762ea74dff67dfa50870e41fca55a4d88316725f3b73d3106e5f2d3122fd61b4

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 12:25

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General

Target

2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe
Size

54KB
MD5

1aa7bd2470a31a521b37e22e93788acd
SHA1

4d9cf152b4963dedd0fb2d3a47ceece82247d1c1
SHA256

762ea74dff67dfa50870e41fca55a4d88316725f3b73d3106e5f2d3122fd61b4
SHA512

e405e0a39c1b168dd464f0d46a180371a800f8ddda1f90e7d505a5bf97972daef9905aa68255334139798db06efc428cdc520e23bb2dd5cc251c835d1e222ee8
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOkgdWz:z6QFElP6n+gKmddpMOtEvwDpj31ikgdQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4056-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000232a6-13.dat	CryptoLocker_rule2
behavioral2/memory/4056-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3492-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4056-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00060000000232a6-13.dat	CryptoLocker_set1
behavioral2/memory/4056-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3492-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4056-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00060000000232a6-13.dat	UPX
behavioral2/memory/4056-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3492-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3492	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4056-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00060000000232a6-13.dat	upx
behavioral2/memory/4056-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3492-26-0x0000000000500000-0x0000000000510000-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 4056 wrote to memory of 3492	4056	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	83
PID 4056 wrote to memory of 3492	4056	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	83
PID 4056 wrote to memory of 3492	4056	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4056
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3492

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
54KB

MD5
2cc3a64f0c807f1e952cebb534cde807

SHA1
60e73584940d26023835d5b0c69c0ce423735381

SHA256
aaa044427155fe966d75e260fb2f70818f5159c1505e4a7358b30d151509a079

SHA512
d719d30225bd1f657baba2f545a76e3f985d93218a89d23d20038354f3692e21cacde5975477712bd180df20295ab56e08aae49a4ef11b8998f109bdb42f7c37

Download Submit
memory/3492-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3492-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3492-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4056-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4056-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4056-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4056-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4056-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download