bd808a261639523a6fe2f33594aae8399a2c1b10d1d45850ccc1181fb38334a1

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 12:31

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General

Target

2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe
Size

94KB
MD5

56998257820a17b34b37ffdd3ffe83dc
SHA1

627e450877d3e0425aae2004a74501019b7374d6
SHA256

bd808a261639523a6fe2f33594aae8399a2c1b10d1d45850ccc1181fb38334a1
SHA512

555cc7a60da6f6ab994922329732e07d0de705a765a5043d63dd6b0279fea437b5d3db8c0389bdbcd095371764091768426c7e906b81c482e9f1afeb20fc08f3
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+5:AnBdOOtEvwDpj6zG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/3304-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/740-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3304-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/3304-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/740-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3304-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002327d-13.dat	UPX
behavioral2/memory/3304-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/740-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3304-27-0x0000000000500000-0x000000000050F000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3304	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002327d-13.dat	upx
behavioral2/memory/3304-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/740-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3304-27-0x0000000000500000-0x000000000050F000-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 740 wrote to memory of 3304	740	2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe	82
PID 740 wrote to memory of 3304	740	2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe	82
PID 740 wrote to memory of 3304	740	2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_56998257820a17b34b37ffdd3ffe83dc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3304

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
94KB

MD5
d8c2a8ebbdfb280637c847a3c94e38e1

SHA1
90dfe14237a0c0505a02c8d910d9a0417bb68d04

SHA256
4bd304c270ab190254bf351ba517a8f48b92ed7615172186bdf07a3f92f08958

SHA512
6ece1e92bffe88cdccd5f139bd62d599b93d458d119884d1fbf7848d9c2e67355d50da65f0910f43437a2ff95290ab814ec43c96ba407cdeaa415c4eb243ac8b

Download Submit
memory/740-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/740-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/740-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/740-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/740-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3304-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3304-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3304-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3304-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download