889abd290b440b07d6fbda9603893f221a04dbab168314f1a0798a3b63cfc934

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 14:47

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General

Target

2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
Size

125KB
MD5

cdfb7ef0c116dd9ec2409b337b56cee0
SHA1

3946ab6c3169406bc7efa2e255c562bc125ce360
SHA256

889abd290b440b07d6fbda9603893f221a04dbab168314f1a0798a3b63cfc934
SHA512

bbdcdf65f0ce7dacb2e14bf1f9a0b33da8428eaeed37ad389341d438c104c4c20aefd8e2af60e55fd500ce560743ce71c662ac165de92bdfaabab930d87d453a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eU:AnBdOOtEvwDpj6za

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/972-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023118-13.dat	CryptoLocker_rule2
behavioral2/memory/972-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3480-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/972-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023118-13.dat	CryptoLocker_set1
behavioral2/memory/972-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3480-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/972-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023118-13.dat	UPX
behavioral2/memory/972-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3480-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3480	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/972-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023118-13.dat	upx
behavioral2/memory/972-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3480-26-0x0000000000500000-0x000000000050F000-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 972 wrote to memory of 3480	972	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	84
PID 972 wrote to memory of 3480	972	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	84
PID 972 wrote to memory of 3480	972	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:972
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3480

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
126KB

MD5
4397bb2d1f5dc633010daef9ce5e1edc

SHA1
ce1ad5053d7325b49a7a67f385404c658d81cfb4

SHA256
f91892f625deebacf6f97962397bd41bfc88015cc3e13d8bdf450b24246a995a

SHA512
8cfb436a3caea64c4599742b585d8f4f6165a570f802724c1209cf917c5d4bfc06803568c77647cd2e35946867879d2fa3d166c27e82962d6daa17e58a03bb65

Download Submit
memory/972-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/972-1-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/972-2-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/972-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/972-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3480-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3480-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3480-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download