a17e4462056a8bccf1c1b9dbb16a7b6d5697b1981c9fc121d11f6deef8bbdcfd

Analysis

max time kernel
144s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 03:22

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General

Target

2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe
Size

79KB
MD5

086eaae3a072efca24a2bf3358b04c4a
SHA1

def71b0021208456b7c27c7e47df93a6fdd58eac
SHA256

a17e4462056a8bccf1c1b9dbb16a7b6d5697b1981c9fc121d11f6deef8bbdcfd
SHA512

fbf4f418ef9c63c72b496b36b908c9e518054313d7008e8bfc780fbc1a58d5a402b28107627cb5855a8577d4479ba1ba412ddf449404dbc3c754a8907fc84b5c
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRU:T6a+rdOOtEvwDpjNtR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000016fa5-13.dat	CryptoLocker_rule2
behavioral2/memory/1380-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4800-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a000000016fa5-13.dat	CryptoLocker_set1
behavioral2/memory/1380-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4800-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a000000016fa5-13.dat	UPX
behavioral2/memory/1380-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4800-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a000000016fa5-13.dat	upx
behavioral2/memory/1380-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4800-26-0x0000000000500000-0x0000000000510000-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 1380 wrote to memory of 4800	1380	2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe	91
PID 1380 wrote to memory of 4800	1380	2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe	91
PID 1380 wrote to memory of 4800	1380	2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_086eaae3a072efca24a2bf3358b04c4a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4800

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4092 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:936

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
79KB

MD5
c74a46f02d58c388fb847c7b78044d67

SHA1
185419a275bbef3df80340479012eaeb71c01b27

SHA256
a76ceca1de6f6dade0b22f4cffeefe0c05a4c80152e0e8bd744933405ca0aed5

SHA512
60faf87b94b70fecc15ce7ab3c8cebfc5b9d26a3a5f80019b35fe8ffe9639769135c48d6ef8d2fc170b25bad3ab6310cf84ff0a79022ab34c45bc2b27ac2d8ff

Download Submit
memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1380-1-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/1380-2-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/1380-3-0x0000000000890000-0x0000000000896000-memory.dmp

Filesize
24KB

Download
memory/1380-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4800-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4800-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4800-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download