55acccdc197176b93d0e0383492cd643cd539c6f884234e70a9689dd966751c3

Analysis

max time kernel
143s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 11:46

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe
Size

120KB
MD5

6b03267d14edee8fa73a4d628f4ddaa0
SHA1

3b93e0e1619f7852f51954685ab103b358422621
SHA256

55acccdc197176b93d0e0383492cd643cd539c6f884234e70a9689dd966751c3
SHA512

34e41c86483e71d8c1ae92360ea69377ddfb71c1436a8124dfb9ab7bf09245fff68559bcedff04af8946d728540b747a4341be761f0a98dd888ef44eff8e2592
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgpwqWsviy9t3k:z6a+CdOOtEvwDpjczJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023005-13.dat	CryptoLocker_rule2
behavioral2/memory/3908-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/664-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023005-13.dat	CryptoLocker_set1
behavioral2/memory/3908-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/664-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023005-13.dat	UPX
behavioral2/memory/3908-20-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/664-26-0x0000000000500000-0x0000000000510000-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	2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
664	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023005-13.dat	upx
behavioral2/memory/3908-20-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/664-26-0x0000000000500000-0x0000000000510000-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 3908 wrote to memory of 664	3908	2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe	94
PID 3908 wrote to memory of 664	3908	2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe	94
PID 3908 wrote to memory of 664	3908	2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_6b03267d14edee8fa73a4d628f4ddaa0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3908
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:664

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=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:4256

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

Loading Replay Monitor...

Downloads

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

Filesize
120KB

MD5
7267a7b677cffe472d8ff12dae79fa58

SHA1
1dc1ce377e6093818ec4e0c05754baf97421abe0

SHA256
0126544748c66619ec523822e9df10f4ea13f8f15a267465a5946480ce4ba937

SHA512
5460a257cdf94270ab5cb7e669b91a5f9703198467e022ec6faad1d9f22f7286f8fd5cd76fa39d19415a1fd3204108e323d1b74375566e31cd6a25cd6b917590

Download Submit
memory/664-18-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/664-19-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/664-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3908-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3908-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3908-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3908-20-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download