1119cde59a716bd608c074251aee347bfda1916490d158729a8da8e0734642d2

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2024 03:32

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General

Target

2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe
Size

95KB
MD5

71a450346fce33565c8eb7c2ccbe23ec
SHA1

e99708959eeb654515d330ddd0e9de9ecb512357
SHA256

1119cde59a716bd608c074251aee347bfda1916490d158729a8da8e0734642d2
SHA512

2bfc9df8daf3a9b6bc619693286bbe293b997f546e339b3c699778dcf5ecf07adcde92ebeca1d23430cfb19ebe873cc24012577c1bf1b2b55e2031acfac7fa62
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01h+/:AnBdOOtEvwDpj6zw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023242-13.dat	CryptoLocker_rule2
behavioral2/memory/4864-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2272-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023242-13.dat	CryptoLocker_set1
behavioral2/memory/4864-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2272-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023242-13.dat	UPX
behavioral2/memory/4864-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2272-26-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2272	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023242-13.dat	upx
behavioral2/memory/4864-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2272-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 4864 wrote to memory of 2272	4864	2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe	86
PID 4864 wrote to memory of 2272	4864	2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe	86
PID 4864 wrote to memory of 2272	4864	2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_71a450346fce33565c8eb7c2ccbe23ec_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2272

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
95KB

MD5
51794a66908b2e93eeb372dd6c4baeb4

SHA1
1d2bd2ef9d5aaf998c7532ea9fc0f97e1828f699

SHA256
e93d3c8b1719da622bbf519de219a9c4cabf5fcf406d0738b92e8c77df6195f2

SHA512
c78d7d0e29fcbea57be7390243160ca2dc4557864feaae0143a851481710dee856dfc6aafc322227a6a8bb26990e522637a053c23312c808fe464bf73f0715b8

Download Submit
memory/2272-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2272-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2272-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4864-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4864-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4864-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4864-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4864-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download