f9d31268804d8209515656e6ab145b4dfadb9eb893b618b81e093294e205a781

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24/02/2024, 14:31

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General

Target

2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe
Size

81KB
MD5

400ef00308cd4c15f00a1b22c54fac18
SHA1

328f394e86cf47c93d019eb1487e6d464b4dcdd0
SHA256

f9d31268804d8209515656e6ab145b4dfadb9eb893b618b81e093294e205a781
SHA512

7b8e39c6844e92d70c1117ff5a51535b7b8e59405528c1e83f310bab2d875f260f8b4aa91c6ff881babb37ef68a8c3e6481fc97a2286d11278fc8eb3708d8cc3
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWZ4:T6a+rdOOtEvwDpjNt1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5004-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_rule2
behavioral2/memory/5004-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2976-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5004-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_set1
behavioral2/memory/5004-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2976-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5004-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00c300000001e848-13.dat	UPX
behavioral2/memory/5004-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2976-25-0x0000000000500000-0x0000000000510000-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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2976	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5004-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00c300000001e848-13.dat	upx
behavioral2/memory/5004-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2976-25-0x0000000000500000-0x0000000000510000-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 5004 wrote to memory of 2976	5004	2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe	87
PID 5004 wrote to memory of 2976	5004	2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe	87
PID 5004 wrote to memory of 2976	5004	2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_400ef00308cd4c15f00a1b22c54fac18_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2976

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
82KB

MD5
1e38772ea653dc7944ecdc6491a6b7a8

SHA1
4bd5a7061d401afa9c34648076e5b0a4daf5e2a6

SHA256
f0730cd54c26a3149c64bf876ca97eaebad57b354642242b383c39b3acdc494b

SHA512
9e9e41361649c300ecd3c17415b743479872d63defddaa66fb676d06a01525563cb6a5b6e55e1c6afdbc5f03470ec2dd996e43cc75ba13a6a1391f483fefbf97

Download Submit
memory/2976-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5004-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5004-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5004-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5004-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5004-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download