26be61f8ccbfebdf84f4b22a9da3dfe75a3b7eb8050908d26407ba5424fea135

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 02:43

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General

Target

2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe
Size

94KB
MD5

be5e9cbb82f3cd1d01b7d6d9269626cd
SHA1

6b9ab94f4f0c5494ef52827994e6f230b5b3f77f
SHA256

26be61f8ccbfebdf84f4b22a9da3dfe75a3b7eb8050908d26407ba5424fea135
SHA512

aa3286c8b96237724723f4aab0b73fce202e3a6462c2ba6324d52e2fa76306546a58eb1db3fb0143466c4f6b7f27c315d62373679e3da5627f486bf11c7bfe35
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpYR:AnBdOOtEvwDpj6z/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/2852-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4572-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_set1
behavioral2/memory/2852-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4572-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/2852-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4572-26-0x0000000000500000-0x000000000050F000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4572	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/2852-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4572-26-0x0000000000500000-0x000000000050F000-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 2852 wrote to memory of 4572	2852	2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe	91
PID 2852 wrote to memory of 4572	2852	2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe	91
PID 2852 wrote to memory of 4572	2852	2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_be5e9cbb82f3cd1d01b7d6d9269626cd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2852
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4572

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
94KB

MD5
ac20fc4d990c520aaf907b7e783adca7

SHA1
72e328bbc36771257bf958de88fbb0648bddd95e

SHA256
0a1f67b96e6601571d83db537bf4b7dda81515a74c9049a82b7c6f4fb506e840

SHA512
602e63e50af67ae68eafc54856d46cc9a7ef55550bc23f3d3349ef13d6210f4e242015ba847934fa8231360591ef20a0b1cc6425533df236417c68dbcd0562d1

Download Submit
memory/2852-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2852-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2852-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2852-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2852-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4572-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4572-20-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4572-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download