f59ac17599eb52b9f7aa8b3c37f75c27f71f34242f08d4ef353d929d001d5c27

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 14:44

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General

Target

2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe
Size

46KB
MD5

58821e840b1ba5889ea07f383ba53d00
SHA1

f80cad0cb3058bcd08a55ca833ac10dc946b2a18
SHA256

f59ac17599eb52b9f7aa8b3c37f75c27f71f34242f08d4ef353d929d001d5c27
SHA512

b32e75a0daad839671376bebd02c48599f78fb7b287bb00100266653ae03b04746ee48110fefa5bb3e124df64514f61a78b54b285186981d8597a023a94969e8
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MofL:qmbhXDmjr5MOtEvwDpj5cDtKkQZQhL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/808-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023212-13.dat	CryptoLocker_rule2
behavioral2/memory/1160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1160-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1160-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/808-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023212-13.dat	UPX
behavioral2/memory/1160-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/808-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1160-27-0x0000000000500000-0x0000000000510000-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1160	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 808 wrote to memory of 1160	808	2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe	83
PID 808 wrote to memory of 1160	808	2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe	83
PID 808 wrote to memory of 1160	808	2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_58821e840b1ba5889ea07f383ba53d00_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:808
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1160

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
46KB

MD5
feede5c2160f68eef4affd73e8b43b9b

SHA1
54147684b7cefab3e69cf082141a72d75c90db84

SHA256
3d2edde3573b6ca022f071898a61f78c0ab974ce1183ce54bded209e1bc103ea

SHA512
fbbacef85188a5652484e3ff644a79d1da446e85f7888237e9e94617cfaed500f66cdfe7b9dc35537c6a1d7221460272458d28007b58ba3d6153c3296f3d376b

Download Submit
memory/808-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/808-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/808-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/808-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/808-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1160-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1160-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1160-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1160-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download