de2785df4b535d61b8ad23bc1b46c235619ecfc7880f31963d6aa49877381de6

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 23:33

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General

Target

2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe
Size

39KB
MD5

7cb318f9d4b86cf44be7ecadf528d3ea
SHA1

6e13ded0b67e8d215b85a9405bf2e33598e83301
SHA256

de2785df4b535d61b8ad23bc1b46c235619ecfc7880f31963d6aa49877381de6
SHA512

68aeb140434289a6f85792cab40dd37e79a9db8422c6dcc51fb37604ecd5cb6fac142a18055fd0b69e926bd549ca80603b33f8c8c0c7492751fb89baeb147bef
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY7f:qDdFJy3QMOtEvwDpjjWMl7Tsf

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002340f-13.dat	CryptoLocker_rule2
behavioral2/memory/3976-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/460-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002340f-13.dat	CryptoLocker_set1
behavioral2/memory/3976-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/460-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b00000002340f-13.dat	UPX
behavioral2/memory/3976-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/460-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
460	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b00000002340f-13.dat	upx
behavioral2/memory/3976-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/460-27-0x0000000000500000-0x0000000000510000-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 3976 wrote to memory of 460	3976	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	81
PID 3976 wrote to memory of 460	3976	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	81
PID 3976 wrote to memory of 460	3976	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:460

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
39KB

MD5
c849ab0cb4e8e10ff689fce6d2d86399

SHA1
ae2bcb8afb65dfb3deff220b9384192d7aa1f6b0

SHA256
648b4a520ecc9e4eab8b18eae81c56ee0415e1dcbfa85b00da4a40a1b66c6b84

SHA512
939ef57850a1fc8e0e5926cc48309f19a27302ba747adcd744aa8d8d61196781c1bcd851436bce5d1bbf7f084ee880fe34ee8c692c8e52d92e74dda989a55518

Download Submit
memory/460-20-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/460-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/460-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3976-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3976-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3976-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3976-9-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3976-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download