f7165a29854c9e3d0392c4c4d11e0a230caf11f5e87e1b2ca8a3bfbc5cb85550

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06/06/2024, 15:01

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General

Target

2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe
Size

51KB
MD5

e51c6de523354066189d9e48a4c0af9a
SHA1

ca6d7b38e41abc29876aecbcf033caef5f464fae
SHA256

f7165a29854c9e3d0392c4c4d11e0a230caf11f5e87e1b2ca8a3bfbc5cb85550
SHA512

ff52d4047ab4bbae0edf893e34d1c04780135bd16db0757c901ecf8021b5013972584a7f27f8dfd1bb8c8aa78ac9d504867fbc2b0e38a7554e2d2ee110ad22f0
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoccU:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/736-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023276-13.dat	CryptoLocker_rule2
behavioral2/memory/736-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4708-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/736-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4708-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/736-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023276-13.dat	UPX
behavioral2/memory/736-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4708-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4708	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 736 wrote to memory of 4708	736	2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe	82
PID 736 wrote to memory of 4708	736	2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe	82
PID 736 wrote to memory of 4708	736	2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-06_e51c6de523354066189d9e48a4c0af9a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:736
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4708

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
51KB

MD5
66f74f9c3e6f9d3af8defe30472ab5b7

SHA1
2d25c874beab4b20982d29d5ed35dcc25721bf38

SHA256
03f02cdcd97a8e21eea5c409151ca964bc03d5cf3ba2a9b6c2ba406eca4e453e

SHA512
832c7a9a5be2a2f8c40eb9a3622ce20d204498160172854dd6ca1c25f7fcb7d2b6817729a59a4db74efa5cbe004dfb7a911c203ef2640c5e050919bd15c1f36b

Download Submit
memory/736-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/736-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/736-2-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/736-9-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/736-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4708-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4708-25-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4708-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download