2743c92a07f50d34456c687b1fab594e2fda86ffb9e7a11b72f23d3fe95a2d1e

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22-04-2024 15:34

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General

Target

2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe
Size

22KB
MD5

5f0b47ecc8a05f48a957a1fbe084916c
SHA1

4def0310b81fb5cdd4196a0326b74757bf62ae61
SHA256

2743c92a07f50d34456c687b1fab594e2fda86ffb9e7a11b72f23d3fe95a2d1e
SHA512

c8d7db2a818263c0747fd5224577ed793c05b60651444017db869c92e816f692087ba175bc3bfd9ff42af9b8ef0b36892b11004e8f3fb3016ea37e8caa3a0d28
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6Hjx:bVCPwFRo6CpwXFXSqQXfjAd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4140-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023219-13.dat	CryptoLocker_rule2
behavioral2/memory/4140-20-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4576-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4140-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000b000000023219-13.dat	UPX
behavioral2/memory/4140-20-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4576-26-0x0000000008000000-0x000000000800E000-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	2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4576	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4140-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000b000000023219-13.dat	upx
behavioral2/memory/4140-20-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4576-26-0x0000000008000000-0x000000000800E000-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 4140 wrote to memory of 4576	4140	2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe	90
PID 4140 wrote to memory of 4576	4140	2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe	90
PID 4140 wrote to memory of 4576	4140	2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_5f0b47ecc8a05f48a957a1fbe084916c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4576

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=3792 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:2956

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\hasfj.exe

Filesize
23KB

MD5
9c3e168ce5e528672d58f2d7193281e6

SHA1
daf3e291c8ed31c053c30e9d08ed1ba8cca45460

SHA256
09ebfbe4a7c2cdab2a4830b0ab6e63fe5cf89ca1c54bb205890ded70a24780a9

SHA512
ae3e0ef64d023a519ce841d91597a4deca3052e6651dbed71a47460087324e8f801b0b42781f7296a9df41e2a9e68f28f569327afb3bba9d81d477a3c9f2960b

Download Submit
memory/4140-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4140-1-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4140-2-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4140-3-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/4140-20-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4576-18-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/4576-19-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4576-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download