b68159b120a3fcb021554c769a9fb788a5aa27a1e4e52b8ae4c534b4bd5294af

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 04:24

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General

Target

2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe
Size

115KB
MD5

0937fc904859910e5ac74c058c84b2cb
SHA1

7d2ee6ccba4aa74b8c29e1b5fe63bd3a29b87f59
SHA256

b68159b120a3fcb021554c769a9fb788a5aa27a1e4e52b8ae4c534b4bd5294af
SHA512

3429067a620b927e059168dd7a744cc10a48c2076a3c2c355ae94c57d7da5e365776a5a5786f095c572ac7edfdea8812e05bb8b82c84e368904f13a05b8029cf
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01F:z6a+CdOOtEvwDpjczn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023221-13.dat	CryptoLocker_rule2
behavioral2/memory/2316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023221-13.dat	CryptoLocker_set1
behavioral2/memory/2316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023221-13.dat	UPX
behavioral2/memory/2316-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2932-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2932	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023221-13.dat	upx
behavioral2/memory/2316-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2932-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2316 wrote to memory of 2932	2316	2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe	84
PID 2316 wrote to memory of 2932	2316	2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe	84
PID 2316 wrote to memory of 2932	2316	2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_0937fc904859910e5ac74c058c84b2cb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2932

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\asih.exe

Filesize
115KB

MD5
0c1bf3c81f6628fa6bc8c7eebba45063

SHA1
22aeed3e52cfbff84d62df431d6f9a5234f7f599

SHA256
697d80b28478f3b6f44653b269989fc80bd9f8dbd8f817fcfec2532d1132585e

SHA512
4e3c5cf5d9644c7e41e4fcf869b4f5a7da53cb805e7a3a21ab0fedf8e880878b43d24e5773d0dd44acc6ac018097e3d2f688ebf8f54dcd5d97dfe5cacebae246

Download Submit
memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2316-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2316-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2316-3-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2316-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2932-20-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2932-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download