da7b0113d386a467bfbe2f6c32a29de9b6ed091d0c505d567a2c3634d45f1a35

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 15:50

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General

Target

2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe
Size

38KB
MD5

58b6b7815e797321bafd69e1a0628462
SHA1

7963c0bba072daa72b5e9c0a116d216957df67b3
SHA256

da7b0113d386a467bfbe2f6c32a29de9b6ed091d0c505d567a2c3634d45f1a35
SHA512

dfe6a0599a597e84129e9a0e525bbd1c5810193e593ae594d783509752a2f8b4709beaed68da50424e190a57b1b9cb584ff8b8b3f3f2915668e22ba7f7aaef62
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/s:qDdFJy3QMOtEvwDpjjWMl7TR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5080-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5080-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5080-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5080-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002327d-13.dat	UPX
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5080-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5080-27-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5080	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002327d-13.dat	upx
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5080-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5080-27-0x0000000000500000-0x0000000000510000-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 3000 wrote to memory of 5080	3000	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	82
PID 3000 wrote to memory of 5080	3000	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	82
PID 3000 wrote to memory of 5080	3000	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5080

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
0725b755ea070ef918e61c46341dc5a5

SHA1
e382fc45ddd5329d037c9ce94a0bb1c5b6ba51af

SHA256
427fe42ee4bc4b59d7040fd096f7fd5cab6e71f5f34015253d82a11f011a07d0

SHA512
bfc7bfb14e3d62868a52667a05e8c4486fd79e5393b1a2c62ae4edc24c0926584081953c305c75d7bda16592779b20187434800e54fe4311d6b41f62d12d5a01

Download Submit
memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3000-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3000-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3000-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5080-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5080-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/5080-26-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/5080-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download