8b46e9f8dc1b5a496872ecd11111deb231d679199a93b77a4216c77dbd9109c7

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 19:26

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General

Target

2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe
Size

48KB
MD5

73235027bc2d1a35c9d84e0cb4226eb7
SHA1

3302174a1efb8f2fa89ecc3b46b94c6d0fc9caf2
SHA256

8b46e9f8dc1b5a496872ecd11111deb231d679199a93b77a4216c77dbd9109c7
SHA512

4803cf7c6a6a44da19aba133efde57fb14ff3eb2633a78f839d98acfe91492f981a7a671a5400163fdf050ce7c5f0642dbcd35fb05406e865456a63cd8c4b46f
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoA9:qmbhXDmjr5MOtEvwDpj5cDtKkQZQs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023289-13.dat	CryptoLocker_rule2
behavioral2/memory/1496-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3512-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3512-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1496-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3512-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3512-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023289-13.dat	UPX
behavioral2/memory/1496-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3512-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3512-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3512	asih.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 1496 wrote to memory of 3512	1496	2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe	80
PID 1496 wrote to memory of 3512	1496	2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe	80
PID 1496 wrote to memory of 3512	1496	2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_73235027bc2d1a35c9d84e0cb4226eb7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3512

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
48KB

MD5
c48276dc1220be9b47e5a14b63e8385e

SHA1
09461aaabd0ec22b1376569b42f8eb124f3d11ef

SHA256
7bc43f48eff15628117b4beeb5d9b06099ff3535ba4e1ecec23a1971bc81574c

SHA512
de5d769136fd79202c9a2a2b40785f50818d9b1ec735e1ae5662da5ddef5bfabbdc4052e0e4b5bbab3a40236dd760aecb9decfa607f0f998916f50612587daf6

Download Submit
memory/1496-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1496-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1496-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1496-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1496-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3512-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3512-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3512-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3512-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download