3893b0543e538db01966f7c0f637fb24bd834cc659b8e05bd0e6182297479c38

Analysis

max time kernel
145s
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
25/05/2024, 20:24

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General

Target

2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe
Size

40KB
MD5

dc8a097219c2ffa10361d3d02fa06f99
SHA1

66d1534b35446a4b0a9cbe737671bd572dce3ed6
SHA256

3893b0543e538db01966f7c0f637fb24bd834cc659b8e05bd0e6182297479c38
SHA512

59d9ca2e679ad8c89fc45d3da631e1c52ec6c8fa7d4037904c50fbee28865174a09222ebffbba1816ae94a3325c6a5f751db813bc02237f0bcd16295da54eb77
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBC:qDdFJy3QMOtEvwDpjjWMl7Tdw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4136-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023257-14.dat	CryptoLocker_rule2
behavioral2/memory/4380-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4136-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023257-14.dat	CryptoLocker_set1
behavioral2/memory/4380-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4136-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023257-14.dat	UPX
behavioral2/memory/4380-28-0x0000000000500000-0x0000000000510000-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	2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4380	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4136-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023257-14.dat	upx
behavioral2/memory/4380-28-0x0000000000500000-0x0000000000510000-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 4136 wrote to memory of 4380	4136	2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe	91
PID 4136 wrote to memory of 4380	4136	2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe	91
PID 4136 wrote to memory of 4380	4136	2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_dc8a097219c2ffa10361d3d02fa06f99_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4380

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:3256

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
0b8f1a365ebb20d38423346564a4525b

SHA1
f48fb50abaa5460b8084fb8a0eacc8368013c106

SHA256
0c7669666488cd74d8766d4f739f4ea85af48dacb3324fa87987bcc9bca1dee7

SHA512
020d3c66469eae51a75ad828808bc561fc1b271a1ae1b78050499eb214e306b3340bbb8803af6c42fa7edb97ad9f41f8c60235c4e656c84b07224d788546846d

Download Submit
memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4136-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4136-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4136-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/4136-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4380-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4380-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4380-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download