76079ed8cd2d845810cdbd37d0db94c54fd876ad35d32409449ca281c174712a

Analysis

max time kernel
149s
max time network
150s
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, 01:57

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General

Target

2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe
Size

108KB
MD5

eca5a409a32cafed02b31a86dfcfcb28
SHA1

6efc91b5e76d82c2b23a3541f515e6d4c623077f
SHA256

76079ed8cd2d845810cdbd37d0db94c54fd876ad35d32409449ca281c174712a
SHA512

6d5421c4c9e853b9d649784623e203be5ac3c4cd5edf2f3ad2566600d79d371ee9564d491af3359363074573582de882c38336a1c929e5b62c7a8df97d4951bf
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgEneo:1nK6a+qdOOtEvwDpjD

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_set1
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
456	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000400000001e980-13.dat	upx
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-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 884 wrote to memory of 456	884	2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe	90
PID 884 wrote to memory of 456	884	2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe	90
PID 884 wrote to memory of 456	884	2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:884
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:456

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
109KB

MD5
1742905f22f91f34cde14f497d3e7978

SHA1
f86e9b0fe758963e578c0028ff5677fdc6bb0896

SHA256
8624ff6d7475152890f9a51a30387f598ca6962eb671c8caee9cefe3f31e5b50

SHA512
4068440e6817d0f192a382ffae4d44a465a527408f06ea324d659a5a608420a6badf4bbb80fb89e414fb4c332d0644a9bf47d18348f136459e850097b28e381d

Download Submit
memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/456-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/456-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/456-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/884-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/884-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/884-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download