04f67fec147397e62fec99b403f60826a0d3c2d72840e53b06d80e8488dcea47

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 16:36

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General

Target

2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe
Size

61KB
MD5

7be114a268970d80571e557f13d6d060
SHA1

2d8a64d5ff5d82d0581f2df890c8670d215a77b6
SHA256

04f67fec147397e62fec99b403f60826a0d3c2d72840e53b06d80e8488dcea47
SHA512

5f12e3dfaaf85b3c4edffaa20c9f7621aff5aafe91266c4f2476f3209611f3efb225e61e181c3b62440c100e9ffc1ff8f4b26e63ddf7faa6fd387f990737b25e
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jK5:P8mnK6QFElP6n+gymddpMOtEvwDpjYP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3632-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_set1
behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3632-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3632-26-0x0000000000500000-0x000000000050F311-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	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3632	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000400000002271f-13.dat	upx
behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3632-26-0x0000000000500000-0x000000000050F311-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 3800 wrote to memory of 3632	3800	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	97
PID 3800 wrote to memory of 3632	3800	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	97
PID 3800 wrote to memory of 3632	3800	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3800
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3632

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=3592 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:2364

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
61KB

MD5
d3651ca07df665c42d039bc747dde32c

SHA1
48575d9840e5257113c35867484c6fb33f966ae5

SHA256
6e012bb9b2a3196c7f4e38f3f04c9ee5528de43a1c5040fa29daed8155f1664a

SHA512
559a73a3fc6e13d6414d68717e101aac775229c72d936e4dadc45bfe8ca76654d0fd149fe3b593a0cd93ed24cc4759153516378b6de322fd5c01b0058a6f1ccd

Download Submit
memory/3632-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3632-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3632-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3800-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3800-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3800-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3800-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/3800-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download