7430eb714bacfd290f93ad44135bb018c9e29793074fc3d48ad487c730d785bc

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 19:27

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General

Target

2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe
Size

39KB
MD5

29b057bf6e444cc7d8c1b9841eafbb59
SHA1

dde0d2fae4b7954ddbf46906d595a9d731c6542c
SHA256

7430eb714bacfd290f93ad44135bb018c9e29793074fc3d48ad487c730d785bc
SHA512

169ae145bffab4d4ca41b2d79170a668245f2efec4563ab876adeec15486c15285d16f862840c58d6b1326ef45e6edb31205472bd37cc2fbdebd34fc7624a627
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYjY6E:qDdFJy3QMOtEvwDpjjWMl7TkY6E

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4388-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/1412-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4388-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1412-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4388-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/1412-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4388-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1412-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4388-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/1412-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4388-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1412-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1412	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4388-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/1412-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4388-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1412-28-0x0000000000500000-0x0000000000510000-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 4388 wrote to memory of 1412	4388	2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe	82
PID 4388 wrote to memory of 1412	4388	2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe	82
PID 4388 wrote to memory of 1412	4388	2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_29b057bf6e444cc7d8c1b9841eafbb59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4388
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1412

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
39KB

MD5
e8fb2948672007a67304e89ff1d47feb

SHA1
cdc51d52a067c005e9f89a43fa87c14e6b6cb5ef

SHA256
7d71b0a2afbcc5650f8ee347775f0ff910fb0775e2997580a8628a9b41ec97b3

SHA512
a9cae7afe6d0a58fddbaf349c04484bb7a37ba1d57812ed36948c4c3fdffb5df8e903f6d88383697c9a81ea47cb00f1a355211060ae8babb63441453fdbfeea6

Download Submit
memory/1412-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1412-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1412-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1412-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4388-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4388-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4388-2-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/4388-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4388-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download