a0b970652acd83599702e83428ea1b75ccffdd51aac1b1613138ff05d6c20b0d

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:33

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General

Target

2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe
Size

91KB
MD5

86471c74a1506060dc6af6221aa5dc04
SHA1

6d5bf91eb1b6847bb091cb056acfe1513ce9606d
SHA256

a0b970652acd83599702e83428ea1b75ccffdd51aac1b1613138ff05d6c20b0d
SHA512

10bc54d8ba1823428ba6aff6cd74e59e87927018c3bbfdd562f3c25946eb5544648e43d302bc230ca5b18d910fd4cb10f5a4cfa7777cba7a52a5bec46801bdd8
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/Dx:n6a+1SEOtEvwDpjYYvQd2P2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3608 asih.exe

pid	process
3608	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe

description	pid	process	target process
PID 2992 wrote to memory of 3608	2992	2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe	asih.exe
PID 2992 wrote to memory of 3608	2992	2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe	asih.exe
PID 2992 wrote to memory of 3608	2992	2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_86471c74a1506060dc6af6221aa5dc04_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2992

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3608

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
91KB

MD5
192795b6db52dcec79f730d0a908decb

SHA1
1b102b07e2328e6d1987968c0c3954c84b2154b8

SHA256
f166632f7778511f237edd4de1c46d9f0cdd3b0ebca83aa3df3d0c9851bfcd39

SHA512
7ef07876476a4f2da15c66cba15724ab35957a60b90657aa1e55d51fe0600c6953b60101e4777ca037fb4ff23aadec19c279b945a5c92aa548d0a3b963378b16

Download Submit
memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2992-2-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/2992-9-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3608-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3608-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3608-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download