a6f0f0c14a4dde07b3d6d9706d821b3cfd7dda7b73a380d3064b466a8be8f048

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
25/05/2024, 21:35

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General

Target

2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe
Size

91KB
MD5

ca4069d4ba76faa3678f3d25e8347172
SHA1

ca3b97b03b3b5049d73cde2111821ba53615f821
SHA256

a6f0f0c14a4dde07b3d6d9706d821b3cfd7dda7b73a380d3064b466a8be8f048
SHA512

d4942ba428d5c5995be9eea24a1aa2c377f5ba408729812e34fe075d738e55802ba37b36b4809e2b437cdbd3a68c94dcb22c5abe8d7511d902dc125976116428
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/U:n6a+1SEOtEvwDpjYYvQd2P7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002340d-13.dat	CryptoLocker_rule2
behavioral2/memory/1824-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3740-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1824-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002340d-13.dat	CryptoLocker_set1
behavioral2/memory/1824-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3740-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1824-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002340d-13.dat	UPX
behavioral2/memory/1824-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3740-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1824-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1824	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002340d-13.dat	upx
behavioral2/memory/1824-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3740-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1824-27-0x0000000000500000-0x0000000000510000-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 3740 wrote to memory of 1824	3740	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	82
PID 3740 wrote to memory of 1824	3740	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	82
PID 3740 wrote to memory of 1824	3740	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1824

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
91KB

MD5
468e755d8fc9f156347c0c720edce267

SHA1
75758f73e2df04730ebfa1b97a2ce2a5871027e6

SHA256
6652a4c46e641e98f487eb3a33074ef3ae24057d7ff36a955dd16adeb8e5516a

SHA512
4c64743d342ae4b5a91a3b768f38430bf797a399057507582f41e51bd3f25a80a8f38917000ab355fc17ee893118ba5f8ed510f26f7c9bdd71ffe5a1ce781913

Download Submit
memory/1824-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1824-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1824-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1824-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3740-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3740-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3740-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3740-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3740-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download