9ad5ecbe456b85a26b97b775353dfc74cd4c678f19febee7ed46874e7fb0e1b3

Analysis

max time kernel
149s
max time network
152s
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, 17:55

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General

Target

2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
Size

77KB
MD5

bb8bdc9688621afd9fdc7f163eae51ee
SHA1

d67c6c3e935625d027ab5611d332ed505dbc071d
SHA256

9ad5ecbe456b85a26b97b775353dfc74cd4c678f19febee7ed46874e7fb0e1b3
SHA512

8a079160bb57b94ef566595fb4a76827900e34960832c475c010dfa2d0bae76c7b3764ec90bdc067918e36d414aeeaefd2b0b99dddc5d2297946b9d6abad2fd8
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxzV:T6a+rdOOtEvwDpjNtHPy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000023401-13.dat	CryptoLocker_rule2
behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a000000023401-13.dat	CryptoLocker_set1
behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a000000023401-13.dat	UPX
behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4868	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a000000023401-13.dat	upx
behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-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 1256 wrote to memory of 4868	1256	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	89
PID 1256 wrote to memory of 4868	1256	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	89
PID 1256 wrote to memory of 4868	1256	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4868

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
77KB

MD5
af3d45d5d91a68ef84c790824d3149c5

SHA1
f93b1bc76647e8dafe13e12707122850e6f214a3

SHA256
3d770b3cd152bee6dc399b95a5d8da207c1c61269ce7d275b93a1ec07ee3ec6e

SHA512
9e040c024028115884ff81f5ca1048b71157c036c4f1a88bcac70738afd8311d58e0e31e846f0e4825f3de450df59562629548fc33e5cc67ffdb9d88d8818fe9

Download Submit
memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1256-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1256-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1256-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4868-20-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/4868-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4868-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download