32330823d1588e490f8fc0f85e930e3f0a6bc08dcf45405b9e20b795ebc52364

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 21:28

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General

Target

2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe
Size

86KB
MD5

27741c88c83aabf0bde8ef2fb1e83955
SHA1

89cf436b35bb501f7162cd592df589fb096af332
SHA256

32330823d1588e490f8fc0f85e930e3f0a6bc08dcf45405b9e20b795ebc52364
SHA512

221e5c02b58637d69d8bfbd2aa1ed195f4e849e54d359a62345df4079f65a81980198701b529533858ee55c8541fc22c842b58be13afd1c476781a5bbbcb4ab3
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIEkpqq:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4192-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/4192-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2040-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4192-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_set1
behavioral2/memory/4192-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2040-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4192-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/4192-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2040-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2040	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4192-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000400000001e980-13.dat	upx
behavioral2/memory/4192-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2040-26-0x0000000000500000-0x000000000050F000-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 4192 wrote to memory of 2040	4192	2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe	89
PID 4192 wrote to memory of 2040	4192	2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe	89
PID 4192 wrote to memory of 2040	4192	2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_27741c88c83aabf0bde8ef2fb1e83955_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2040

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
87KB

MD5
655d375c8c75dcbc497097a0ec4cfe4d

SHA1
f65960355bf639125df29cf766ba6b94cd1375a0

SHA256
ae1bd93a885966fb6c7225c80e4cf2351e40a68f83c472cf5ef06a24fc9c8dab

SHA512
45f0a5a391225a8ca3a170b3a97bd6e20bb893a57173c83030be0196d02727fa57cc8237aaffd803eacf97bd62289ec9cfae3e372449eda8fe913a834a16f46c

Download Submit
memory/2040-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2040-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2040-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4192-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4192-1-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/4192-2-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/4192-3-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/4192-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download