8eb8004db95e8b6682b4610ecd290406b8801c91bdf6ddeadf9d245760bf74e3

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:24

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General

Target

2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe
Size

79KB
MD5

1dcf04d80017ebe6244dbe2b62911a4e
SHA1

ce4a10a35895e7747ea3cad1392426948a1c5573
SHA256

8eb8004db95e8b6682b4610ecd290406b8801c91bdf6ddeadf9d245760bf74e3
SHA512

b2b8e54c7be27263729eaae84d5bc352aff5ef048c93e360934912a846f39846dc7367f0614245305cfd16b57998196178f5ba29f11881db69e6f561a54a3432
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB14F:T6a+rdOOtEvwDpjNtHP7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3472-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3472-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3472-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3472-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3472-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3472-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2772-26-0x0000000000500000-0x0000000000510000-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:

2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2772 asih.exe

pid	process
2772	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3472-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3472-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2772-26-0x0000000000500000-0x0000000000510000-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:

2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe

description	pid	process	target process
PID 3472 wrote to memory of 2772	3472	2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe	asih.exe
PID 3472 wrote to memory of 2772	3472	2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe	asih.exe
PID 3472 wrote to memory of 2772	3472	2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_1dcf04d80017ebe6244dbe2b62911a4e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3472

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2772

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
79KB

MD5
e223a105c066d32d6aff94b2aca0a279

SHA1
852a034c06fcab4f6b265a408dd3dd4a7ab70894

SHA256
ede4b8e1140cdfee29efc6cc36bc2ca773a7e288b80ce1b55fd587733febbdf1

SHA512
64b87c8943c8697c5ca77148eef72672b512c8997da7a6ee30045bce213f3db1d5f2136097cbc53f86447a01d733d1581c11904570654159c22fd44fe7060879

Download Submit
memory/2772-25-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2772-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3472-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3472-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3472-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3472-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3472-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download