0a7e6a79ee1e743f7652c541b44d823c4d432142e223666676d75c33de21e1c4

Analysis

max time kernel
115s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 15:25

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General

Target

2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe
Size

87KB
MD5

3aa1981c8647e9525eb027143193831d
SHA1

1e15bed50a73861eb625f6a3bc0581cc88f08943
SHA256

0a7e6a79ee1e743f7652c541b44d823c4d432142e223666676d75c33de21e1c4
SHA512

1a8aa9db0fdf3231c5c7ebe90f951793501e845af2d09d3efbe179c44d253acbea543a4be42cc4506ba578f53bd42e0ee172eb13b89ee8996ce2a1f82887e96a
SSDEEP

1536:i5nkFGMOtEvwDpjNbwQEI8UtzNcO8AcVL:okFDOtEvwDpjPq

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023347-13.dat	CryptoLocker_rule2
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4664-58-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4664-58-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023347-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4664-58-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress

Checks computer location settings 2 TTPs 2 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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
4664	misid.exe

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 3248 wrote to memory of 4664	3248	2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe	94
PID 3248 wrote to memory of 4664	3248	2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe	94
PID 3248 wrote to memory of 4664	3248	2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_3aa1981c8647e9525eb027143193831d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3248
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4664

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=4068 --field-trial-handle=2280,i,8281149332300504990,9122875031903898779,262144 --variations-seed-version /prefetch:8
1⤵
PID:656

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

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Downloads

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

Filesize
88KB

MD5
e8a09c3e864cff85e6895a1a72b37028

SHA1
bff1265ebc786fbfaed7aaa9ce24d0137c1df4b3

SHA256
0995141b3f897eaecd9283797ad966fb8d2867d20db10940b93c2182cb0bfd1f

SHA512
675640d44e455d3a2ae7d0a7f50bb335cf458ef0d39efc2302d37b435fecadd2b36abfbb264a8b8c3c6796dfdec79cd1af8a27c40f40c5a70f3403f7e7c5d7e6

Download Submit
memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3248-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3248-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3248-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4664-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4664-23-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4664-58-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download