b536b8b634275a29b792bec434b1151f679e502092bd9e2a4460134cf42a2d87

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 01:43

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General

Target

2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe
Size

63KB
MD5

939eb00571436221b51463e32cc74bf7
SHA1

86a0592fd0c59497fe8a3d96a7b3f1af1eb7aa4b
SHA256

b536b8b634275a29b792bec434b1151f679e502092bd9e2a4460134cf42a2d87
SHA512

cf13b8050334096d6e55bf6f2f318750e9ba064c2808b65eced7b82d1271b817f8d6972218b3b88fc56ff62cd2cd413db7e7f99e8e8c13d03349699f9633f9e9
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5kH:zj+soPSMOtEvwDpj4kpmeLmQH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023207-13.dat	CryptoLocker_rule2
behavioral2/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4712-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023207-13.dat	CryptoLocker_set1
behavioral2/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4712-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2900-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023207-13.dat	UPX
behavioral2/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4712-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4712	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2900-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023207-13.dat	upx
behavioral2/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4712-26-0x0000000000500000-0x0000000000510000-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 2900 wrote to memory of 4712	2900	2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe	84
PID 2900 wrote to memory of 4712	2900	2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe	84
PID 2900 wrote to memory of 4712	2900	2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_939eb00571436221b51463e32cc74bf7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4712

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
63KB

MD5
81440861856a5053a07175c75a6f0bd8

SHA1
f5d8e83cf3a672f9f7a87dcab57f4b3ca3bc50f6

SHA256
20c104ebd87e55d0ad3caf755ef96c2e714d6eb8e7fea70012acdd5051aa6e45

SHA512
ccbcc815e0c775e95ffdb151b06ebc327f9524168bf27845d24466d8e945302ca5e7cffd372416b146dc2b909178da07f64b9ee71f74b02c0447cb7ddccbd6e7

Download Submit
memory/2900-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2900-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2900-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2900-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4712-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4712-20-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4712-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download