f4e09e361d12bf2a943cf21bca5b64cd1a34c685ceeced32681c2db0a2f6d9bf

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 18:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe
Size

59KB
MD5

380a8d95de3c4566d0728e0d585c2b96
SHA1

fd02cc67cf06962cb08d40455060dbfa0dfa0dec
SHA256

f4e09e361d12bf2a943cf21bca5b64cd1a34c685ceeced32681c2db0a2f6d9bf
SHA512

2735d04a48c09b68daf4321781226af0f795b57b9fe1b457290eb42291740f94fbb39259314504598fcb1f37f2fedbb2790596be6fc6319af6d887fb25ef75c7
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP3p:H6QFElP6n+gou9cvMOtEvwDpjCpVXQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000500000002328f-13.dat	CryptoLocker_rule2
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/184-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000500000002328f-13.dat	CryptoLocker_set1
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/184-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000500000002328f-13.dat	UPX
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/184-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
184	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000500000002328f-13.dat	upx
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/184-26-0x0000000000500000-0x0000000000510000-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 4344 wrote to memory of 184	4344	2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe	82
PID 4344 wrote to memory of 184	4344	2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe	82
PID 4344 wrote to memory of 184	4344	2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_380a8d95de3c4566d0728e0d585c2b96_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:184

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
59KB

MD5
d92c63d97215a6262898a9d489e643b3

SHA1
04f6809750cb290e5afc7188b005b63c3afcc556

SHA256
bfa32df3a73fcde8aa25d2f709860f7f5dbe3845c2afa128b762062f1fa3e423

SHA512
83cd51b6ca3479da8e199f54aa26152faff133c5b520642fdc92406c36cdf38465458cd2de223730e09dc4ad782edce3f2604cee16981b7e32230eed413acfff

Download Submit
memory/184-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/184-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/184-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4344-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4344-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4344-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download