3a338580ea7e356764da136475b8c563e22d771665ee01a6e843fb0ace751bfd

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/03/2024, 00:58

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General

Target

2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe
Size

126KB
MD5

ab52184e2b09537a9c62d8f7d8f3b5e9
SHA1

ef0066999894b40f3805307a2934b9916e39b9d1
SHA256

3a338580ea7e356764da136475b8c563e22d771665ee01a6e843fb0ace751bfd
SHA512

87c759abc973041814c2ffaf1dc95f1874886f1901ebb62ec4cf1c3fa1b3e7d306a013c5b46c55955eb86689425a55197878d50fd350a3a585a406b79ec4ee43
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIL:AnBdOOtEvwDpj6zy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_rule2
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2232-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_set1
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2232-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000001e59e-13.dat	UPX
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2232-26-0x0000000000500000-0x000000000050F000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2232	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000001e59e-13.dat	upx
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2232-26-0x0000000000500000-0x000000000050F000-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 3008 wrote to memory of 2232	3008	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	90
PID 3008 wrote to memory of 2232	3008	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	90
PID 3008 wrote to memory of 2232	3008	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2232

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
127KB

MD5
77808d5bdaddde5b914fcfca20e41d8f

SHA1
7cbc3185a3faaee404b9a1a1781fdf726149a448

SHA256
9647bfd44360e0252ff995c06eef81117906af4c78b5ca58c2add8d6c34f91c1

SHA512
8ac4ecaebdd76778e4c42be2312d969a936f2012cd97fc9c8bcf8f9617a1402d8c2fbfcbee0b1d527c0bb4254f555fe316dd733f70b056d49d502d556adcd719

Download Submit
memory/2232-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/2232-20-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2232-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3008-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3008-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3008-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download