31240b705cef3efb9a177b9357762bb3e4153580884be705c9c9f79175e4b607

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 14:44

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General

Target

2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe
Size

39KB
MD5

93f2528669d76e45d075d5455417caa5
SHA1

bdf8d61cbde33b6f55edfa4293df3b99e29a50c4
SHA256

31240b705cef3efb9a177b9357762bb3e4153580884be705c9c9f79175e4b607
SHA512

c893fffc6f6dc741c3095ce245140dac035722e692b19eadb600d5e7f1f1ac997c5046949e041c2a30f66ea8b2a85ee2bc561f4b33370197bd647cd15239d5aa
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLp6A:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLR

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4496-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/4496-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4496-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/4496-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5060	asih.exe

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 4496 wrote to memory of 5060	4496	2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe	86
PID 4496 wrote to memory of 5060	4496	2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe	86
PID 4496 wrote to memory of 5060	4496	2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_93f2528669d76e45d075d5455417caa5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5060

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
ffccaff1c630b6a60067838f9156e9b8

SHA1
af26256395fe768f69eaaee5de4a895a1673fbae

SHA256
9165c52b767d4f5d904dbd3cc8de18a28d67ede294a560239019e7b90806209f

SHA512
a834b94003c98e7721920a58972619575829985bd76e60d13342b10a111466ba756dcd08a28fa43bcc7275c4f4d4d954379e00820321050ba4b0f6c151bd8898

Download Submit
memory/4496-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4496-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/4496-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/4496-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4496-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/5060-19-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/5060-21-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download