e151f5d6866515173ff127f1de99c74f4ec33bcc6877e379925a0bc169522acb

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 04:27

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General

Target

2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe
Size

82KB
MD5

de2f4b8cb6e449665e8d9ac75b50cac1
SHA1

bd7ed654ccd59716773babe47107c17aa9513345
SHA256

e151f5d6866515173ff127f1de99c74f4ec33bcc6877e379925a0bc169522acb
SHA512

87715accfce294986f62c61a501439a50e70402b851af3397fedb858253c5ddbfd1342a0d80b55a3990ee40ea53a34f6f236490b55061b79192e31cdf3b4b914
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT76Hh:T6a+rdOOtEvwDpjNu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1184-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002323d-13.dat	CryptoLocker_rule2
behavioral2/memory/1184-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1184-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002323d-13.dat	CryptoLocker_set1
behavioral2/memory/1184-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1184-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002323d-13.dat	UPX
behavioral2/memory/1184-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2488-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2488	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1184-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000900000002323d-13.dat	upx
behavioral2/memory/1184-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2488-26-0x0000000000500000-0x0000000000510000-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 1184 wrote to memory of 2488	1184	2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe	87
PID 1184 wrote to memory of 2488	1184	2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe	87
PID 1184 wrote to memory of 2488	1184	2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_de2f4b8cb6e449665e8d9ac75b50cac1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1184
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2488

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
82KB

MD5
17509382c00da35b5637e57ca8ecb64a

SHA1
8043c2924b0642c975ec1a6b4a80b4ec6acef7de

SHA256
4ce7d5f5e37ab7ce2f613671daaf03ad3db2929d040cbb00af8e670216680f69

SHA512
7c923f3b5ce1de70b7c04dc876d12fe0f82301b0cd21e2135dc8f701848aca952715af0f724ac1de69886421684d3b92e2d9dc9d7fa1e362b473faf83e96dcf5

Download Submit
memory/1184-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1184-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1184-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1184-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/1184-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2488-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download