aadf2e27bdc69f66741ad71f8b1fe8f864a842077dc42b671e234e8dbb289d88

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23/02/2024, 04:47

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General

Target

2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe
Size

98KB
MD5

f2c0f87a1dd3f5de9e578b3c1d19c8c1
SHA1

818d49bd89b2ef1e2052f3d366e4acb444b03747
SHA256

aadf2e27bdc69f66741ad71f8b1fe8f864a842077dc42b671e234e8dbb289d88
SHA512

3ba73559523b676d1e4f674e2db76bd1a1cb5db5ffc07d45dbb2dc89f9406d6fc7592a2158974bd65a1f054906806a946144f2ac345ed3070d488ee541d576e2
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPGF26:AnBdOOtEvwDpj6zP6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000231f9-13.dat	CryptoLocker_rule2
behavioral2/memory/2228-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/952-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00060000000231f9-13.dat	CryptoLocker_set1
behavioral2/memory/2228-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/952-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00060000000231f9-13.dat	UPX
behavioral2/memory/2228-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/952-26-0x0000000000500000-0x000000000050F000-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-1-5-21-2200714112-3788720386-2559682836-1000\Control Panel\International\Geo\Nation	2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
952	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00060000000231f9-13.dat	upx
behavioral2/memory/2228-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/952-26-0x0000000000500000-0x000000000050F000-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 2228 wrote to memory of 952	2228	2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe	78
PID 2228 wrote to memory of 952	2228	2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe	78
PID 2228 wrote to memory of 952	2228	2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe	78

C:\Users\Admin\AppData\Local\Temp\2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_f2c0f87a1dd3f5de9e578b3c1d19c8c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:952

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
98KB

MD5
aed602a9de20a55621d27836523b8e01

SHA1
dd4bb58ff00bfede0cad4c8daf640f7b4aa10b29

SHA256
7e940e9a7d7f0c252a992d36306a91b95eaa1d9fdfd9964f829bbe5a34ea3c3d

SHA512
eec41d7f8ee97906c7546f3bdc387e835ba970b7f4a70303646e9d0f4a478b014ed92f8d8599c44556418c94a0eb2b2ec1a4f308bcb5c3cab5c5273e86b146e2

Download Submit
memory/952-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/952-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/952-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2228-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2228-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2228-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2228-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2228-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download