7c8b3eb322d37267f7decf820efa4a0316324c5ae65f1cb750680da85e77b41a

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:42

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General

Target

2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe
Size

55KB
MD5

87edf0792c008aca8dba2811c94acdbc
SHA1

8bc48b35c12911c573908bb223c81294cbf5a629
SHA256

7c8b3eb322d37267f7decf820efa4a0316324c5ae65f1cb750680da85e77b41a
SHA512

5c9ba93ae58f43c71d443bb1179710a923a0abc2b91444efd0dbbb88881d30b7c55844420d3375a03dc2334157f2d85298e2294c05e38a61034497ba4f2ceb82
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61l:BbdDmjr+OtEvwDpjMz

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2892-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2892-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2892-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2892-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2892-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-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:

2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3520 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3520	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe

description	pid	process	target process
PID 2892 wrote to memory of 3520	2892	2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe	asih.exe
PID 2892 wrote to memory of 3520	2892	2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe	asih.exe
PID 2892 wrote to memory of 3520	2892	2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_87edf0792c008aca8dba2811c94acdbc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2892

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3520

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
55KB

MD5
e427ce7847f8dddcf79cf2731482c1cc

SHA1
2be9959aeda0bd4a5cf833c0d6c800ceafbf7704

SHA256
325d9d9bb2e44e01b64701aa85dff85584d169974a073f8d76e7fca174f10218

SHA512
0773b669d0f54b88f9b68efe2f59fe7fe14b58cf2da64175578b32b104d4a349367bd360308739249fc2f410f4733e549f83fdcd0d50bf595fde36ee74fdcaf5

Download Submit
memory/2892-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2892-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2892-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2892-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2892-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3520-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3520-23-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/3520-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download