7e826f87864a2280549e058321520f0fd96411b9e4a1e07e5c99a0a274cbb033

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2024, 19:41

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General

Target

2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe
Size

34KB
MD5

90c5e5c1886ba914b6fe140af8f6146b
SHA1

803e36241ac87b99b1ff6831ef2efd89cf7abff6
SHA256

7e826f87864a2280549e058321520f0fd96411b9e4a1e07e5c99a0a274cbb033
SHA512

68c0174c62a15e051cd2daa28892be18161075d52bcb0b7b07be98ad352141348d2240f66dd295b9d9c8b99b7bb736f75a4b94da64595f7cf99d43b694911138
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axKuiO:qUmnpomddpMOtEvwDpjjaYadT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/2224-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/224-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_set1
behavioral2/memory/2224-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/224-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/2224-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/224-26-0x0000000000500000-0x000000000050F000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
224	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/2224-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/224-26-0x0000000000500000-0x000000000050F000-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 2224 wrote to memory of 224	2224	2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe	92
PID 2224 wrote to memory of 224	2224	2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe	92
PID 2224 wrote to memory of 224	2224	2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_90c5e5c1886ba914b6fe140af8f6146b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:224

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
34KB

MD5
2d36e39b665ee242e2ebeb69110bb1ad

SHA1
32b6415f3cfdf148e967a3495424bfe9d9b225f5

SHA256
e55bff2b2b44ad7ce16d6459aeabf09454f49c510f9150a575cbc0558232b89b

SHA512
0a0b99e691d6694500bf057ba67907ee82d63e928ae4bd0f20ac6391f39b26aa2de5d3c8abaaa1234fc84172110fe58115c936b9acbe8e0a635cffb45955e0c8

Download Submit
memory/224-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/224-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/224-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2224-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2224-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2224-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2224-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2224-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download