2880853b3ea42a329d0beda269bfee3b5426d735a1566ad377c5cda5ddf22d3c

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 15:47

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General

Target

2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe
Size

59KB
MD5

d78a75df911cedf45c9b11d98bb0308f
SHA1

74f2c8d1e1d23a3534c5a644c0fb0eb2cd20c8ee
SHA256

2880853b3ea42a329d0beda269bfee3b5426d735a1566ad377c5cda5ddf22d3c
SHA512

ce2d47a61a1c85a9844d096473c8adafb4b9f81d6819a330db62515efb4618c2fdcb7864083812ea784621c67e656784f4d522994e1c7334ae4bc5c311be3e95
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5app1J7A:z6QFElP6n+gKmddpMOtEvwDpj9aYaz7A

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_set1
behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2680	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-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 384 wrote to memory of 2680	384	2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe	86
PID 384 wrote to memory of 2680	384	2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe	86
PID 384 wrote to memory of 2680	384	2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:384
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2680

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
59KB

MD5
aa05f1d2bc2c874bf5e3f82bf3e43e82

SHA1
8ac825bc85a87d6e5ed3643ea840395b54ad08dd

SHA256
78201df18644b3d9cdd0cf8cc1321aa409d65d26f16bd79bd98d991552097835

SHA512
412242beb64a40c76a1f40cc39061f452457eaab734a9fdc32127642e0ff380007fd4d8b3aab2a0fbe2c91cb7a3d6fa73993e30aa347d439cecd29109884ace0

Download Submit
memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/384-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/384-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/384-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2680-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2680-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2680-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download