fee3ecddec1ef9e4b660590932356243e0dd37a66b6e5cba9c3412962f2f02c9

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16/03/2024, 09:56

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General

Target

2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe
Size

66KB
MD5

d3fa2c796e10533b4c7a309d9942e21c
SHA1

e870380a91b7714d5c9dfd4ac8a595ef4fbfea2f
SHA256

fee3ecddec1ef9e4b660590932356243e0dd37a66b6e5cba9c3412962f2f02c9
SHA512

b282846b07303e83f09efe025b00fd3eb051f6d80513fef19c6eb34163c941a3f3dbdccb133bd40262728c4bbab8a82af005b376505d94b9104e821a1f09378a
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUa1Fy:T6a+rdOOtEvwDpjNS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_rule2
behavioral2/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4012-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_set1
behavioral2/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4012-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e5eb-13.dat	UPX
behavioral2/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4012-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4012	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000001e5eb-13.dat	upx
behavioral2/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4012-26-0x0000000000500000-0x0000000000510000-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 3040 wrote to memory of 4012	3040	2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe	88
PID 3040 wrote to memory of 4012	3040	2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe	88
PID 3040 wrote to memory of 4012	3040	2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-16_d3fa2c796e10533b4c7a309d9942e21c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4012

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
66KB

MD5
ae1e90a3a847b2a053bf203bc8f862df

SHA1
e676b6c8d94f06eef4b814ee9a74d4004a33651b

SHA256
37cb054df0476c74b67b98a1371ce2106f21fc6b3f8f10c478eca734e16244eb

SHA512
4eaef16226621f61ac87fcd62138c45303b9d7024d8256058f2275684d98ec117b61e87258d5d0d15372156bdd51d1c580ab5e5bf05bc0513c4051aa01ae390a

Download Submit
memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3040-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3040-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3040-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4012-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4012-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4012-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download