72e37a80e32497a0cc1021b2ca975da57face09e6a6e19838f23556ff10d49e0

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 08:27

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General

Target

2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe
Size

46KB
MD5

29ebc7c3763378f08a62e0a563755ea8
SHA1

226091015914244afdb429aa6f93fd9049adc129
SHA256

72e37a80e32497a0cc1021b2ca975da57face09e6a6e19838f23556ff10d49e0
SHA512

9e4dcc13466fa419416d9b99c737f2637b4e8e8ddbebc091ca4185f4636f18cd703fa5d375d2c456e656b49940ca32e3cc259dfff85ad13530ccd1bcf558e772
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLT:qmbhXDmjr5MOtEvwDpj5cDtKkQZQZ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023431-13.dat	CryptoLocker_rule2
behavioral2/memory/4964-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4592-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4964-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4964-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4592-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4964-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023431-13.dat	UPX
behavioral2/memory/4964-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4592-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4964-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4964	asih.exe

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 4592 wrote to memory of 4964	4592	2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe	83
PID 4592 wrote to memory of 4964	4592	2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe	83
PID 4592 wrote to memory of 4964	4592	2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_29ebc7c3763378f08a62e0a563755ea8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4592
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4964

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
46KB

MD5
346102f4958e9ef6a7fecfeefe6a3da5

SHA1
c18e05b5956c86e27b0f48ef77979b1fc888907e

SHA256
73c320ae926bc45da48bf35605e1f2cd2b6f656e640ccedb50bcba9c2f9a3e33

SHA512
c9a44f0901de0eb0a69a0d059583ff1958f30156cab5fd4d1a778c3d8c2659575d99f93d629482d2dbbf1c236c46916750bb5313007ee73d866867b6bd05517d

Download Submit
memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4592-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4592-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4592-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4592-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4964-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4964-21-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4964-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4964-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download