1ce480303a4dd955c672e408e784d7f5817dfab15d37e8b0b0972cf914b77552

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03-05-2024 07:27

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General

Target

2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe
Size

77KB
MD5

6b094b634f66a3a08e508359725ea0cc
SHA1

1c5fc75f3ee75824657c4dbfa1f1be077580c2f1
SHA256

1ce480303a4dd955c672e408e784d7f5817dfab15d37e8b0b0972cf914b77552
SHA512

35cb628414fa958edb1d6b9137125d8895df9b5e0910505dbd96f26cab545f31bfb696c5501835123d976ab33747f507468407f8da6f006f646e5b34bd07b5ce
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxnC:T6a+rdOOtEvwDpjNtHPx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b4c-13.dat	CryptoLocker_rule2
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2440-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2440-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b4c-13.dat	CryptoLocker_set1
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2440-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2440-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b4c-13.dat	UPX
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2440-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2440-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2440	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b4c-13.dat	upx
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2440-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2440-27-0x0000000000500000-0x0000000000510000-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 116 wrote to memory of 2440	116	2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe	84
PID 116 wrote to memory of 2440	116	2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe	84
PID 116 wrote to memory of 2440	116	2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_6b094b634f66a3a08e508359725ea0cc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:116
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2440

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
77KB

MD5
0135047c84903b0c007c6a23a076406d

SHA1
41f900d825c9b4f0b704529bea55e8f3ac1b2db9

SHA256
894ccef21c779decfa2bd5919b2003ea262d59112728feb3710e578aee53d737

SHA512
3f467807ed4335085c26a36a3cf3bfa63aab369530be1a62f7143215921e621de751b1ede547208af3f066f299ec33bb91d24fbcf13627d1354d5d382714d30c

Download Submit
memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/116-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/116-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/116-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2440-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2440-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2440-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2440-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download