioral2/memory/1580-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1696-52-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1580-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_set1
behavioral2/memory/1580-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1696-52-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/1580-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0008000000022745-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1580-17-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1696-52-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress

Checks computer location settings 2 TTPs 2 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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
1696	misid.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 1580 wrote to memory of 1696	1580	2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe	90
PID 1580 wrote to memory of 1696	1580	2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe	90
PID 1580 wrote to memory of 1696	1580	2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_a241cc40ad47248ffa71f367e9b99c7d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:1696

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
55KB

MD5
fb65f915921d57372296045e75541a44

SHA1
3acf4bbcc0a229e5bd78dabd93018c035b9b97e2

SHA256
cb5db18b53b807a78126018bd5c404525ded13e7fb1d57de751ac41957958489

SHA512
1c51973f9af488e7742e22aaf62a7dbc61c14499574cd857a75afdea6e6a5abdbfce715493b68ee001c2c4000ed3cf6f7c80d1cc0da8a8ebe035f298c6c3f097

Download Submit
memory/1580-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1580-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1580-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1580-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1580-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1696-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/1696-22-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/1696-52-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download