c9a8ef4a0023d076d345be4d20d8e8320189287d99467f3d845cf6c1d6bdfb84

Analysis

max time kernel
141s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20-02-2024 06:36

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General

Target

2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe
Size

39KB
MD5

5bffbeb2f98333d655a3e96d8812451c
SHA1

58d17c0c105cd846d2aab753ce869a05118218c2
SHA256

c9a8ef4a0023d076d345be4d20d8e8320189287d99467f3d845cf6c1d6bdfb84
SHA512

3df82b4dc8bd55270094d376aedc89dbc00b7b6ebd3a1c6424ba7974e84e56f44752fff76694c63313d92413ca9e8555f772c0d92bb950934f608fc831e21fa2
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkL/5:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/564-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002313a-13.dat	CryptoLocker_rule2
behavioral2/memory/564-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/564-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002313a-13.dat	CryptoLocker_set1
behavioral2/memory/564-17-0x0000000000500000-0x000000000050B000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3000	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 564 wrote to memory of 3000	564	2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe	84
PID 564 wrote to memory of 3000	564	2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe	84
PID 564 wrote to memory of 3000	564	2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_5bffbeb2f98333d655a3e96d8812451c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:564
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3000

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
39KB

MD5
c75611dcd8941394ab99bb69e6fd3b13

SHA1
17f464ff0e387740bf0040eeb1bdaa9ec562ab1d

SHA256
5672faae1e7efb0bd294f53dd6879a5d0ed1407ff6cd8796e7eaa9650c0a3694

SHA512
2dfca3e4b33c7a2293b244bac60b5e16f4452f24fbd5714c4d2bf84ac4c74da6e03cc4abfe08c4ac9a8c46f110998699fec8ee6aa3b4246cce5416aa6b1718ac

Download Submit
memory/564-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/564-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/564-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/564-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/564-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3000-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3000-20-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download