67710bc79ebac7ad9a9146e0883d5d966393cedd699819070956bce7b38c4e8f

Analysis

max time kernel
144s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08-03-2024 10:34

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General

Target

2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe
Size

79KB
MD5

3dac57e63ce4bf71ed9c64ffee34c255
SHA1

68f2080e2bc6910703366ccef95ee0451e0d8983
SHA256

67710bc79ebac7ad9a9146e0883d5d966393cedd699819070956bce7b38c4e8f
SHA512

0b6b7e42487ad993081f14f96155610b4f3f3e729cbfd4ef8c2cf3a1a552add063f5a037aa39878dbff9f90967f804a90503c833f157df7fe52c9f540be3434a
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdphO:T6a+rdOOtEvwDpjNtM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/732-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023211-13.dat	CryptoLocker_rule2
behavioral2/memory/732-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4660-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/732-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023211-13.dat	CryptoLocker_set1
behavioral2/memory/732-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4660-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/732-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023211-13.dat	UPX
behavioral2/memory/732-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4660-26-0x0000000000500000-0x0000000000510000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4660	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/732-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023211-13.dat	upx
behavioral2/memory/732-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4660-26-0x0000000000500000-0x0000000000510000-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 732 wrote to memory of 4660	732	2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe	90
PID 732 wrote to memory of 4660	732	2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe	90
PID 732 wrote to memory of 4660	732	2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_3dac57e63ce4bf71ed9c64ffee34c255_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:732
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4660

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
80KB

MD5
5ac9b113c4ac8d6929463646dd3fdf48

SHA1
72cec570373310420f540cf624a72f9a40b195e0

SHA256
49b4ffef8844d8a076050511d6e3acaada2fa44a7d2fd31a701ee0204ebb1368

SHA512
ad72434dbcae8520966dbf2acf75d3e4dbefbf7f609386b637707f0943c10677ff765361342aeba8eedeffaf28f009d14e850203871455b191f2979a0f77ae59

Download Submit
memory/732-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/732-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/732-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/732-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/732-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4660-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4660-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4660-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download