3ea46dad05c3dce6d6b697b43d1b90f17d2c05d80a99c9410695d71434aa5370

Analysis

max time kernel
156s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 22:40

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General

Target

2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe
Size

68KB
MD5

ed69462a82aafce17010f9c470b02aaa
SHA1

97611c2d4ce0b1691c2c7315750cdba2a75b5a6f
SHA256

3ea46dad05c3dce6d6b697b43d1b90f17d2c05d80a99c9410695d71434aa5370
SHA512

f4a90a4f61fcfeb2da215c95a8448ec21efbdd816f500e078dedc4cf197da3f8a8e6491508934413f590b48bfa46f48587538185e38572f2a1ddb1a1a0220479
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Ps:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4768-2-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023285-15.dat	CryptoLocker_rule2
behavioral2/memory/388-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4768-2-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023285-15.dat	CryptoLocker_set1
behavioral2/memory/388-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4768-2-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0009000000023285-15.dat	UPX
behavioral2/memory/388-28-0x0000000000500000-0x000000000050F000-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	2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
388	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4768-2-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0009000000023285-15.dat	upx
behavioral2/memory/388-28-0x0000000000500000-0x000000000050F000-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 4768 wrote to memory of 388	4768	2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe	91
PID 4768 wrote to memory of 388	4768	2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe	91
PID 4768 wrote to memory of 388	4768	2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_ed69462a82aafce17010f9c470b02aaa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:388

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=3760 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
1⤵
PID:3720

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
68KB

MD5
853cc68aa64bfe542e61374377f0f6ce

SHA1
8809ca344f75969a980d1e6beea2993cd6101f22

SHA256
fd5542361c188d9cfddb555a1ec38732d8d3d4d36ea7287952462718bb7aeadc

SHA512
71ffeaa2f5081f65ffced57be66d1f3997880a568af2d228f187e260f05658481370e534942442c4ea20e041b5adda059cba4bf84a4d98077e422363b2a06fce

Download Submit
memory/388-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/388-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/388-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4768-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4768-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4768-2-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4768-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4768-4-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download