46df551d25a35bd6bd0130de2a2a5118599c27d9929a1bb2af1fa6922c3e39b2

Analysis

max time kernel
149s
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
23-05-2024 01:24

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General

Target

2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe
Size

39KB
MD5

371846901ba23edb3d5b1a5fa45afc4a
SHA1

34aa21f0366fd576c36a3d26fa8d688a7d6104a6
SHA256

46df551d25a35bd6bd0130de2a2a5118599c27d9929a1bb2af1fa6922c3e39b2
SHA512

a0e43f8ec57991499dadba0bbb9b93bdb7423276fa4849960a9c935e596c8bfc77be369456b49440faf043af2f927993036a1df7c3d7d2736919bd173069feeb
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/9B:qDdFJy3QMOtEvwDpjjWMl7Ti

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4900-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5068-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4900-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5068-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4900-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	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

Processes:

2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

5068 asih.exe

pid	process
5068	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4900-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	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

Processes:

2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

description	pid	process	target process
PID 4900 wrote to memory of 5068	4900	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe
PID 4900 wrote to memory of 5068	4900	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe
PID 4900 wrote to memory of 5068	4900	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4900

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=4256 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:4692

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
39KB

MD5
94b1d3e934bf7f3d24eff367166a5f0b

SHA1
317a1186cc91d41de431013e3fe2fc673265d3a2

SHA256
aa10e5b73d436aff0b11cf00a90d19b0119819b81faed4161d944690549f745a

SHA512
6338b60574534f3ee0c460c419354c60e53187849818f3ae52b3f4ceb88e77f9d108f2d271e18a5591dc9b3780634ea1b03436d89bb2430244ccd8f229d3fa34

Download Submit
memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4900-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4900-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4900-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4900-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5068-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5068-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

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

Filesize
64KB

Download