bd7a7eb2aebec0e58e4913071727cbf165001d5a1d694d73547f0ad663b2f289

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 18:28

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe
Size

76KB
MD5

777903901feda766075eaba29487c4e1
SHA1

9b825bfd74e16e4476ff715522903fa935517a4e
SHA256

bd7a7eb2aebec0e58e4913071727cbf165001d5a1d694d73547f0ad663b2f289
SHA512

49da4a38800882e083c6f035143203173b9e60d413ec1c9d8b85e5870a7d1b8af5846187d8ea1b20a176fd8316b44a79b4930fd6407bc64bba350ca886fac5ef
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUx/:T6a+rdOOtEvwDpjNtHPI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3092-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000226ec-13.dat	CryptoLocker_rule2
behavioral2/memory/3092-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4348-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3092-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000226ec-13.dat	CryptoLocker_set1
behavioral2/memory/3092-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4348-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3092-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000226ec-13.dat	UPX
behavioral2/memory/3092-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4348-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4348	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3092-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00090000000226ec-13.dat	upx
behavioral2/memory/3092-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4348-26-0x0000000000500000-0x0000000000510000-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 3092 wrote to memory of 4348	3092	2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe	89
PID 3092 wrote to memory of 4348	3092	2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe	89
PID 3092 wrote to memory of 4348	3092	2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_777903901feda766075eaba29487c4e1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3092
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4348

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
76KB

MD5
c52d30940d8176460bef761a1ff8ce08

SHA1
f0ee3f566d87074ce596c82b780fd83d20784d2a

SHA256
45579996fe1a9a50a56e2ac4edf5a4c616dffd6f0d746756abf43d4e115e2f05

SHA512
9fef372f7d04a84e5b07e66e5aade3dd3b95b2525c9ec220ff28366ed2ee5582e464f3219f0af361d450cfd78b225809d6fad575e2e4580bf4eaf75c5347ef3b

Download Submit
memory/3092-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3092-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3092-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3092-3-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3092-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4348-19-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4348-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4348-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download