9b3e6c81cfec05e172e581a01b1793f2119da6c3f25a410d9a63233c84b1d42b

Analysis

max time kernel
149s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 02:40

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General

Target

2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe
Size

31KB
MD5

b6d6ac520d154e14ec6de8f9eae054fb
SHA1

9691e3a3f8f094d4019bb41273c80ef5f2862329
SHA256

9b3e6c81cfec05e172e581a01b1793f2119da6c3f25a410d9a63233c84b1d42b
SHA512

139197ce3399dc76e927edb70399963f4dc0ae8ce20963db5a0b9ee454e47245c8433a9852f654b24203e7b0d82dfa3f3287b695577367ed4182283e95840404
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIO/xu3QI:q0zizzOSxMOtEvwDpj/arQ3QI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1620-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023283-14.dat	CryptoLocker_rule2
behavioral2/memory/4292-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1620-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4292-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1620-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023283-14.dat	UPX
behavioral2/memory/4292-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4292	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 1620 wrote to memory of 4292	1620	2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe	99
PID 1620 wrote to memory of 4292	1620	2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe	99
PID 1620 wrote to memory of 4292	1620	2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_b6d6ac520d154e14ec6de8f9eae054fb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4292

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=3720 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:2020

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
32KB

MD5
a9110da479992725cef7097161f6812a

SHA1
7ce67ccfc00ed452eb9e5bc64bd61c012fcdcf66

SHA256
b3e705feb7230bc72366cde153e1ecda5a896f490fb41ca3abdc9966eaaa8398

SHA512
3a810c051b8c33a702d648ff4e4e14762e78b5dfa8c3f2a67e2f7f8622fa901648274c459c596dd94c15247024de48c1fcfa0f5f30afb6e086167ee8c63f8242

Download Submit
memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1620-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1620-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1620-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/1620-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4292-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4292-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download