914fc8daed54a7576e2e0720b5f81ba04d2f514d6df3fc0438bd5a3ca85a183d

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 19:23

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General

Target

2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe
Size

126KB
MD5

53f49566792981a0e2946796c6ee963f
SHA1

446b60aa616ff6eb1c33f00de53beeb863c41ebb
SHA256

914fc8daed54a7576e2e0720b5f81ba04d2f514d6df3fc0438bd5a3ca85a183d
SHA512

42bdd9dbf4241b78855af05e49989bc367fc2383052983cc0fd965c0b705655d92fd75a189541e64ef57dd335c1c6eab14cd4883e3e546c50df46ead534be493
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eI4t:AnBdOOtEvwDpj6zXt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5000-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/404-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5000-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/404-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/5000-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/404-25-0x0000000000500000-0x000000000050F000-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_53f49566792981a0e2946796c6ee963f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

404 asih.exe

pid	process
404	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/5000-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/404-25-0x0000000000500000-0x000000000050F000-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_53f49566792981a0e2946796c6ee963f_cryptolocker.exe

description	pid	process	target process
PID 5000 wrote to memory of 404	5000	2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe	asih.exe
PID 5000 wrote to memory of 404	5000	2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe	asih.exe
PID 5000 wrote to memory of 404	5000	2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_53f49566792981a0e2946796c6ee963f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5000

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:404

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
126KB

MD5
936c915139c356cb95f1b2782ebd7732

SHA1
06df85b1a495b028fa97bf3674954b44e38a7470

SHA256
ddf818a9934d86f5a266b7e736a24aa2226da5fc1ecd897c1c3d208237ab5fc6

SHA512
40e8973caeecffc8edeeb01fd878825ce4fcfa74d680bc74d3d54cfe582b5bac14185e00e63f6fe890b08ff7c445aa65030fcaa96938b90687dcaa83e87a22b7

Download Submit
memory/404-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/404-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5000-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5000-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5000-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5000-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/5000-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download