cdb4d4c6d5377aa7973d1ac0db6810f24d3aa337d51ea66ec39b27e370c72c81

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18-03-2024 10:47

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General

Target

2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe
Size

88KB
MD5

bcb246f1f242c0f7cc90c4325c6ad42d
SHA1

e79ffdec878c6a4e8af07274b95f7982243cbd94
SHA256

cdb4d4c6d5377aa7973d1ac0db6810f24d3aa337d51ea66ec39b27e370c72c81
SHA512

2bbca789758d0d1819a36d78d893a18f59bb734b57a71b315020e6abfb69d00ff6fffd89f1f4b3a1a711a20f0c8c9ba1028e9621cad925ab6a8edfdfc7b50006
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgSfq:AnBdOOtEvwDpj6zz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/944-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002323b-14.dat	CryptoLocker_rule2
behavioral2/memory/2204-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/944-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002323b-14.dat	CryptoLocker_set1
behavioral2/memory/2204-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/944-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002323b-14.dat	UPX
behavioral2/memory/2204-27-0x0000000000500000-0x000000000050F000-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	2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2204	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/944-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/944-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002323b-14.dat	upx
behavioral2/memory/2204-27-0x0000000000500000-0x000000000050F000-memory.dmp	upx

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 944 wrote to memory of 2204	944	2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe	100
PID 944 wrote to memory of 2204	944	2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe	100
PID 944 wrote to memory of 2204	944	2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_bcb246f1f242c0f7cc90c4325c6ad42d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:944
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2204

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=1424 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:2372

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
88KB

MD5
bd184707a765efbf35562c53c97abaef

SHA1
0a9f7a85059b7611c0fa3f59679a264c24f3036a

SHA256
82ef2e00664cc918e277ae6c4096a2181517a57487126a006b58fcb3d4d392b6

SHA512
77a557242e1373470f8b6e4cf5dd34e6183c2ed69a23de18a42d355f3216b7bafa44267e707f8a25ebfaf0accb4a1ed3fd085e34c6dae8a0fa01c8b76a3d2cc1

Download Submit
memory/944-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/944-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/944-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/944-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/944-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2204-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/2204-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2204-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download