f9b5b2071b16624314351c159764e828ee5fc9d262d962fc805db2fe6c03421d

Analysis

max time kernel
157s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 22:56

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General

Target

2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe
Size

106KB
MD5

75e5201aaf6424ad87b1b1a8b9ba5c71
SHA1

112390c27bd2dfb8c8359eee2f2c26823e3167a5
SHA256

f9b5b2071b16624314351c159764e828ee5fc9d262d962fc805db2fe6c03421d
SHA512

4b62a0ae4721aa09257ca54857d7c7c079347b224ae36d1d5cb445426a54e78615c45b96daf2fb8968831f9bbb687998960b8168d3cd872e3dec8fe5a6d3fc94
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gksax:1nK6a+qdOOtEvwDpjo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1560-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023221-13.dat	CryptoLocker_rule2
behavioral2/memory/1560-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2416-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1560-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023221-13.dat	CryptoLocker_set1
behavioral2/memory/1560-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2416-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1560-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0007000000023221-13.dat	UPX
behavioral2/memory/1560-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2416-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2416	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1560-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0007000000023221-13.dat	upx
behavioral2/memory/1560-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2416-26-0x0000000000500000-0x000000000050F311-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 1560 wrote to memory of 2416	1560	2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe	89
PID 1560 wrote to memory of 2416	1560	2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe	89
PID 1560 wrote to memory of 2416	1560	2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_75e5201aaf6424ad87b1b1a8b9ba5c71_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1560
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2416

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
106KB

MD5
0318ba431543e032935dc77601a4f5db

SHA1
043837a4ea4622895b08cab2cc1d46afcc4e26de

SHA256
da4b550287eddeef250beeb3a8cd1a451c6fedd4d0ca1e87a0db83f957be8924

SHA512
f9422b5a967a68be79cf8aa472311c13ba177744c7aa45592f55f3ba7ae10c5ee1b18a9d3aa39f41767138479a6b74b33b5f28e899ed2d81f7481cfd2776740b

Download Submit
memory/1560-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1560-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1560-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1560-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1560-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2416-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2416-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2416-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download