dd2699a0fd719911783f9fc04c52b665773ea033eac43ea397f2a83be726dcf4

Analysis

max time kernel
142s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:55

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General

Target

2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe
Size

122KB
MD5

e9f0623e0be171e84d465ed51bd4a6fd
SHA1

133342d2e4c3a817406f73d32cc31d033f625e46
SHA256

dd2699a0fd719911783f9fc04c52b665773ea033eac43ea397f2a83be726dcf4
SHA512

be73f9d18a3029cd984ea30ed4ba5c5e8d7b6c2dcef0d83ee39d348037ba7ba9a53ec7064bb0279fccc1cacb232ecdd3d0e218eea948116166fadc7c8f4c7251
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgpwqWsviy6b:z6a+CdOOtEvwDpjczH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4100-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3616-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4100-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3616-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4100-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3616-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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

Processes:

2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3616 asih.exe

pid	process
3616	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4100-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3616-26-0x0000000000500000-0x0000000000510000-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:

2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe

description	pid	process	target process
PID 4100 wrote to memory of 3616	4100	2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe	asih.exe
PID 4100 wrote to memory of 3616	4100	2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe	asih.exe
PID 4100 wrote to memory of 3616	4100	2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_e9f0623e0be171e84d465ed51bd4a6fd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4100

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3616

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\asih.exe

Filesize
122KB

MD5
11d60c2ce1be9290d89f7338384f1d83

SHA1
0217cfbc7b65d6a47b487b700b1bf98c607f112e

SHA256
47d557c5a005ca67f2b57a74b8eaa9e61d4ee9df5a7761a2cbff30e807d8d3a8

SHA512
da0b828e3372fbcade6259a351090980f2cc91cc0c3ad719ac5431d558436976c2416dc4fe7ef04ac6d3b56cfc500ddb78840d0cc6aea290cf15dffcb54a2a97

Download Submit
memory/3616-19-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/3616-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3616-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4100-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4100-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4100-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4100-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download