18ba12b21d2cdb30dc438e15f88b6453386eaa9af790a4eb5ba8f809ae1f2fe6

Analysis

max time kernel
136s
max time network
149s
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 20:23

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General

Target

2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe
Size

71KB
MD5

12b9b777b60f977d397608c4792b2f1a
SHA1

abd2774d44a63b0db178caa3a14ec00218ae9249
SHA256

18ba12b21d2cdb30dc438e15f88b6453386eaa9af790a4eb5ba8f809ae1f2fe6
SHA512

bb0c6de5298be7b0be27ad47cb3babd953c799c4579392dea5360f1937da0c2cb2d7eded769d535d202229207a1be9e70b5d57dff844b562d3a20ec12696ba91
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalel:1nK6a+qdOOtEvwDpjJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2112-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2112-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4400-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2112-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2112-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4400-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2112-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2112-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4400-26-0x0000000000500000-0x000000000050F311-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

Processes:

2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4400 asih.exe

pid	process
4400	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2112-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2112-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4400-26-0x0000000000500000-0x000000000050F311-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

Processes:

2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe

description	pid	process	target process
PID 2112 wrote to memory of 4400	2112	2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe	asih.exe
PID 2112 wrote to memory of 4400	2112	2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe	asih.exe
PID 2112 wrote to memory of 4400	2112	2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_12b9b777b60f977d397608c4792b2f1a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2112

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4400

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
71KB

MD5
4c1937b35d4e35a221c4d3b9f919e7d4

SHA1
33de8348b0a266cd8a343de19e3e59efcea89d48

SHA256
5720cfc9dadbd4573e558cc2c7050ade1de3d42927e2f0c4fb76e1435a02a9a3

SHA512
42c35e5feef22827cc26d39dbf77170a1b6beefd3fa7934f519b261d41e6b2fa9c5a1d0d72e255bad8220445b1b8ee905e3f6bba7cc82a699f7d9894c3207281

Download Submit
memory/2112-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2112-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2112-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2112-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2112-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4400-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4400-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4400-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download