8daeb16f1f5b66c7833efcce07d18caf3101e4b10541547bf05f850e26c7cf70

Analysis

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

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 21:22

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General

Target

2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe
Size

77KB
MD5

056904c9a5ff44551b1f3a88a539eb76
SHA1

110cf2ab3d91f1148742a85240f58562752ccd1c
SHA256

8daeb16f1f5b66c7833efcce07d18caf3101e4b10541547bf05f850e26c7cf70
SHA512

bfec34de7e1b864a5a66da4058d33514b13cffaa0a01862bf98878aaa9379412f42f410ea2564f824049b83f9432ea9b8d52cbda08d1500f5ca187399b17e6d2
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcR1:T6a+rdOOtEvwDpjNtA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3228-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023b74-13.dat	CryptoLocker_rule2
behavioral2/memory/3228-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1968-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3228-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e000000023b74-13.dat	CryptoLocker_set1
behavioral2/memory/3228-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1968-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3228-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000e000000023b74-13.dat	UPX
behavioral2/memory/3228-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1968-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1968	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3228-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000e000000023b74-13.dat	upx
behavioral2/memory/3228-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1968-26-0x0000000000500000-0x0000000000510000-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 3228 wrote to memory of 1968	3228	2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe	85
PID 3228 wrote to memory of 1968	3228	2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe	85
PID 3228 wrote to memory of 1968	3228	2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_056904c9a5ff44551b1f3a88a539eb76_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3228
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1968

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
77KB

MD5
52caba9c8569bdd7a96c1e3ff36329e2

SHA1
cc34321c0ee2faae532b2f159f42aac6a887b159

SHA256
bc5f6926fc57834a2c17a3ca3b49472c85cf34ffa4297d10ed644617e543b451

SHA512
0ac9f6633b328561fe6cf3b28f093eaf7c048e744c44890b8141916e049986d4c1a5d2e54cfdf06f3b0a5811fb2172249bd52c0912b3d9cb143281390998c64d

Download Submit
memory/1968-19-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/1968-25-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1968-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3228-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3228-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3228-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3228-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3228-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download