aa244a7d09ade7cbfa4e658ff824bdbf6eaba6ae7b96e138977081a0df0ff254

Analysis

max time kernel
159s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 16:51

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General

Target

2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe
Size

61KB
MD5

b23cf1f12213189fdff58986eed58c08
SHA1

b8d5379f8578fa898e2b8e16e8426870e9d8ed6c
SHA256

aa244a7d09ade7cbfa4e658ff824bdbf6eaba6ae7b96e138977081a0df0ff254
SHA512

b6b39d75703cfce227323050c366bbad780ab43e17b6a98ccd5723cc6bfa41a6c8a7296a2a77261ef6545132dda2ab6f1518f9e68e20c95a94bc8902f6b5dac5
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J59Ax:T6QFElP6n+gxmddpMOtEvwDpjwa39M

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3916-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023272-14.dat	CryptoLocker_rule2
behavioral2/memory/1568-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3916-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023272-14.dat	CryptoLocker_set1
behavioral2/memory/1568-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3916-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3916-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023272-14.dat	UPX
behavioral2/memory/1568-26-0x0000000000500000-0x0000000000510000-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	2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1568	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3916-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3916-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023272-14.dat	upx
behavioral2/memory/1568-26-0x0000000000500000-0x0000000000510000-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 3916 wrote to memory of 1568	3916	2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe	104
PID 3916 wrote to memory of 1568	3916	2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe	104
PID 3916 wrote to memory of 1568	3916	2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe	104

C:\Users\Admin\AppData\Local\Temp\2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_b23cf1f12213189fdff58986eed58c08_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1568

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=3912 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:2908

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
62KB

MD5
4991daa76ba612948608cf2b22457e56

SHA1
15422f05727174d00c9499b4c1d91812b06fde96

SHA256
ca4fb25791bbfa0a35379a34d76333c260eef640a9448cdb3e55725606976c55

SHA512
9c8434ba90681c953c32f466b277c2ec2408aff33f20268e32e48d1b8ba5080e0dcf3a132282de5d3bbb4cf10ab2af5d8cd3cfeee17c22125670f1106e228cfd

Download Submit
memory/1568-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1568-19-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/1568-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3916-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3916-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3916-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3916-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3916-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download