790683a4365ff95b5013b307894ef0da926543691ac0e75b0de75e73021e17ad

Analysis

max time kernel
148s
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
29/05/2024, 15:24

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General

Target

2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe
Size

65KB
MD5

0f4b0c4dc69f56667568d60cc3e654d0
SHA1

d55316b849b8da8a35083f884893275ec696abec
SHA256

790683a4365ff95b5013b307894ef0da926543691ac0e75b0de75e73021e17ad
SHA512

aabd7bd49d69fb689f0a289c9d1a5630b5cd62d18ef97c77d5ec2c2b55fab876feda6c6e1fccad3fd196a1a65a1fc8071ae55284df6b7cd725b934c491fde2de
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiO:BbdDmjr+OtEvwDpjM8b

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002297e-13.dat	CryptoLocker_rule2
behavioral2/memory/2912-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2636-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2912-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2636-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2912-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2636-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002297e-13.dat	UPX
behavioral2/memory/2912-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2636-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2912-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2912	asih.exe

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 2636 wrote to memory of 2912	2636	2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe	81
PID 2636 wrote to memory of 2912	2636	2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe	81
PID 2636 wrote to memory of 2912	2636	2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_0f4b0c4dc69f56667568d60cc3e654d0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2912

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
65KB

MD5
3f46a1c1da092d92bcbf1e8a03279036

SHA1
16984a2c6cdd5614cf7c30bc4065fdd3517e1a5c

SHA256
37dd211053ed5170e99bdea90739863790c838186df9b7b5bdbc782405db0caf

SHA512
9bda08ba7f051e773c8ec9a592f4a8dfc03143b009bf21ff444748cef058aa1783102b3fe7b9ebe4cb4824b60da5f2d969f55dd8601bb33b6091e2648a21256a

Download Submit
memory/2636-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2636-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2636-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2636-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2636-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-22-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/2912-21-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2912-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download