dc03ac531cc8a889ef02d174af900fb5cc1c1ee9afe5673c3122606b1dcf93b9

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/02/2024, 09:35

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General

Target

2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe
Size

61KB
MD5

417c32f7d65dfd2377730addfb650eb4
SHA1

fc18162f41af6ca79228d0cd62a0af0b9ccf9c98
SHA256

dc03ac531cc8a889ef02d174af900fb5cc1c1ee9afe5673c3122606b1dcf93b9
SHA512

a938438dcd83f6be443b8cb94336b0b9502ad97a0d993fed2636cfbcff6b796d526a8233eb873157df11338cae8ade528d6a6dadbd43e2e079900ef0c1c51bfc
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsK:BbdDmjr+OtEvwDpjM8y

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2672-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023201-13.dat	CryptoLocker_rule2
behavioral2/memory/2672-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3304-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2672-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3304-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2672-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023201-13.dat	UPX
behavioral2/memory/2672-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3304-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3304	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 2672 wrote to memory of 3304	2672	2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe	89
PID 2672 wrote to memory of 3304	2672	2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe	89
PID 2672 wrote to memory of 3304	2672	2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_417c32f7d65dfd2377730addfb650eb4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3304

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
61KB

MD5
e07e5b595a57ac1417a11fae42f7633b

SHA1
e7e1929d8a5c77b3b7dda827c0965c0f21b183b0

SHA256
fc7875b5dc7678ddffb088114ee11ae4b48c36b97c8ddbb480a1e0805d179972

SHA512
bc59b655249d02796a204df534330a0f947b4769e9542abbe24f645f5edcca7f94ed459940ecdc1773e4d99159961917b90d950b8c123d1e4a94cc06521f7ff5

Download Submit
memory/2672-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2672-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2672-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2672-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2672-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3304-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3304-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3304-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download