25b7eca1fceba3717eabba6411bc574c0b92cde48d925a6326577456d8681954

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 16:31

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General

Target

2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe
Size

85KB
MD5

53ec1f5b0c3b4b72b3d4094074d63b6a
SHA1

0edbfa9f4553e6668d674d743d18c0ee1bd42af0
SHA256

25b7eca1fceba3717eabba6411bc574c0b92cde48d925a6326577456d8681954
SHA512

1eb9acc9bf56ef4e1a2b22a0acb729110d526e4b50b318dc7b2bcea5001a546746ecb2bac8d2885d37f8477ec27d94c13cda256a9e0637e0274840643aa3a149
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgBW:AnBdOOtEvwDpj6zY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_rule2
behavioral2/memory/3572-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1196-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_set1
behavioral2/memory/3572-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1196-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023039-13.dat	UPX
behavioral2/memory/3572-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1196-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1196	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023039-13.dat	upx
behavioral2/memory/3572-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1196-26-0x0000000000500000-0x000000000050F000-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 3572 wrote to memory of 1196	3572	2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe	85
PID 3572 wrote to memory of 1196	3572	2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe	85
PID 3572 wrote to memory of 1196	3572	2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_53ec1f5b0c3b4b72b3d4094074d63b6a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3572
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1196

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
86KB

MD5
9d5d98bf8b88f0fb81130a797edfb723

SHA1
c43523726bd6371567e02dec2b19a9405c4c17fa

SHA256
95f76370885ac303763789ca69dce78241e3ad678b224a9d4b360b4a58db53ef

SHA512
9df165e7a2388ca7e0c752b3be4b9efa79a9bf71639e5036a9a9e26471ea403e95a37d9a6ee08d5ed47f36019157947b1a1e708128608583d80744b92e6cd884

Download Submit
memory/1196-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1196-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1196-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3572-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3572-1-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/3572-2-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/3572-3-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/3572-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download