d86743332bb087565a4f743e4eea4c2ec48bf5169c9bfd0e553785f0d2ec9777

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 06:03

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General

Target

2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe
Size

23KB
MD5

da0a14f18ecc3890a67c8ba65f8b0c67
SHA1

2627efc53f73f59658bde998459444fa6d80a06a
SHA256

d86743332bb087565a4f743e4eea4c2ec48bf5169c9bfd0e553785f0d2ec9777
SHA512

644f57f322c1198532123ebdc552f459a3416fb7fb1f40f7c62133e305b9e79b86296b94d42bcf4ac68b8a5d82110b53c398e8864f51b74e42da15cf4e78e2ae
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6Hje:bVCPwFRo6CpwXFXSqQXfjAK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1592-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b3e-13.dat	CryptoLocker_rule2
behavioral2/memory/1592-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1904-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1904-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1592-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000c000000023b3e-13.dat	UPX
behavioral2/memory/1592-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/1904-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/1904-28-0x0000000008000000-0x000000000800E000-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1904	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1592-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000c000000023b3e-13.dat	upx
behavioral2/memory/1592-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/1904-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/1904-28-0x0000000008000000-0x000000000800E000-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 1592 wrote to memory of 1904	1592	2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe	83
PID 1592 wrote to memory of 1904	1592	2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe	83
PID 1592 wrote to memory of 1904	1592	2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_da0a14f18ecc3890a67c8ba65f8b0c67_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1904

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\hasfj.exe

Filesize
23KB

MD5
6719eaef29bd04681337bcdc91505285

SHA1
b8eaec32561e1f80dbac3de9c02ae8c846f5e520

SHA256
4c0b6f94e8640463f27d7d22cb064375f60948dc0a55746c42401d9f50ac5e8b

SHA512
4a5ab613a5d25b304d0fc91048105a57f69576b0d56a3dfc8e13abc313d426f19b2d33021284251e5f3f132e4e364cfaae1086fb63cbf879300f0950f409f3ee

Download Submit
memory/1592-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1592-1-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/1592-2-0x0000000002400000-0x0000000002406000-memory.dmp

Filesize
24KB

Download
memory/1592-9-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/1592-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1904-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1904-21-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/1904-27-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1904-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download