fddc922e903369fe3c30a65ae98d04d28479d2461b3cb1fc1f358821ab95b3bc

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 08:24

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General

Target

2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe
Size

49KB
MD5

23e7f0edf49aa7dc8e068e1616607def
SHA1

e040356ce797f9f0077af3764a966380d30c249f
SHA256

fddc922e903369fe3c30a65ae98d04d28479d2461b3cb1fc1f358821ab95b3bc
SHA512

9fbc31dea369af969df735db38e83a41c2af5f6a684aa70ad02654bda38e5f5a9b4606cf28a8efbd3e70bc3e303658a0e4a027e7c1597210609f3d918c3420ef
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MocB:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_rule2
behavioral2/memory/740-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2624-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2624-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/740-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2624-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2624-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97c-13.dat	UPX
behavioral2/memory/740-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2624-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2624-27-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2624	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 740 wrote to memory of 2624	740	2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe	85
PID 740 wrote to memory of 2624	740	2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe	85
PID 740 wrote to memory of 2624	740	2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_23e7f0edf49aa7dc8e068e1616607def_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2624

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
49KB

MD5
6ee93b7e682afcdc65c95b5477a5f369

SHA1
88da839911ae0da277b3bdf441b1d0b25fe8c524

SHA256
bf32f06b496fc34e149e6a6b521d9d538e6cdb0e9b94463faa5365f8369a348f

SHA512
65f3235d6330f9cc0f6854989da71c6ed2ab012c0b346a77af08c36f45fc03392a8bbf1a1c2fa833139bf3d1f04d6d7c2106133efacb9dabd96d6c388e29a34f

Download Submit
memory/740-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/740-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/740-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/740-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/740-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2624-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2624-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2624-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2624-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download