8151f8bc434a7366a551e39361878a77b2b7852a6bd3040d45c0eab538adb94f

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
12-05-2024 04:19

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General

Target

2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe
Size

39KB
MD5

a2343cceaf5bb63358649354554779a8
SHA1

ddc3959d9e915fa4b8e37197c01579b2fbe6e60d
SHA256

8151f8bc434a7366a551e39361878a77b2b7852a6bd3040d45c0eab538adb94f
SHA512

84d6da2d715ec2eb8e267777796f8682fe36cd9de0220ed0bb5bfabff2f0ef365d9e3713bcfc233fb040100b0f0b12a3f5954fe77ac9692b2d49a323ac9cdbce
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan87:qDdFJy3QMOtEvwDpjjWMl7Tdn87

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1992-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_set1
behavioral2/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1992-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023298-13.dat	UPX
behavioral2/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1992-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1992	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023298-13.dat	upx
behavioral2/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1992-26-0x0000000000500000-0x0000000000510000-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 2860 wrote to memory of 1992	2860	2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe	82
PID 2860 wrote to memory of 1992	2860	2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe	82
PID 2860 wrote to memory of 1992	2860	2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-12_a2343cceaf5bb63358649354554779a8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1992

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
39KB

MD5
ce73b52fccef191baf321baec648063e

SHA1
cd4a7c912519b6cbe45069f65068eadad648d31c

SHA256
66d8307c462296ab4d4434133191045bba33ad7b29961d4317bff8f7724cef47

SHA512
99cb5407b9e7ec25ab1911c382571a46082d8d11b9032864b0b1d33fb2e7b53b2620f9366a27f20bd66c5e41cf1a29767c0bf64f3fb4c1a03d0a94b3ea53e440

Download Submit
memory/1992-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1992-25-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1992-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2860-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2860-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2860-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download