099f2c9f341e07bf055d481973759aa2b1f3a86a71ee3817ce046cd11712c894

Analysis

max time kernel
94s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 20:59

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General

Target

2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe
Size

36KB
MD5

d1fbaf2b042a319863342fee1d9e854e
SHA1

39182569bb5c4310670884f0e5bdcb9f23815ec7
SHA256

099f2c9f341e07bf055d481973759aa2b1f3a86a71ee3817ce046cd11712c894
SHA512

ce3ec0b6bf7c4e81008795f1b302bbe8a0671f1f77061f9f3d31bf0e079c08e75f3e9aec06aaeba68c054fe2e5adb8cceb32512c4161df414b519cd53f7aa357
SSDEEP

768:b7W5A8WtijKeOcfXor3BPOz5CFBmNuFgM:b7W5AWjTGx02

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral2/files/0x000300000001e97c-13.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
4224	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral2/files/0x000300000001e97c-13.dat	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

description	pid	Process	procid_target
PID 4760 wrote to memory of 4224	4760	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	85
PID 4760 wrote to memory of 4224	4760	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	85
PID 4760 wrote to memory of 4224	4760	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4760
- 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:4224

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
9aafc5641440d9634bf82219f6ef54f7

SHA1
aae4ff9359893eb830969498cfebad6e095d91c6

SHA256
19cb236d737f162812102bef110675b66456663b3e8e3a9561c85f64fd291281

SHA512
2ce7c5d346ce40ac66c951c2f81a5d3da52be3e8592f55267b958c1f7af65e390338ea9a1c75071217fd6862d34029472d348a746d8abce51830f9f3456922a3

Download Submit
memory/4760-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/4760-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4760-2-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4760-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download