f18e95f71574a08a007f7cb3602b1baa6ed88f9002b4b70f3fac581d45c162c6

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
13/05/2024, 19:53

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General

Target

2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe
Size

59KB
MD5

ec59b8e091b21778377b6cb3d77ca73a
SHA1

e635ce39ede4fb6217d86404e3d33734dc1efba6
SHA256

f18e95f71574a08a007f7cb3602b1baa6ed88f9002b4b70f3fac581d45c162c6
SHA512

7b71214c891112a0bf1ac3c688da9c0c8c4c13995451b738d49f70f163905f0d1aaf5b5f3a72d8b708cdb390cfa00996c3e051085a5e9b3bf3aa5e7caa12cf01
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPYjn:H6QFElP6n+gou9cvMOtEvwDpjCpVXVn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000022f2b-13.dat	CryptoLocker_rule2
behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4064-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000022f2b-13.dat	CryptoLocker_set1
behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4064-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000022f2b-13.dat	UPX
behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4064-26-0x0000000000500000-0x0000000000510000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4064	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000022f2b-13.dat	upx
behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4064-26-0x0000000000500000-0x0000000000510000-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 3448 wrote to memory of 4064	3448	2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe	82
PID 3448 wrote to memory of 4064	3448	2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe	82
PID 3448 wrote to memory of 4064	3448	2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-13_ec59b8e091b21778377b6cb3d77ca73a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3448
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4064

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
59KB

MD5
f7c6e426f09a4d7e73621b0e6304ad2e

SHA1
670d688677289f75038d7f236d0c20e1c324d17a

SHA256
7c5463a6e1eee678694bfb9912736d106702c2deb1810bdc2c4bad9b6d8e04d4

SHA512
b84e4c91eedc8721e591253f0fb02e352d23b9290050d6f1b4d8f5ed6175e8c8b300e7923a1268dadcdadbe9345e6e58813a5c73baf7d0015e7b56ec07b7f5c9

Download Submit
memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3448-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3448-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3448-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4064-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4064-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4064-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download