20e1c3a400fac7ac979c27f4121bceb07413546f909d1d9eb1471fb71b13e7a5

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-03-2024 05:27

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General

Target

2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe
Size

94KB
MD5

1dfcb2e620b48d34de4b004c6ed905a0
SHA1

cf299e566b7296a0a50f7c94ba4870e3ac4c1e5d
SHA256

20e1c3a400fac7ac979c27f4121bceb07413546f909d1d9eb1471fb71b13e7a5
SHA512

fda4e25d65a1c089a387239c841a8c9fba1926b0682c8ccb7475c0f7577b89da32dfdf541e0e7781692a5ead9ed988c9622a9c8e4ca749552509268f9a748726
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/TB:zCsanOtEvwDpjB9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1840-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001000000002313c-13.dat	CryptoLocker_rule2
behavioral2/memory/1840-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/852-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1840-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001000000002313c-13.dat	CryptoLocker_set1
behavioral2/memory/1840-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/852-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1840-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001000000002313c-13.dat	UPX
behavioral2/memory/1840-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/852-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
852	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1840-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001000000002313c-13.dat	upx
behavioral2/memory/1840-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/852-26-0x0000000000500000-0x0000000000510000-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 1840 wrote to memory of 852	1840	2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe	84
PID 1840 wrote to memory of 852	1840	2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe	84
PID 1840 wrote to memory of 852	1840	2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_1dfcb2e620b48d34de4b004c6ed905a0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:852

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\misid.exe

Filesize
94KB

MD5
be34b5a603b8b6cb1e08b63ed1635dc6

SHA1
363b667d50b6c51ab03a79075fb80e5a1ff06686

SHA256
fc27f8741d5052ef9b1375492e20a317e41733425966bc0def2742c9cb1a4d83

SHA512
f333f5c3ffdc90374fd6c09ddf9237d958424dc881fa5f5d2c8aa6008a59d5b1dd05ff1bf6c66ba3655a9e679bcf184e584af07844e06b4a91c7eda92edb445f

Download Submit
memory/852-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/852-24-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/852-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1840-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1840-1-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/1840-2-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/1840-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/1840-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download