4d3c424d38bf25a8660768e397bfc9ce5968d7f7fc6802a62f94199c157c83ea

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 04:25

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General

Target

2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe
Size

73KB
MD5

2d1fb1ce5f88718b1f8507d2a4d8e1fa
SHA1

ab47edea897365b193b04681d0990b38899f221d
SHA256

4d3c424d38bf25a8660768e397bfc9ce5968d7f7fc6802a62f94199c157c83ea
SHA512

f392a312819b6dc46b142298180b4c0ca1911a97b4897a0f0f9c90d5e3f083f432bd59ac448bebb89b50bcfc6d5a91c6940f9b5f659b9f81a2007e56fadecce0
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs973y:C4Q2c94OtEvwDpj4H8zb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000023400-13.dat	CryptoLocker_rule2
behavioral2/memory/1464-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2916-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1464-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2916-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a000000023400-13.dat	UPX
behavioral2/memory/1464-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2916-28-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2916	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a000000023400-13.dat	upx
behavioral2/memory/1464-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2916-28-0x0000000000500000-0x0000000000510000-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 1464 wrote to memory of 2916	1464	2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe	82
PID 1464 wrote to memory of 2916	1464	2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe	82
PID 1464 wrote to memory of 2916	1464	2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_2d1fb1ce5f88718b1f8507d2a4d8e1fa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2916

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\misid.exe

Filesize
73KB

MD5
956871c3ab2d53060558ff4435292cd1

SHA1
2df69d962a6672c06a2ac4a1afd75239e82f0d2a

SHA256
e7d5195053def678e67a547c6c65d53e45ad4d00a81f6f9e86ef1d3df3ffe40e

SHA512
a3f3401dbeee7522f37bf61994cdf4a0fe452e231ac17f3f1f10f8d2133f5a110b372729cfa4d739bd9b9d968d1ecd8c3079a91e36690d32ade9c599897b661d

Download Submit
memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1464-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1464-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1464-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1464-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2916-21-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2916-27-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/2916-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download