294ce57d4debcf1e81b99ad8ebe3d4b943960efe535b08c2910dda751b704d9a

Analysis

max time kernel
135s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 18:03

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General

Target

2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe
Size

36KB
MD5

4605fd0fbf5372fbdad8b5aacb641bf2
SHA1

dbe083fdc951dc3258ed177e45caab43904d7917
SHA256

294ce57d4debcf1e81b99ad8ebe3d4b943960efe535b08c2910dda751b704d9a
SHA512

53a21c5e27e0f4fdce9fa9dd3ad7453e23f933ee358df938a1e50b34e4761ac18009c535fb7fc794ebc77a8922138d69d2216d40c7e7f59a984dc1d674029f12
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4l8tFFxE2B0qvoLUZ61VCV:btB9g/WItCSsAGjX7r3BTmUQ1V8

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2

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:

gewos.exe2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

1636 gewos.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1636	gewos.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe

description	pid	process	target process
PID 3008 wrote to memory of 1636	3008	2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe	gewos.exe
PID 3008 wrote to memory of 1636	3008	2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe	gewos.exe
PID 3008 wrote to memory of 1636	3008	2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_4605fd0fbf5372fbdad8b5aacb641bf2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3008

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:1636

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
36KB

MD5
b64d5f33b1a013c7ca5400ab1829357e

SHA1
644b64f8a783c5677c3b2cd1af51941e1337fbd1

SHA256
45e01330df8e08c0ce26fd789050aa434853961997f477efc99cbcd32ca7be0b

SHA512
f24f672346f67bbd8e3eb3970ee5f3d04f4c91e5f8d68a272e350ce1cfc4e9677eb6ecb5c043090e573441cb7a27f4828c2c646a64c0a3b07d40c7547accf172

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe
Filesize
185B

MD5
d282a3b311547a834b9e746378f56132

SHA1
8610b0f2a0c71cfe461a902ef136e8c1a9aae6fb

SHA256
4d2da39b0cca975066d475141a37076ab0043f7bd8a3484e2369e51a87a7de9b

SHA512
da98e7a900721ef20d2770989e19555ed032b60c870d770888807cf1e24faf455aec476918165636976f4533e9548c5c1cb1560ddf223282556d1469a5bccc00

Download Submit
memory/1636-25-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/3008-0-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/3008-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3008-8-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download