47f26b330c8afa32975e937bcb8ebf5a8ab8f22889bf9c309306a7d6965c7344

General

Target

2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe
Size

62KB
MD5

f2561ddefe9b3380835f76439f011099
SHA1

75e37957c4a9da783258e2cb071ea58cbd4aa7eb
SHA256

47f26b330c8afa32975e937bcb8ebf5a8ab8f22889bf9c309306a7d6965c7344
SHA512

39c44e0e6ceb66958e207d56fcab768bc548f82d577e1cbfd3ce38c13ceeeef99704e18cc02db75e7efe99c4c70572bb86a83a8bc1df7cf5c1360e67dbe933b6
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J59+we:T6QFElP6n+gxmddpMOtEvwDpjwa397e

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_rule2
behavioral2/memory/5068-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3844-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5068-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_set1
behavioral2/memory/5068-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3844-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5068-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023256-13.dat	UPX
behavioral2/memory/5068-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3844-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5068-27-0x0000000000500000-0x0000000000510000-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	2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5068	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023256-13.dat	upx
behavioral2/memory/5068-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3844-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5068-27-0x0000000000500000-0x0000000000510000-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 3844 wrote to memory of 5068	3844	2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe	96
PID 3844 wrote to memory of 5068	3844	2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe	96
PID 3844 wrote to memory of 5068	3844	2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-09_f2561ddefe9b3380835f76439f011099_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5068

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=3640 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:2248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
62KB

MD5
5ef867c8b0592514f564bd3347520c6a

SHA1
aeeb9f8751b185331e001ef9025f7dc251b13a02

SHA256
265d341bf309e360323c26a66598765d8576d0b035a0a165e69490bd03b562cb

SHA512
2a02dbc7c0ad1e746074bf770ed16c6d4366d1f75cdc0ba42fd5eac57be5b869dc98af5d84f2e1333b5153ab4928859d0d1f8f11e6f705dc984a36aa79e21475

Download Submit
memory/3844-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3844-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3844-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3844-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3844-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5068-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5068-20-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/5068-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5068-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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