46b5907f292a5a9c364b9b140caa3520c13ca392efc19280fc6d971879861062

Analysis

max time kernel
146s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 02:48

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General

Target

2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe
Size

53KB
MD5

8bec00d0844a59f96075e9055635419a
SHA1

f7da5e3afd05d41de87060065b0b5f07b6f72eeb
SHA256

46b5907f292a5a9c364b9b140caa3520c13ca392efc19280fc6d971879861062
SHA512

9074f5f88ef9c5bd1e039517a283698d95df52fb38e5fbe6cdd36ea4084d7cc55b560fe812c358c8fa090f05cb03e029a6fe4edc4c1846efb2495ab8799df2fa
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyU:BbdDmjr+OtEvwDpjMf

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1504-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/1504-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1400-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1504-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1400-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1504-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/1504-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1400-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1400	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 1504 wrote to memory of 1400	1504	2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe	97
PID 1504 wrote to memory of 1400	1504	2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe	97
PID 1504 wrote to memory of 1400	1504	2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_8bec00d0844a59f96075e9055635419a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1400

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=1408 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:4332

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
53KB

MD5
1cfab3b2f97f4fd60176263f9ab1128d

SHA1
ac9add748330009702b832f206d45361104b3f75

SHA256
5cc5f68ae03fdc24d53a981077b79cec8255b1d432569695cc33b0cf207c910b

SHA512
67ed311fc65f5ab311bf8a04d3c20dc69a38a9e7c631159645393d35eb1c6503ac6f61a904e3249b29f5697ba0071d403ca7dd965ab44b4737a6b770b5c634e1

Download Submit
memory/1400-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1400-20-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/1400-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1504-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1504-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/1504-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/1504-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1504-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download