56e037704bfbbaa6d2159f40a55e27d7759869be557cb40a46a5ed597a28189f

Analysis

max time kernel
145s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 16:51

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General

Target

2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe
Size

45KB
MD5

f6c48f9c9dc72653d1cbdbc79adfd3eb
SHA1

78390eccebc981ccff83460abc71662eea909834
SHA256

56e037704bfbbaa6d2159f40a55e27d7759869be557cb40a46a5ed597a28189f
SHA512

594cc0e881858de0bcec42245e141891651251d6446e2297637a71fd1dcfe44bfb0058cbe8560908e11e74c0328d781783ccc4832e037b731f6c53accdf042c6
SSDEEP

768:79inqyNR/QtOOtEvwDpjBKccJVODvy3J8Q:79mqyNhQMOtEvwDpjBzckqJ8Q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3824-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002332f-13.dat	CryptoLocker_rule2
behavioral2/memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3824-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3824-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002332f-13.dat	CryptoLocker_set1
behavioral2/memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3824-18-0x0000000000500000-0x000000000050F000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1544	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 3824 wrote to memory of 1544	3824	2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe	97
PID 3824 wrote to memory of 1544	3824	2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe	97
PID 3824 wrote to memory of 1544	3824	2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_f6c48f9c9dc72653d1cbdbc79adfd3eb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3824
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1544

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4512 --field-trial-handle=3136,i,3192284747741020952,1225278682167953346,262144 --variations-seed-version /prefetch:8
1⤵
PID:2184

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
45KB

MD5
6fa0529b8de9da3e7501305c03379c80

SHA1
8bd91a0699755e224d00b63ff362da3e33a31009

SHA256
9b7763977b9107fda09760d4c6b0138dcb494195717712eac6c50f439be72501

SHA512
6af46805a532c140ee23bb83e9924c2a89d63013e3a5abd3882251be8d2e9d0f47c46484ec8686d1f6240ff2704284a320c5f20b29e236210c35ee610c36903d

Download Submit
memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1544-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1544-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3824-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3824-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3824-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3824-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/3824-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download