83d4939affd607abf19156fc5e21471c590ad531657aa277f90c1624961468af

Analysis

max time kernel
142s
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
04/06/2024, 17:21

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General

Target

2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe
Size

60KB
MD5

78b91176e69dc126d5de48e2562574f7
SHA1

813df889df3d8695b7f6706046aeb079c8f0c36e
SHA256

83d4939affd607abf19156fc5e21471c590ad531657aa277f90c1624961468af
SHA512

fee28f304909e4f7f528a613a839941c1725c746efea641d61e0dbd468e81f56e9f1078bedcb2f3e1dcfec2e01474655c71c88b082178f6578483ef0efc30bb2
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pn:H6QFElP6n+gou9cvMOtEvwDpjCpVX5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_rule2
behavioral2/memory/4796-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_set1
behavioral2/memory/4796-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023256-13.dat	UPX
behavioral2/memory/4796-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-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	2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4608	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023256-13.dat	upx
behavioral2/memory/4796-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4608-26-0x0000000000500000-0x0000000000510000-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 4796 wrote to memory of 4608	4796	2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe	91
PID 4796 wrote to memory of 4608	4796	2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe	91
PID 4796 wrote to memory of 4608	4796	2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_78b91176e69dc126d5de48e2562574f7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4608

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=3700 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:3328

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
60KB

MD5
8eb1e48a5393cc0f8892153c610bd236

SHA1
f53f6104cc108478bae74dbb2bba74295107b1eb

SHA256
fa78749db206ce489b3551110894cc6b57d0959fc4342fa47ba3cfd61ded0673

SHA512
823fe5f73c56e89bef10bfbc41ed6dd1dea3a29b4e1fe96fea34d8251ff2d3c3f0140981b23a4af846f775b6b8c8dbef3aa0ee10d046378bd828628d29dd46d6

Download Submit
memory/4608-18-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4608-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4796-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4796-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4796-3-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4796-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download