9939480e157e5ec0c91d0880781872fd538ed0b176944818a7d658efedb77f46

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2024, 03:40

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General

Target

2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe
Size

38KB
MD5

6259c5775e1be0e0a7dd059b6643e561
SHA1

f3d4057e306068f477357ec58a76ff979d9fe0e8
SHA256

9939480e157e5ec0c91d0880781872fd538ed0b176944818a7d658efedb77f46
SHA512

bc85e73bd53b0716516cf25f230f4140f362b773a9a58250b28bc514e58767193d3c4a1ec5821b3b48dadb6cc605a4cbc939cf3b7a12c4acc15ba81c2d02bcbb
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9W:qDdFJy3QMOtEvwDpjjWMl7Tt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_rule2
behavioral2/memory/864-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_set1
behavioral2/memory/864-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b000000023227-13.dat	UPX
behavioral2/memory/864-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-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	2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2108	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b000000023227-13.dat	upx
behavioral2/memory/864-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-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 864 wrote to memory of 2108	864	2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe	89
PID 864 wrote to memory of 2108	864	2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe	89
PID 864 wrote to memory of 2108	864	2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_6259c5775e1be0e0a7dd059b6643e561_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:864
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2108

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=4236 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:3156

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
38KB

MD5
26b5b895ece1c3c1359d843dbc2744c9

SHA1
8e1640d079fc9d1ef0fa7a5702a94e71b8d6a69e

SHA256
38624050dd822333e3d725545ba7d40c52cf77bc2b6d171956f74d20675b5b46

SHA512
0e14136b2e53344ab92caee3768d49484221035b1ae72dae1acdfe64af8be3fb47a4b6b5d0433f0d1ce6000feeb2b4396628dbcbc6ce95831911757254e09ab5

Download Submit
memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/864-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/864-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/864-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/864-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2108-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2108-20-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download