ec8814f17a5c354f529d3014f347b014dd18f3d53e6353fc3b689e673e974f50

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 18:36

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General

Target

2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe
Size

80KB
MD5

5987848d4f12dbc1af847e8710507f9a
SHA1

dc8c2c6261dd0ee7ebac3977fd830c388c98c58b
SHA256

ec8814f17a5c354f529d3014f347b014dd18f3d53e6353fc3b689e673e974f50
SHA512

a38a244ae8dadafb2c6d1f89c401f5e0e0e4b16f7703314bc4f9cf0a565e5561e23e78a9ee70758c3804429c0f8f81adc8f39e7cbe8aca49f6f17f917acec98d
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdM:T6a+rdOOtEvwDpjNt2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002327d-13.dat	UPX
behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3780	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002327d-13.dat	upx
behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-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 4856 wrote to memory of 3780	4856	2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe	82
PID 4856 wrote to memory of 3780	4856	2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe	82
PID 4856 wrote to memory of 3780	4856	2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3780

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
81KB

MD5
416f6b4b829b6122d92caf97c82ae2c9

SHA1
e645c3b5d1fb6f09a1882cea6524efa60a389f85

SHA256
0677dc62a9b854038e6e0cd6ffefaca1155fd766714d3b1641a4129dec9b5167

SHA512
03203927635b60d78daa32d3a7d64261b44876549bd519fc0b4ddd5f59a4c4946f3156fa43ca2ce894f7fe7a4ea863fdfd31fc0334b5103c2dc419482dc872ed

Download Submit
memory/3780-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3780-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3780-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4856-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4856-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4856-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download