439dadd482c21d8a02d55a21e4c89eb20fe67238e4a2632403be102fb41d9c39

Analysis

max time kernel
108s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 01:41

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General

Target

2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe
Size

40KB
MD5

1d7523dc671ad88d825fd056b83ef662
SHA1

21f1855a6f8911d4640b2e49d52c221cf1fc2404
SHA256

439dadd482c21d8a02d55a21e4c89eb20fe67238e4a2632403be102fb41d9c39
SHA512

1819de78e6a66ac008fb4b1c7b07d527aef18b081c8dcb150c89edfcac4c67dc654a08e10548c22cf744ae2bd78a88f7a5da72e3ee983da88bdb7fd3d757bc12
SSDEEP

768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnIW:m5nkFNMOtEvwDpjG8hgp3

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1900-0-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023173-13.dat	CryptoLocker_rule2
behavioral2/memory/1900-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4348-18-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4348-55-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1900-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4348-18-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4348-55-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/1900-0-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000b000000023173-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1900-17-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4348-18-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4348-55-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress

Checks computer location settings 2 TTPs 2 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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
4348	misid.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 1900 wrote to memory of 4348	1900	2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe	34
PID 1900 wrote to memory of 4348	1900	2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe	34
PID 1900 wrote to memory of 4348	1900	2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe	34

C:\Users\Admin\AppData\Local\Temp\2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_1d7523dc671ad88d825fd056b83ef662_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1900
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4348

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
40KB

MD5
55de49051befb96de69f025f31f5b4ef

SHA1
c3053208935a289b9b099ddebe1300a779f03334

SHA256
d3150a2757ecd44e37fee473a6afc51141b68d8da775647be8716290ab7c6bb3

SHA512
ebbe740ac1d7be63d4c8348e1f8b904d20a1d940091b7f51575c5c6a17bca077a36963b81526d475cb2344c7f4f8fe4510c8cd9de7600ec095ec56513b50b6dc

Download Submit
memory/1900-0-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/1900-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1900-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1900-3-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/1900-17-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4348-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4348-18-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4348-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4348-55-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download