56f4ab6f655c4dda717faf957948662dc691f79a580785b8a79c06a17823c470

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 19:18

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General

Target

2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe
Size

40KB
MD5

7533df84bcdd2c472eb1775ceaca1b05
SHA1

b16e727905e82da9bc1ccb4aa40a24bb2d05bb6c
SHA256

56f4ab6f655c4dda717faf957948662dc691f79a580785b8a79c06a17823c470
SHA512

d5cc2c713cfa9dc4d970ed6aeef08fe270ce787fd58ca11cb764d8914102a915132a5f2e5f9d499698760582594985806b065cf45d3142bd82625403e12e5de6
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8Nl:qDdFJy3QMOtEvwDpjjWMl7Tdn83

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1524-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000233d5-13.dat	CryptoLocker_rule2
behavioral2/memory/1524-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1524-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000233d5-13.dat	CryptoLocker_set1
behavioral2/memory/1524-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1524-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000233d5-13.dat	UPX
behavioral2/memory/1524-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4244	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1524-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00080000000233d5-13.dat	upx
behavioral2/memory/1524-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-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 1524 wrote to memory of 4244	1524	2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe	81
PID 1524 wrote to memory of 4244	1524	2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe	81
PID 1524 wrote to memory of 4244	1524	2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_7533df84bcdd2c472eb1775ceaca1b05_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1524
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4244

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
40KB

MD5
818af94d3b947dc64541b384fc28c749

SHA1
4bc81355e9723b181910ed1b3f2fca4b459ded51

SHA256
5295cd5e27911f454a61739b604791a9a9ff02f532703a1e3f96fc857f8d31a6

SHA512
01c7e511a2c0b2243af25ca1cb1a1328e492bad6148a67ecf83e310e1bd024badc5cc6ff885e6cd4baedbce2f83e95424778db592812973443af121b6495861b

Download Submit
memory/1524-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1524-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1524-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1524-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1524-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4244-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4244-25-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4244-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download