4105ca482dae3c6fba5eb44df4aec3795de037b52ba80f0973dd01c85b3cb88f

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24-04-2024 01:36

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General

Target

2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe
Size

38KB
MD5

edd9166edbf6fbc22b15afc7f9b8bf90
SHA1

e36cb39d54bb3b6cd83351c4affba09fd2210ee5
SHA256

4105ca482dae3c6fba5eb44df4aec3795de037b52ba80f0973dd01c85b3cb88f
SHA512

5943cd0696b6027166daabdd4f4743405f5863fc2d4e7b9a145aec54e9d1b9cba25152a07e72532361f46d56f58441c2fcc5a6014bad7cc3a39e16a9c3dea31d
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYR:qDdFJy3QMOtEvwDpjjWMl7T0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_rule2
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2436-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_set1
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2436-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e9b1-13.dat	UPX
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2436-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2436	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e9b1-13.dat	upx
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2436-26-0x0000000000500000-0x0000000000510000-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 4504 wrote to memory of 2436	4504	2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe	86
PID 4504 wrote to memory of 2436	4504	2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe	86
PID 4504 wrote to memory of 2436	4504	2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_edd9166edbf6fbc22b15afc7f9b8bf90_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4504
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2436

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
38KB

MD5
7cde37603622f392ac205c004cae4f0c

SHA1
7f3d3dbf4e6a44e969db39a2d086e7d2eb6fdd52

SHA256
b3e323839fe7e640be1720479e5da387be8fe029de198ca64d53a8aef7e4a60d

SHA512
8d868828618087a2c3cb212c7f6e02d8f66c20a6acc8208d05ac4deff028cd283bf0e8410995d48fc0d95d36cb22ba0d3b5027972e0037870bcf6f734de18077

Download Submit
memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2436-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4504-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4504-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4504-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download