3c8bb7241bec12f1e28786bb466483c2827e6686e7cd31bd2ff5bfbeb90b8d07

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13-05-2024 12:25

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General

Target

2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe
Size

78KB
MD5

1e9a84c7edc546ca3617c1b1e61a29a4
SHA1

7da09c1c417d1ce26b495da5e95431e2800b525e
SHA256

3c8bb7241bec12f1e28786bb466483c2827e6686e7cd31bd2ff5bfbeb90b8d07
SHA512

d90056b4a754bf8c4d5baeb553fadccf39fa87215477611b4871e0b49f2331ca69f7b74f348ff30c83d26075d0268016217859004f94757099e8eb399d320652
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1H:T6a+rdOOtEvwDpjNtHPc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3328-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/3328-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4312-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3328-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_set1
behavioral2/memory/3328-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4312-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3328-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002328e-13.dat	UPX
behavioral2/memory/3328-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4312-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4312	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3328-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002328e-13.dat	upx
behavioral2/memory/3328-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4312-26-0x0000000000500000-0x0000000000510000-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 3328 wrote to memory of 4312	3328	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	82
PID 3328 wrote to memory of 4312	3328	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	82
PID 3328 wrote to memory of 4312	3328	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3328
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4312

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
78KB

MD5
06e86b89ecee27f20a0b3fe02fc98ce4

SHA1
375da6570ed01539c705a47ed471c29b026d611b

SHA256
d1b8189c69c86f048ca6c3c77dd5a37d81862ba6e9542fb510cb346c2316dede

SHA512
d43c017c90db4a548ec8e722edb83e4223a0a1725c906b6d8d44e339e059d7955a9e9b79cdb425dd3e28e82e5274c0e344dab53d62524e5ef5126440562dff53

Download Submit
memory/3328-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3328-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3328-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3328-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3328-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4312-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4312-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4312-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download