c58a25a4d00c0dba3232c97c9813d3dc6f1eb0666cf556aae59c83f876029b0e

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 01:42

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General

Target

2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe
Size

62KB
MD5

99cf265bfcdc606e7eec424693ba3738
SHA1

83a50c9089b4fc1ccf8daa0a0de034e436be1f78
SHA256

c58a25a4d00c0dba3232c97c9813d3dc6f1eb0666cf556aae59c83f876029b0e
SHA512

d72900ef01d5df6358adea8a351967221c09e36b4403a4c37eb6db2837d1697bfd4f09be3f30af914dc369d803cdcb26177695361ac1463317910f52de064a8f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8M:1nK6a+qdOOtEvwDpjk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023235-13.dat	CryptoLocker_rule2
behavioral2/memory/3692-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3964-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023235-13.dat	CryptoLocker_set1
behavioral2/memory/3692-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3964-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0007000000023235-13.dat	UPX
behavioral2/memory/3692-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3964-26-0x0000000000500000-0x000000000050F311-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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3964	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0007000000023235-13.dat	upx
behavioral2/memory/3692-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3964-26-0x0000000000500000-0x000000000050F311-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 3692 wrote to memory of 3964	3692	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	84
PID 3692 wrote to memory of 3964	3692	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	84
PID 3692 wrote to memory of 3964	3692	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3692
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3964

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
62KB

MD5
7340135fc85db5a113a994734ec46460

SHA1
6d35ee8176f93315e5d1649d2662edd4e7295d17

SHA256
bbbb06dd888cb5826cc77d3213723c1b67701ce6ec85b2ef8159685afbd81ba3

SHA512
d8da0a08f23f8f9ba1f00769df278e6d8b6e3e7ca41acf5850cd5e5a9f8f65cc178a347f3b3938e4b2dc407e23c3a0f664c9285dc31a5340ab64db65b9b28499

Download Submit
memory/3692-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3692-1-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3692-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3692-3-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/3692-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3964-19-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/3964-23-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/3964-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download