fa215ee3cf7d544bb6e06e2b6d425d9c293ba4249232da3a0cc56cdd18ec3cfa

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 02:26

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General

Target

2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe
Size

70KB
MD5

2cfa43e8520402696c1ddd84c267b7b6
SHA1

4676d448a02e0bdd37ea23a00d5c5be37b1d3cf8
SHA256

fa215ee3cf7d544bb6e06e2b6d425d9c293ba4249232da3a0cc56cdd18ec3cfa
SHA512

3d72c4c262aaf6d873b58f568f538458724a011c3b6a81dc07198636732da46904ec87a23ca1e252b4b43dcb965b1c452cb7511f62decb9f450d8baf83a39adf
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9K:C4Q2c94OtEvwDpj4H8zv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4132-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023560-13.dat	CryptoLocker_rule2
behavioral2/memory/4132-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4220-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4132-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4220-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4132-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023560-13.dat	UPX
behavioral2/memory/4132-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4220-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4220	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4132-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023560-13.dat	upx
behavioral2/memory/4132-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4220-26-0x0000000000500000-0x0000000000510000-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 4132 wrote to memory of 4220	4132	2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe	94
PID 4132 wrote to memory of 4220	4132	2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe	94
PID 4132 wrote to memory of 4220	4132	2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_2cfa43e8520402696c1ddd84c267b7b6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4132
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4220

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 --field-trial-handle=4120,i,7447082786332118630,10839110169592584063,262144 --variations-seed-version --mojo-platform-channel-handle=4196 /prefetch:8
1⤵
PID:2252

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\misid.exe

Filesize
70KB

MD5
86eb34d51e6e55d62601b209bbf1a53a

SHA1
290c07d176840773f57ae3f198daa08e61bbd895

SHA256
f9ad0d06de78391d4944819ac9d470b129d3b58b5b86a3dfaa3de3bd76638d8d

SHA512
1971a0db7d5015a428aa71a8bb8e23f8b2a20b32d94a468a365c52e7302ad287c0a3f29d8ad19433a9081333197f7681640bf79f08a8f005fb54cdcde5a9c19e

Download Submit
memory/4132-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4132-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4132-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4132-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4132-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4220-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4220-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4220-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download