d6d5920b2d38ebc91c333d2187c82bb82d9d75d3aa1b02fb90e0124869ce9930

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 22:28

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General

Target

2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe
Size

95KB
MD5

53bb5ef915746863ef77e3a5274f83dd
SHA1

9ddc23caf2201a9f3d047a104abb6adde82ff15e
SHA256

d6d5920b2d38ebc91c333d2187c82bb82d9d75d3aa1b02fb90e0124869ce9930
SHA512

4e82dcbe8f1fe797e9aba3590e1f920788b894d245c4b35cb061873b9b00e8b12c9917e3cd6163f0ae092fc87457ce52d8774ce8882f0e430cc7f543b6647973
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01Ox:AnBdOOtEvwDpj6zi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1512-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023228-13.dat	CryptoLocker_rule2
behavioral2/memory/1512-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3192-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1512-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023228-13.dat	CryptoLocker_set1
behavioral2/memory/1512-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3192-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1512-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023228-13.dat	UPX
behavioral2/memory/1512-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3192-26-0x0000000000500000-0x000000000050F000-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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation	2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3192	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1512-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023228-13.dat	upx
behavioral2/memory/1512-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3192-26-0x0000000000500000-0x000000000050F000-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 1512 wrote to memory of 3192	1512	2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe	85
PID 1512 wrote to memory of 3192	1512	2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe	85
PID 1512 wrote to memory of 3192	1512	2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_53bb5ef915746863ef77e3a5274f83dd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3192

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
95KB

MD5
3b69309f7f8274ab0d458d6be2f35a78

SHA1
d5eb73f6eaf5106c7b40fe5b3ed1c3e091f3fc58

SHA256
4f9704667f282d2c3b0c2c8dc1a5293de8b50d5ffeb3d7471d85eddb8f7d947c

SHA512
069034e6cde7d03166585f59e583a4eb4b3f71d0220e22507dccd8cc79cd7816c7c32c050855b1dfc4563f68ce69e1d137accaa9fc8f09a16a2e6c34d810cf2e

Download Submit
memory/1512-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1512-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1512-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1512-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1512-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3192-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/3192-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/3192-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download