24b74bf9c7703d884e6fdb43658f091154303fac63936548f2592224f9ea792d

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2024, 00:31

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General

Target

2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe
Size

70KB
MD5

23cfbdbc93d25294acfde731332df5f8
SHA1

7ffe06b28c4b40262cfeac9fb27dfb5f06a3dbea
SHA256

24b74bf9c7703d884e6fdb43658f091154303fac63936548f2592224f9ea792d
SHA512

5cf00e3d138f4215aab911dd9ba3f0e83530cb34e9c89bf06c77983c5e6c696e36f12755d8581112eff99b5747b6c8fbea4f2b768f113486387139e6076125aa
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUR:DW60sllyWOtEvwDpjwF85f

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e96f-13.dat	CryptoLocker_rule2
behavioral2/memory/2336-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e96f-13.dat	CryptoLocker_set1
behavioral2/memory/2336-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4684	asih.exe

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 2336 wrote to memory of 4684	2336	2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe	88
PID 2336 wrote to memory of 4684	2336	2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe	88
PID 2336 wrote to memory of 4684	2336	2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_23cfbdbc93d25294acfde731332df5f8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4684

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
71KB

MD5
9b54eb8e3ec0de64d73940907cc2f5f3

SHA1
42dac5d6498ae1aa6d4075b9e189b2f85fb6f928

SHA256
7a4075306b042a6dd588d39c74f2411679a38adec4d8a462fb6d315630d063c3

SHA512
81685374ea28e052bb17e1c35685a69d28d425802b995642b13be8bccb69bbba4e8469d9e79ba37a65597d3f7cddacb9d17a4badfc022fc712d03e93b6a3d110

Download Submit
memory/2336-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2336-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2336-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2336-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2336-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4684-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4684-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download