f69a7465654d966d32c834609c8f44975b42d6d8dc145323fc85ef9076daf00c

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 21:37

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General

Target

2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe
Size

108KB
MD5

e40ec8e6606f9e556621251ea4a91f05
SHA1

3a746cc9bcd0e1c6ad8ec4bd65d9715d63a38b84
SHA256

f69a7465654d966d32c834609c8f44975b42d6d8dc145323fc85ef9076daf00c
SHA512

d7ae9578e7b3d32cf4a7660d61132c2c21403a241be0c12e2bae7214ebeb56ac117055da89aeb0e4736050fd8d849c88999a1c359b2d9d359a30f5ede188e20f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfE:1nK6a+qdOOtEvwDpjQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000231fb-13.dat	CryptoLocker_rule2
behavioral2/memory/1684-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000231fb-13.dat	CryptoLocker_set1
behavioral2/memory/1684-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00090000000231fb-13.dat	UPX
behavioral2/memory/1684-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4528	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00090000000231fb-13.dat	upx
behavioral2/memory/1684-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F311-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 1684 wrote to memory of 4528	1684	2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe	84
PID 1684 wrote to memory of 4528	1684	2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe	84
PID 1684 wrote to memory of 4528	1684	2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_e40ec8e6606f9e556621251ea4a91f05_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4528

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
108KB

MD5
42e1c552633d339340afe6964efc7842

SHA1
44679ead7f7260af93aff305f848281a5374f6e0

SHA256
964b15299cac84b6d3a302fae219e5a7b9c7d7e4082008db7f6ee7a9f0aced2c

SHA512
9129ca6f9131554635def063bd35f0f51ed5d5fa423264a02293f642a10ef60d9403bcd0440a016d32ffa859aab9b8aa13c5b5ef2893712761ec9e55b3743bae

Download Submit
memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1684-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1684-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1684-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1684-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4528-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4528-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4528-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download