81048f3debdf218a9ed56bc551831deada130b8b90ff090007927a9e410a1bbb

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 04:27

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General

Target

2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe
Size

55KB
MD5

4424078f1e0e8e88db235c9cf283ef74
SHA1

a9b43024c8096b54e6c828fab746dfc20a6dde6d
SHA256

81048f3debdf218a9ed56bc551831deada130b8b90ff090007927a9e410a1bbb
SHA512

b9969682bca98a5264075a30104e7e7f1f46746a111bfa98b3b13962f9a458a51727cf9453acba9782518105a794cd9a84bf4f647bca53515fc378e617a82e36
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlQ:bP9g/xtCS3Dxx0b

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2
behavioral2/memory/908-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\gewos.exe	UPX
behavioral2/memory/908-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

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

Processes:

2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

908 gewos.exe

pid	process
908	gewos.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\gewos.exe	upx
behavioral2/memory/908-19-0x0000000000400000-0x000000000040E000-memory.dmp	upx

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

Processes:

2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe

description	pid	process	target process
PID 3748 wrote to memory of 908	3748	2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe	gewos.exe
PID 3748 wrote to memory of 908	3748	2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe	gewos.exe
PID 3748 wrote to memory of 908	3748	2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_4424078f1e0e8e88db235c9cf283ef74_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3748
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:908

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\gewos.exe

Filesize
56KB

MD5
fe467fd7979eb883a27ac8340a0a60de

SHA1
50176b369e513e30e4499b57f3fe745f87b947f7

SHA256
11ba6a37b4eccf5dfc3c0dae745077540b7ee8c1e5b47d5373fc45a34086e81b

SHA512
ac2ead0f4aa9a63c63c85bef43926fd40aa1a3aef69e6d87126898db52b806dcc9f0dc6f3047f78b35732d8f9b857cbf64980e857352953a27074cd73d379d93

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
aa29860df1edf78e1c49ba7178a58d8c

SHA1
84ce249ad9b46e8de306d84cfcc60c2018fd4987

SHA256
c75d77d052db4b582cf8e17a3e856b679714dc94384bd9840970fa5e909567c0

SHA512
fcd49af5f4f61cf57ccca7200dc45a18816b200438c1206126b440f50e38d6b99f2d7542f889c4a2df4b65154709985c9322605fd7682664a4f7c92f4cb31ba1

Download Submit
memory/908-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/908-27-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/3748-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3748-1-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3748-2-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3748-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download