a4cae695c39b7d99ae6d2ed97b854a3f33449d60c9755449990a4443704c8d7f

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 10:24

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General

Target

2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe
Size

40KB
MD5

1f85c04217edd9533988b97eaac95e48
SHA1

757e5fe292aad93b47d79d35c8e6cf0a9a872581
SHA256

a4cae695c39b7d99ae6d2ed97b854a3f33449d60c9755449990a4443704c8d7f
SHA512

3462418798769dbbce68629aee201e556213102934079f13605ff97957e917222cf1f7fcac0dbec6602bc242e8dc80db757eb3dee5e0f09d8732cfb3285f561a
SSDEEP

768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/CtVw:6j+1NMOtEvwDpjrR2Vw

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/680-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023222-13.dat	CryptoLocker_rule2
behavioral2/memory/680-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2472-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/680-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023222-13.dat	CryptoLocker_set1
behavioral2/memory/680-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2472-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/680-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023222-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/680-17-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2472-25-0x0000000000500000-0x000000000050F000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2472	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 680 wrote to memory of 2472	680	2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe	84
PID 680 wrote to memory of 2472	680	2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe	84
PID 680 wrote to memory of 2472	680	2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_1f85c04217edd9533988b97eaac95e48_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:680
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2472

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
40KB

MD5
0beecfeab4e7b26bece558c7af61f36d

SHA1
91b3e4b5583075023d1ad02f9335c1ba9a6287d1

SHA256
b4d35604c69bbf7663d8fba849d7a6be2f6b24976948444c7c73244630bdd558

SHA512
563f9fd39ae9c7f0f4cca86a03c64f74dfb8ec08f1ca4a958efd5eb07b62c3874af52695ce70350a6f78ea587a71b10c3304299910865ce6cf93615e5e0a9fc5

Download Submit
memory/680-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/680-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/680-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/680-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/680-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2472-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download