5a8df0d1c89dd780ccb964292945346cb94582cc8f4b06ee1061563ec055f75c

Analysis

max time kernel
155s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 12:33

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General

Target

2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe
Size

61KB
MD5

6553bd589058f7c804b5f2f59022c7a8
SHA1

45c107beb4a3b52e76bb668d29dc12a6608ca4d4
SHA256

5a8df0d1c89dd780ccb964292945346cb94582cc8f4b06ee1061563ec055f75c
SHA512

d2f97a05ad58f8a7a963eab58676b0ffa1642b7082de8653572051edc7bf14efec3e50c368408df6526b8bc68f73eea06e210a6937cddd2eb5d755943b317b0f
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsE:BbdDmjr+OtEvwDpjM8M

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4704-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023127-13.dat	CryptoLocker_rule2
behavioral2/memory/4704-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/116-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/116-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4704-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/116-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/116-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4704-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023127-13.dat	UPX
behavioral2/memory/4704-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/116-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/116-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
116	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 4704 wrote to memory of 116	4704	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	83
PID 4704 wrote to memory of 116	4704	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	83
PID 4704 wrote to memory of 116	4704	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:116

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
aff84fad431cf4d15110c4920a38a432

SHA1
1560a50d36589e3302722616912d93bd44606c3c

SHA256
0069f3acde30c9996a1ccb7884524e35e70b445b8aaea0d0e8af7fc225e9de21

SHA512
6abf00cf4101b178242f07037655ddc0ac1bab30877ac66e9c8b140ce107918dc8977f6c0ea1314ceaf066ea9509cd13b9c36d7b4d9a45060abad1dc88d31223

Download Submit
memory/116-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/116-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/116-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/116-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4704-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4704-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4704-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4704-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4704-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download