27e2d06bd818ef96f2310db2ee8d5ec73ae27c46fc13f0fa223f0fb18cbece71

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 13:25

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General

Target

2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe
Size

98KB
MD5

1035df6c5d3c42999fd62d2e86609063
SHA1

af937edbe5fd0f676b0a7390a2ec14c575341ffb
SHA256

27e2d06bd818ef96f2310db2ee8d5ec73ae27c46fc13f0fa223f0fb18cbece71
SHA512

868642fd553850ba3d7d8e1953d4a74fad8a9b97c5c012fa46e7533d3eb82b3ecdcfcd6a087fe06c5daf0e8f527989a63530590d12df9e7c2f239a01d54344cb
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKiseW:z6a+CdOOtEvwDpjcgH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023218-13.dat	CryptoLocker_rule2
behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023218-13.dat	CryptoLocker_set1
behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023218-13.dat	UPX
behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4228	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023218-13.dat	upx
behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-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 3332 wrote to memory of 4228	3332	2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe	88
PID 3332 wrote to memory of 4228	3332	2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe	88
PID 3332 wrote to memory of 4228	3332	2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3332
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4228

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
98KB

MD5
c95aca1a47d4f3102ceea36d2bc899c4

SHA1
dbf42e9e7bf8639b03358fd2e408e66ad311d37d

SHA256
06ee473696b6978aefa67ae79e2ed4b41bc6dddb93309fd7d387bf5ed05f4578

SHA512
01755fd88072f13f9585075ef3033041b14dfc36416b248854c90c97c3f64afa83fd8d39108dbfd6bc275a27012829c27e68f02285e8e903ab424cdf1738f418

Download Submit
memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3332-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3332-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3332-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4228-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4228-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4228-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download