1ce7d2b24376d98f116e6a6f7fd82d94fbfdc87572b6e5e9155c9158c89204e2

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 04:16

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General

Target

2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe
Size

52KB
MD5

c4924257816e2a601fc8004fe58ff1d5
SHA1

b1edf3aaddca5318e5fe39657bb682c957ffdffe
SHA256

1ce7d2b24376d98f116e6a6f7fd82d94fbfdc87572b6e5e9155c9158c89204e2
SHA512

98dd3b7eed32fb3836204782b2dbe76f56b549cd17c5d78a06f3b351d89ef27c4c756def36cb9443694ed281402504256a5401477142a7c24a2b44bd142cc752
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOklo:z6QFElP6n+gKmddpMOtEvwDpj31iklo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_rule2
behavioral2/memory/4536-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_set1
behavioral2/memory/4536-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e970-13.dat	UPX
behavioral2/memory/4536-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4120	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e970-13.dat	upx
behavioral2/memory/4536-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-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 4536 wrote to memory of 4120	4536	2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe	86
PID 4536 wrote to memory of 4120	4536	2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe	86
PID 4536 wrote to memory of 4120	4536	2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_c4924257816e2a601fc8004fe58ff1d5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4120

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
52KB

MD5
7bdec508e66337b3f1c6f803b6b034e8

SHA1
85bfd00986967841500b5769336abe5e89a4c2c6

SHA256
210fc43bd8df783250b8f17f7bf50530a22fa61e5528499b14f378bc894571b1

SHA512
7a640b9653241f343e1b8afdb0719db08d09ed24eb8e3c30e9002c4b738e39c2c6d09f81dadec6df2abacbb4903447cb10e4885821dffbb2c2bf7440727224c6

Download Submit
memory/4120-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4120-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4120-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4536-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4536-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4536-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4536-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4536-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download