e4cede9cb6effff9d55c757428ecffc48d761d17dd299ee0e871c487df3a6ef0

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 06:26

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General

Target

2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe
Size

78KB
MD5

3c0e33648862b3bc08bd64628558759a
SHA1

75174181219726f2fdee887dd507818b80d30cd8
SHA256

e4cede9cb6effff9d55c757428ecffc48d761d17dd299ee0e871c487df3a6ef0
SHA512

05580e1b9c8de6b9d8ba6c17048fc82d31f84ad78ab435ed5003e730e26f1a1a272c6899fc00e87d1d68f25bbe48177ae0590f548896ee820a764ab507421b55
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuS8:T6a+rdOOtEvwDpjNcA8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2492-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_rule2
behavioral2/memory/2492-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4300-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2492-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_set1
behavioral2/memory/2492-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4300-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2492-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e9a0-13.dat	UPX
behavioral2/memory/2492-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4300-25-0x0000000000500000-0x0000000000510000-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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4300	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2492-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e9a0-13.dat	upx
behavioral2/memory/2492-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4300-25-0x0000000000500000-0x0000000000510000-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 2492 wrote to memory of 4300	2492	2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe	91
PID 2492 wrote to memory of 4300	2492	2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe	91
PID 2492 wrote to memory of 4300	2492	2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_3c0e33648862b3bc08bd64628558759a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4300

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
78KB

MD5
39c61f710940310f5a6ff19a54a025f3

SHA1
d2e5feeabb775807344c036505b5a0520003a525

SHA256
1f02ab43a4d1a16f9fc7466e53cc926b70a9226313e393bb7ba0ea9dda03cb5e

SHA512
5b4e7a3121192ecbeb68ce3966d2cb0acc1aa6e2e4a690afa213011d619abef2869efeb58ddf83576a53381d533512e62b9c52685679b7bd534356d6720c4072

Download Submit
memory/2492-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2492-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2492-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2492-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2492-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4300-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download