545b7d25e6694cb2df8cb3600db444675bedab9d13fde8928b1c283f84e40465

Analysis

max time kernel
149s
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
31/05/2024, 18:36

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General

Target

2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe
Size

92KB
MD5

8ae06a82a6f233dd23d5a117f6ebad87
SHA1

df8acc336a36e5c4930d501925b5048ff2fb4b56
SHA256

545b7d25e6694cb2df8cb3600db444675bedab9d13fde8928b1c283f84e40465
SHA512

f6809e2efa8ca4d3007bf6b09f62f44bc3badd68174478881e4a81c40a7beb9d592bdb379b67c1e087c796711200727cbe2eaa8d09177951b24c4109041f84fe
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/DY:n6a+1SEOtEvwDpjYYvQd2Pb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4484-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023286-13.dat	CryptoLocker_rule2
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4484-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3692-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4484-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023286-13.dat	CryptoLocker_set1
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4484-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3692-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4484-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023286-13.dat	UPX
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4484-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3692-26-0x0000000000500000-0x0000000000510000-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	2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3692	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4484-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023286-13.dat	upx
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4484-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3692-26-0x0000000000500000-0x0000000000510000-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 4484 wrote to memory of 3692	4484	2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe	82
PID 4484 wrote to memory of 3692	4484	2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe	82
PID 4484 wrote to memory of 3692	4484	2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_8ae06a82a6f233dd23d5a117f6ebad87_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4484
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3692

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
92KB

MD5
33dd885f4427f15e2c3e04e163be68b9

SHA1
3005f6ab56c8c1011e83b0a9ac3d39070181d401

SHA256
dae391d287d1897c5c5560a3be952671cfb2f450f8fe8ffc58cb3af28b5bc11f

SHA512
ff9922100a8962557add4da3e83baee517320b9315b50552887d0ee04dfb36f2b81b084d0dbfa41efdaeb001dc78c48c4cfa59d994467c4aa661c65a8e688670

Download Submit
memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3692-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4484-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4484-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4484-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4484-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4484-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download