18609eeb740838d024e466adcfd52eebce4858a6eee8cedfba99db217da9000e

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 20:06

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General

Target

2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe
Size

39KB
MD5

e695b442b47f0d1abf359fae0ec3abeb
SHA1

63f0e0e11824d723bb460d55b607eaf5f5f9a8ce
SHA256

18609eeb740838d024e466adcfd52eebce4858a6eee8cedfba99db217da9000e
SHA512

ad9e71071e42b746f64243f643075b203638d2089eb24a508410443c2258cc76b87685e64701cd3cc99e0f9b7c5c6bdc45fa736f54b965820c10e789f395f445
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9q:qDdFJy3QMOtEvwDpjjWMl7TR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2868-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3636-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2868-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3636-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2868-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3636-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3636 asih.exe

pid	process
3636	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2868-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3636-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe

description	pid	process	target process
PID 2868 wrote to memory of 3636	2868	2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe	asih.exe
PID 2868 wrote to memory of 3636	2868	2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe	asih.exe
PID 2868 wrote to memory of 3636	2868	2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e695b442b47f0d1abf359fae0ec3abeb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3636

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
39KB

MD5
2252fa5623a019bf06d7f597bc4a779c

SHA1
01daf9b18df21adfe045ed242f5b6f0d4b128dbc

SHA256
dd3945c340fff2950a4e2b52f13fd352375f553f8e322bc3e3f2d00207b1fea1

SHA512
dd035b10cb30e69c684fa95f1352da48becca494cc3be92b521c3c7432895bb93f9a9f995f06b86a00969af66656dd3635146ca91ea388ae1e4287591d8918b4

Download Submit
memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2868-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2868-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2868-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2868-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3636-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3636-26-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3636-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download