13f5f5d4ce5863d74559d48f4363e8aa93fd0760c5d47cbde587c4286e3008bf

Analysis

max time kernel
152s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 19:52

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General

Target

2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe
Size

40KB
MD5

4fba0e7362dce7933eb8b172998d7968
SHA1

88e28e95d1707c4562f3704c3b4e9587165772e5
SHA256

13f5f5d4ce5863d74559d48f4363e8aa93fd0760c5d47cbde587c4286e3008bf
SHA512

c6677809dbb5adf291012f18308009d71b592463e42cd0df86f85a95bab587eb604bf35228868bca50e09e0f266ffc71989027455478ed5d87e750fb8630b711
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYo/:qDdFJy3QMOtEvwDpjjWMl7Tl/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/756-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/756-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/756-27-0x0000000000500000-0x0000000000510000-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:

2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

756 asih.exe

pid	process
756	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/756-27-0x0000000000500000-0x0000000000510000-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:

2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe

description	pid	process	target process
PID 5008 wrote to memory of 756	5008	2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe	asih.exe
PID 5008 wrote to memory of 756	5008	2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe	asih.exe
PID 5008 wrote to memory of 756	5008	2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4fba0e7362dce7933eb8b172998d7968_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5008

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:756

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=3740 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:3140

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
40KB

MD5
f63a07c80918221f0f5e8d582d112e85

SHA1
0b9110a8746c161f47c717a4ac64ed657744d637

SHA256
94531345825c6ff9b38e2ba50815b73dc5806bc92a29c555bf83ae4ba0ca456d

SHA512
9b3263fb89ad9fbe879688238298426011607080f9562a47bac7d819e295e9d953d26e65a0b073638c8d6c0d36aa1a95957f7a2743a2684a92d0a48459f58b88

Download Submit
memory/756-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/756-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/756-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5008-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5008-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5008-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download