0d7c471761c42b9c8816f190bb29eb98ee5581012d9d3f88983ed0edfe6c2ac0

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23/02/2024, 07:56

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General

Target

2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe
Size

89KB
MD5

efa503c11bd217108a8b8cc6f0810d70
SHA1

5a94ec9cbebce0eb95a1fa51863f3acba8199c3d
SHA256

0d7c471761c42b9c8816f190bb29eb98ee5581012d9d3f88983ed0edfe6c2ac0
SHA512

47b7c34e08ea9ff9a0762ed35b99edc419fcbc5be4b4e9b962601d6a7f65301dc79257ce8612d6a9389fede9d34a8d045fa97b363ad197f23979cd74363b61e2
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdxw:AnBdOOtEvwDpj6zg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3204-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002311b-13.dat	CryptoLocker_rule2
behavioral2/memory/3204-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4260-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3204-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002311b-13.dat	CryptoLocker_set1
behavioral2/memory/3204-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4260-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3204-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002311b-13.dat	UPX
behavioral2/memory/3204-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4260-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4260	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3204-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002311b-13.dat	upx
behavioral2/memory/3204-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4260-26-0x0000000000500000-0x000000000050F000-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 3204 wrote to memory of 4260	3204	2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe	86
PID 3204 wrote to memory of 4260	3204	2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe	86
PID 3204 wrote to memory of 4260	3204	2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_efa503c11bd217108a8b8cc6f0810d70_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4260

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
89KB

MD5
307a82878dda3c87ede3e35b923384ff

SHA1
cfef6cf757d0eeed57ea566982c3d15bc7f5aaf5

SHA256
71008ee0cba872a6de1f9c691ba22e5bc106857b99ce4f1a17dcff6ff0c93d79

SHA512
4123472705824f4fbc332a35bdf839d3095e13da12e77eb665ec14ef54eb4d5238a96629740b26025a75f7c33624736b97888d08ef1914834497c1f20508f600

Download Submit
memory/3204-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3204-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3204-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3204-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3204-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4260-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4260-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download