9083495c2ebf8ff06432e84a6bb62389bf902576ba796f8c014da3881c78d827

Analysis

max time kernel
149s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 09:34

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General

Target

2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe
Size

61KB
MD5

5896b20b6c532a11ecd7bb292786ef3a
SHA1

2f6beeadf55c3527912d3ae7186d2740026c16c4
SHA256

9083495c2ebf8ff06432e84a6bb62389bf902576ba796f8c014da3881c78d827
SHA512

25b3ca8375b8e3e8eb16333c002b18dae51fdde891a73492ed8cc7d5f1c39d2f675544b6483d7cec4eb461b6ad5b15818994b286b196d17f07107d34f0f7ecf7
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgts5:BbdDmjr+OtEvwDpjM8h

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2912-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db2a-13.dat	CryptoLocker_rule2
behavioral2/memory/2912-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4716-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2912-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4716-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2912-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000001db2a-13.dat	UPX
behavioral2/memory/2912-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4716-25-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4716	asih.exe

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 2912 wrote to memory of 4716	2912	2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe	95
PID 2912 wrote to memory of 4716	2912	2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe	95
PID 2912 wrote to memory of 4716	2912	2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_5896b20b6c532a11ecd7bb292786ef3a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2912
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4716

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=3760 --field-trial-handle=3084,i,11997299123381683778,5904351605020331957,262144 --variations-seed-version /prefetch:8
1⤵
PID:544

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
61KB

MD5
aa13897daaeea6ef6fdd919f615753a5

SHA1
316d8c79eeccc8ea7eb4b7311d11939dbc58d78f

SHA256
4d29b8cc9abfc9b4783b30225dd56a267f6ddde99d9274fe64abf2e1588e6e78

SHA512
5c5c4837f274c15954023b49d84ada32832a7b2d38b169778a74b837772e5f459e1244093fed85ecab850e14a36a13046a6684c68258f7797bece52a3f94b46d

Download Submit
memory/2912-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2912-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2912-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2912-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download