278c1dffc0b7a869f1127b39d8d4100f7ecb0b82763cc85b0903fb2ab891f5e0

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
15-03-2024 19:36

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General

Target

2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe
Size

102KB
MD5

5a654328d75ee51c07a1b3b6353b2a84
SHA1

a96d0561ff14ad1394c6c27226ad665dff8e4f18
SHA256

278c1dffc0b7a869f1127b39d8d4100f7ecb0b82763cc85b0903fb2ab891f5e0
SHA512

b923e23a34e914e6f697f5c6dfb6c62d7ac7b84183229e26eb6c00f1f2245f2c050ab9ad64b8689966b5a49baee34ca3203501dedbd1f9d03b91d83e8808f9de
SSDEEP

768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2yOg:xj+VGMOtEvwDpjubwQEIiVmkxv/C

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000f000000023124-13.dat	CryptoLocker_rule2
behavioral2/memory/4900-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3748-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3748-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000f000000023124-13.dat	CryptoLocker_set1
behavioral2/memory/4900-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3748-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3748-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000f000000023124-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4900-17-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3748-18-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3748-27-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress

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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3748	misid.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 4900 wrote to memory of 3748	4900	2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe	85
PID 4900 wrote to memory of 3748	4900	2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe	85
PID 4900 wrote to memory of 3748	4900	2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_5a654328d75ee51c07a1b3b6353b2a84_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3748

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\misid.exe

Filesize
102KB

MD5
1e9a4769fffa2e883269f25de67989c2

SHA1
750c1cae080142143aa3b05c122cf436a156e17c

SHA256
932e6579a7c2564dda04e1ca94f3de27fc558a3d3101202a4d58c7d9ec1db0a0

SHA512
d33c8b93d48f3f497e98dcfbfcefddbf042e6f7c6443f45d943aeae53ef1189b21817e02f6e6d2c05c5e1655d926e66a5371c851a95c25b6d076109a6f7a4c66

Download Submit
memory/3748-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3748-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3748-22-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/3748-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4900-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4900-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4900-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4900-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download