072be7ebf1291dcae46879c9a38d375541148cf47f0c1bade7cfa658e98165aa

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 22:29

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General

Target

2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe
Size

49KB
MD5

450bc0b53e286bcf657a441335fbcf31
SHA1

c1777f6fe28bc3d838c5c2b238f4d779913647b6
SHA256

072be7ebf1291dcae46879c9a38d375541148cf47f0c1bade7cfa658e98165aa
SHA512

fd64dcd4b8964388de4b3bec174b56c0c820105dc83d1d5ef8d7e2a092c95c0ad294d937fbee142306cf12d7bbe4372c7e679b6e72fa7b690a802a90a5687a42
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Moccj:qmbhXDmjr5MOtEvwDpj5cDtKkQZQV

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1124-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1124-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3564-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1124-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3564-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1124-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1124-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3564-27-0x0000000000500000-0x0000000000510000-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:

2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3564 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3564	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe

description	pid	process	target process
PID 1124 wrote to memory of 3564	1124	2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe	asih.exe
PID 1124 wrote to memory of 3564	1124	2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe	asih.exe
PID 1124 wrote to memory of 3564	1124	2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_450bc0b53e286bcf657a441335fbcf31_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1124
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3564

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
50KB

MD5
e883c26bb5b1ac3aca370c6607bc85a9

SHA1
228cf3994ccd85fb0fd2d5eb814d2b948871697a

SHA256
0e65051fdbef88c9fd393d9ce5dca75255b454b6bbc84fdf1dad21fb5897ec95

SHA512
2210d84782db5c27e0d716d8d34ffdc9d2131f25664e442866c46c098a2418d561ec17cedd7afb7fec1ea37de168a05fdf0c2b245ece215fdc0bf79c8dce42e6

Download Submit
memory/1124-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1124-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1124-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1124-8-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1124-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3564-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3564-20-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/3564-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download