61c51af528f952937d554ef151bf8cb46964520e6a3c35d0b14d3a5fa80484d1

Analysis

max time kernel
149s
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
04-06-2024 19:01

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General

Target

2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe
Size

50KB
MD5

9370a9c656e08f913ae458212025b8c1
SHA1

8d6688706b3cb868719b0666e1da3915978b4c7b
SHA256

61c51af528f952937d554ef151bf8cb46964520e6a3c35d0b14d3a5fa80484d1
SHA512

c44b0fa8bc990ef3724477b7530f8e24bc91f5e98b99a6499019ec2f517329c85525d45a48219f16c565821f7fb2f6c4504f9cc8df4e9b741e646fbbb2045537
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mocca:qmbhXDmjr5MOtEvwDpj5cDtKkQZQQf

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023289-13.dat	CryptoLocker_rule2
behavioral2/memory/1496-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1008-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1008-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1496-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1008-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1008-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023289-13.dat	UPX
behavioral2/memory/1496-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1008-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1008-27-0x0000000000500000-0x0000000000510000-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	2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1008	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 1496 wrote to memory of 1008	1496	2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe	80
PID 1496 wrote to memory of 1008	1496	2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe	80
PID 1496 wrote to memory of 1008	1496	2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_9370a9c656e08f913ae458212025b8c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1008

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
51KB

MD5
987c666cd2a76f163a066a2e7e31d241

SHA1
943a84400fc5f6a2040322720dabef799096d3a6

SHA256
c65df7d36506a85324cea0811870c6b1b5fa30b324c1e57fde5e0d6030f274cd

SHA512
ec7bc58040bd41ec8b24c34578603150d73c2b196867a1e53250cc7c8ab42d42d253c582eafc566ae0f572367a135bd5c528f0cd663c93bba17e6d7b4f7073b6

Download Submit
memory/1008-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1008-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1008-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1008-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1496-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1496-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1496-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1496-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download