42b8e4b5204351eb9e4cfaf01434d97952385a572a41b4274d8194aee7fe2fba

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 05:25

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General

Target

2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe
Size

148KB
MD5

0a877aa7340771d8f36dfde3f2371340
SHA1

c793cc289ba563c3b663a1b4ef0acb0a062c454a
SHA256

42b8e4b5204351eb9e4cfaf01434d97952385a572a41b4274d8194aee7fe2fba
SHA512

4418df353aded43fed1a06da2d3d8e4ac2647846c6860ce714a2ff38804fcfa0b644dbe41700518f65879324436069293e3cfdaca9c82e27588dcf7653478065
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GNtL1e2l:z6a+CdOOtEvwDpjcz2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002303c-13.dat	CryptoLocker_rule2
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1660-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002303c-13.dat	CryptoLocker_set1
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1660-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b00000002303c-13.dat	UPX
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1660-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1660	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b00000002303c-13.dat	upx
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1660-26-0x0000000000500000-0x0000000000510000-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 1464 wrote to memory of 1660	1464	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	84
PID 1464 wrote to memory of 1660	1464	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	84
PID 1464 wrote to memory of 1660	1464	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1660

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
148KB

MD5
7398ac18a54a705594da2e81d118c116

SHA1
e27d396479f56ce3a738ebd94aefbc40315449d1

SHA256
4e65cddf4b117554bd7af92bb7179603389a5bab8f5d8768ea458c0c3a0a0c17

SHA512
f7b7e02c8816f05f747d9d28254909cd1b0f216ae925c0765f8edc9186886743aa67d11a0bb0da79de894531d912802fd6c209fbecfba2ba80502c4001ef14a3

Download Submit
memory/1464-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1464-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1464-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1464-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1660-20-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/1660-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/1660-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download