1efcc9c19e08b55e7962ad3df778685e6014927e541843e20978f44d113e9fd5

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 02:54

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General

Target

2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe
Size

82KB
MD5

cd5ff9948c6df62d4cfd69e773c5740e
SHA1

7a2b839234cea6cde13f3017ba46df6851f89dfd
SHA256

1efcc9c19e08b55e7962ad3df778685e6014927e541843e20978f44d113e9fd5
SHA512

88f4737da5f228b97923737e59b8a7faaeb174036f683d6053a6cb4ac3422f04a189535612b6f2677e3dd3762e2edea126fdb88298f056eb28684bae180e703b
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT75:T6a+rdOOtEvwDpjNF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1656-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000224e9-13.dat	CryptoLocker_rule2
behavioral2/memory/1656-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3396-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1656-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000224e9-13.dat	CryptoLocker_set1
behavioral2/memory/1656-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3396-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1656-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000224e9-13.dat	UPX
behavioral2/memory/1656-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3396-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3396	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1656-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00090000000224e9-13.dat	upx
behavioral2/memory/1656-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3396-26-0x0000000000500000-0x0000000000510000-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 1656 wrote to memory of 3396	1656	2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe	87
PID 1656 wrote to memory of 3396	1656	2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe	87
PID 1656 wrote to memory of 3396	1656	2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3396

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
83KB

MD5
0809a8a886b5c467eb2fc52eb2e3afbe

SHA1
7075d30d68ffd83ec4db0b63d3032ef473c419ee

SHA256
408d9d769998b46c3de5cc4e1e12c96dcb15f8aabf6d9c35e2a9553e9e66e936

SHA512
dcd102f44c36fb48e8adf2c16b496bd976859fcf99be81a5c496f57bca1229685631f5a46102c351556471e4ae923aa38761989619835f676ecf62d485d8bcfc

Download Submit
memory/1656-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1656-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1656-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1656-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1656-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3396-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3396-24-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3396-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download