198fd94f301379d75088e9edd13f5e677186bf9f689d5bb8bc35105c761c1998

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 01:27

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General

Target

2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe
Size

38KB
MD5

483881f3b637c8cf86140326ce584319
SHA1

dce386a450700ef0d4d220de3cba1e34b37d0d40
SHA256

198fd94f301379d75088e9edd13f5e677186bf9f689d5bb8bc35105c761c1998
SHA512

d770f15a8289a65c1af9bfb4b6b16e16b3ce406bb035841db9c1e018c9bd24e4666c7deb2786528278802e3409c1068ea4a40919db577ed88507c24d467a5991
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaG:qDdFJy3QMOtEvwDpjjWMl7TdG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023277-13.dat	CryptoLocker_rule2
behavioral2/memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1468-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023277-13.dat	CryptoLocker_set1
behavioral2/memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1468-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023277-13.dat	UPX
behavioral2/memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1468-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1468	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023277-13.dat	upx
behavioral2/memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1468-26-0x0000000000500000-0x0000000000510000-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 3336 wrote to memory of 1468	3336	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	86
PID 3336 wrote to memory of 1468	3336	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	86
PID 3336 wrote to memory of 1468	3336	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1468

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
38KB

MD5
92c44f6b6c6eeaf0171dc3d716422858

SHA1
d8070ec370dacbdbb70d83261a2f8bf4bf92de61

SHA256
d85b42e09c1e2471a24a08cbd5ee1de9db8332e34243166a07258f27ad6fbcdf

SHA512
53203d035c534dcb5c4e4a904207b5f586f3434b7d9f2af6631e4ac8e74fa598706353a3676c6b02da4d991772c6bc0a6f6bb84342926da0c449ec4962488e9b

Download Submit
memory/1468-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1468-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1468-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3336-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3336-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3336-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download