c2ffaadfa7997ec711a5b80e2feb9190c3cfac719c34a7fa85ae63cc0e9e6bf8

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
26-01-2024 11:27

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General

Target

2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe
Size

50KB
MD5

3f3c787cdfe8fd58fb57df04e49fc72d
SHA1

6080aad6bfbd8bf8599a9713a1c11bf32f6199d0
SHA256

c2ffaadfa7997ec711a5b80e2feb9190c3cfac719c34a7fa85ae63cc0e9e6bf8
SHA512

39fbf41d3a0a8f7b089bd79670432a292bc7872bd5f6bd859e2352079a84748f19ecdabfbfe4f56218098b310ae3214d14b590dc0ae3ce4c56edc86287cddde6
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKIR8:79mqyNhQMOtEvwDpjBxe8TpXR8

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4684-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002322f-13.dat	CryptoLocker_rule2
behavioral2/memory/4684-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4684-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002322f-13.dat	CryptoLocker_set1
behavioral2/memory/4684-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
368	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 4684 wrote to memory of 368	4684	2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe	86
PID 4684 wrote to memory of 368	4684	2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe	86
PID 4684 wrote to memory of 368	4684	2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_3f3c787cdfe8fd58fb57df04e49fc72d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4684
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:368

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
50KB

MD5
debe441529b58beb79fea525a4f40de7

SHA1
c55d590be6a46e5a54f8efdd4896b0fed62ba34e

SHA256
111801aece7f8c9a0e336cb7fc24f6f0234f3d69826e96099254b4e9f888341c

SHA512
6d18a2a6b3aaa15325bde8ec686697cdf047cfa4e170aa17b5cae4f863d023b13a2db5966837fde1816eb04caafdc71b5590c80ea8b1ba2b696379c4aa13eb76

Download Submit
memory/368-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/368-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4684-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4684-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4684-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4684-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4684-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download