4e5c53788623260a80b22911486f6d28f7b07f5ccdd360518af9f1bf03433999

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 18:31

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General

Target

2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe
Size

99KB
MD5

31edead8a865ef514f7bfeac7a51af84
SHA1

864335820ef5cafb20ef46b139e3d300cf11ec36
SHA256

4e5c53788623260a80b22911486f6d28f7b07f5ccdd360518af9f1bf03433999
SHA512

b768e43f6d816bd4e88eaa39f1e6b9e5aacac08aaa5bb596f80c4496b914ec8f039d441a0edb39ef8db7afdbb3c2eea9618f26bd01485ce723e7f31a57bf90c0
SSDEEP

768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2OY3:xj+VGMOtEvwDpjubwQEIiVmkxv/CY3

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_rule2
behavioral2/memory/880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4940-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/880-53-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_set1
behavioral2/memory/880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4940-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/880-53-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000700000001e59e-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/880-18-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4940-17-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/880-53-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress

Checks computer location settings 2 TTPs 2 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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
880	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 4940 wrote to memory of 880	4940	2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe	86
PID 4940 wrote to memory of 880	4940	2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe	86
PID 4940 wrote to memory of 880	4940	2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_31edead8a865ef514f7bfeac7a51af84_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4940
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:880

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
99KB

MD5
df4db8c619877bee44bbb35e58d47910

SHA1
ee6ff104173e184efb5ff9ad47fe9dc67dc8837f

SHA256
621c0fce8c47d1db79fa77d2ff3526aa2c2d7e424af73cf975f22777b82f6884

SHA512
0fac61ac6b8203eb90596d90961e254899adc75168e69e7a794da8d105b90b7e7e1d069135fd5a53e12336c76bf2acf9669072f037c2a6b9bfbc5f1ac1004a87

Download Submit
memory/880-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/880-20-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/880-21-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/880-53-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4940-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4940-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4940-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4940-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4940-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download