b26521fa55e9ddd02522294affcda1815c6c736387c718c1ff7a42559662ce7b

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 08:46

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General

Target

2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe
Size

89KB
MD5

cc7d6aca6a99556baddb8d432368b86d
SHA1

c0944e8cf4d2eb6fbd7dcf9ee0e91cf64d5f6ace
SHA256

b26521fa55e9ddd02522294affcda1815c6c736387c718c1ff7a42559662ce7b
SHA512

04e7219e584b53cd3408afa67c754be9b4faac32182cccc81d1a6ccf53abae11ecbc168aed576b707fdd5e0f0507009fb8b852ffe3d7c7dd820b102c707b31fb
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddH:AnBdOOtEvwDpj6zz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2380-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023415-13.dat	CryptoLocker_rule2
behavioral2/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3352-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2380-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023415-13.dat	CryptoLocker_set1
behavioral2/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3352-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2380-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023415-13.dat	UPX
behavioral2/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3352-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3352	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2380-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023415-13.dat	upx
behavioral2/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3352-26-0x0000000000500000-0x000000000050F000-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 2380 wrote to memory of 3352	2380	2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe	86
PID 2380 wrote to memory of 3352	2380	2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe	86
PID 2380 wrote to memory of 3352	2380	2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_cc7d6aca6a99556baddb8d432368b86d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3352

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
89KB

MD5
ffaab51a1f35a9ab46bc277a7908dfa4

SHA1
fbe990bcb43f6bceb334d0a0349a83534bc1df07

SHA256
b3c71cac48369b2bd77670190b60b9527a04d35827febbce20535273990c7f6b

SHA512
f09ab565e8de98ddc1fa364852734758ca5032ae1af82da03bc03fb6c53e8749c951791db044a0d945001bc932f2aa1be88d4d68fffec03aa1a8e19a625fb770

Download Submit
memory/2380-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2380-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2380-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2380-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3352-19-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/3352-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3352-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download