452425b38ed09945a6746bd8cfba93aa94c3eeb9762bb8696feb5d1ca4f5eaac

Analysis

max time kernel
148s
max time network
152s
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, 02:50

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General

Target

2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe
Size

97KB
MD5

ed5f52560c52e4593a49c168b6c73016
SHA1

a7bf8b34da08404104351f4f21c85c44956153c9
SHA256

452425b38ed09945a6746bd8cfba93aa94c3eeb9762bb8696feb5d1ca4f5eaac
SHA512

877cccb19a0d7cdc26bf2d4f0420d101215dda86c69a581701b81a49c919b271d5247413f9a8cea8a660ccb91f2fbe5589ff53fc6c60956f65296b8a8e369a84
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKin:z6a+CdOOtEvwDpjcj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002304b-13.dat	CryptoLocker_rule2
behavioral2/memory/316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002304b-13.dat	CryptoLocker_set1
behavioral2/memory/316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/316-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002304b-13.dat	UPX
behavioral2/memory/316-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2520-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2520	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/316-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002304b-13.dat	upx
behavioral2/memory/316-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2520-26-0x0000000000500000-0x0000000000510000-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 316 wrote to memory of 2520	316	2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe	85
PID 316 wrote to memory of 2520	316	2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe	85
PID 316 wrote to memory of 2520	316	2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_ed5f52560c52e4593a49c168b6c73016_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:316
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2520

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
97KB

MD5
4046943d6601f71b049c97526d7feb18

SHA1
c8f80e2b8ca222b63de11038e8a7ad71f99b995f

SHA256
2f56382d307a64cc9f6f7c4f146b98334720b9938f9b5f964b6ee73ce4bacca6

SHA512
85b22b7095729799d7eae9a8551045a93d74ccff0dfff5ceba82089cf9787ed9e5177a6ddd4ef75413b800c5e33bc4f0f3c94e1e697b89f24784fac4116b92bc

Download Submit
memory/316-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/316-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/316-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/316-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/316-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2520-21-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2520-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download