67d8b3a6b9e2eb2526f06ad3cfc1ed84598a45a08c40448d42031980b1cdcec3

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-03-2024 04:01

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General

Target

2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe
Size

101KB
MD5

adfc4e9e1d1854c084ef009d7b666d00
SHA1

53dcce6a31a515a2a40acaee0fc7939b36cbbb60
SHA256

67d8b3a6b9e2eb2526f06ad3cfc1ed84598a45a08c40448d42031980b1cdcec3
SHA512

955973da310845acbb8f8fdb990f31fbbf7aa135a4827b9d5433d42e1b31aa6333c333fc9d967057d13a805a2d092f1a303b32c2582cea9312f527a02d71f0f1
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeBq:AnBdOOtEvwDpj6zx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1864-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002321f-13.dat	CryptoLocker_rule2
behavioral2/memory/1864-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4788-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1864-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002321f-13.dat	CryptoLocker_set1
behavioral2/memory/1864-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4788-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1864-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000900000002321f-13.dat	UPX
behavioral2/memory/1864-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4788-26-0x0000000000500000-0x000000000050F000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4788	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1864-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000900000002321f-13.dat	upx
behavioral2/memory/1864-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4788-26-0x0000000000500000-0x000000000050F000-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 1864 wrote to memory of 4788	1864	2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe	86
PID 1864 wrote to memory of 4788	1864	2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe	86
PID 1864 wrote to memory of 4788	1864	2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_adfc4e9e1d1854c084ef009d7b666d00_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4788

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
101KB

MD5
74ee9a56ad3dd42d9ae16b5531156dd2

SHA1
6ee3771594bf9ecf0623f7887a1606b0bcad280a

SHA256
230bed38283b34bc1389341d32c0b91782ba8ffa00f3913b5c68703d2a514a53

SHA512
ed25c7d35037b6447053365df98aa42f7b987e0d02f311c5da987d0f4ef08e55b1869f81416a783de96bf2841ced2850480d8f453260640fc2d3ee2636050412

Download Submit
memory/1864-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1864-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1864-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1864-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/1864-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4788-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4788-21-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/4788-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download