fd0463a220bf81e793b41e1af58537d0100afdf3da8da83be9a2ef19605bbf02

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 00:38

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General

Target

2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe
Size

58KB
MD5

432ec69d922afa328f338ba53ef4c164
SHA1

b138002d766536ab7e06df843b0623771f9c2e14
SHA256

fd0463a220bf81e793b41e1af58537d0100afdf3da8da83be9a2ef19605bbf02
SHA512

2f0f1b627a1bc0729873b1bd03b75fe734de16220d77ff843baaed3179dc0349badee3833cf211ba38450115604dc637f024100909c13f6d54035c450c021507
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPj7:H6QFElP6n+gou9cvMOtEvwDpjCpVXq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b94-13.dat	CryptoLocker_rule2
behavioral2/memory/64-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/64-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b94-13.dat	CryptoLocker_set1
behavioral2/memory/64-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/64-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b94-13.dat	UPX
behavioral2/memory/64-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/64-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
64	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b94-13.dat	upx
behavioral2/memory/64-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/64-27-0x0000000000500000-0x0000000000510000-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 1748 wrote to memory of 64	1748	2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe	83
PID 1748 wrote to memory of 64	1748	2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe	83
PID 1748 wrote to memory of 64	1748	2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_432ec69d922afa328f338ba53ef4c164_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:64

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
58KB

MD5
131dedab44125b53cdfb3898bef8a3d7

SHA1
65f9a16bc7ca74a681a49db3ed6e4266b97d2134

SHA256
80668ed569d68cbae6c8a4139c0c8e6c2726e5889a6e24d000113eca1978f109

SHA512
900ff0600fc092d01a1b548db641c63a88ee3dbbbd7ef5f4adb11cfdafd31164bf4b1a0712b458315aa04e7624bf2176878b42f831d5d7ee1030c69950fbc450

Download Submit
memory/64-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/64-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/64-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/64-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1748-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1748-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1748-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download