28d18eccd29d9580fad15f5742844e1d35b09c3c216970235eda6de9363db00a

Analysis

max time kernel
149s
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
14/03/2024, 15:48

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General

Target

2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe
Size

71KB
MD5

b11b02950798ac6c306962238f4beab9
SHA1

886ce1299b6319c7135344f70b548319d236a2cd
SHA256

28d18eccd29d9580fad15f5742844e1d35b09c3c216970235eda6de9363db00a
SHA512

19dd3dd62aaa54825e8677307ccbbf3d6bf890c9b7e3930da579fc4938c6a3be694a1d601a633006810014c521919eabfbb2b702233531191eb81b3824cb4ea3
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalV5:1nK6a+qdOOtEvwDpju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_rule2
behavioral2/memory/1076-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2960-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_set1
behavioral2/memory/1076-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2960-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000022745-13.dat	UPX
behavioral2/memory/1076-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2960-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2960	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000022745-13.dat	upx
behavioral2/memory/1076-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2960-26-0x0000000000500000-0x000000000050F311-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 1076 wrote to memory of 2960	1076	2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe	90
PID 1076 wrote to memory of 2960	1076	2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe	90
PID 1076 wrote to memory of 2960	1076	2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_b11b02950798ac6c306962238f4beab9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1076
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2960

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
72KB

MD5
684d7d2b99b670f4df36890a3b1eb9ae

SHA1
6eefac688f86edb31ddf5b52d3c588c4e149cdef

SHA256
079897bb957ca493510c29d83095ab16fcff81d9254a0428814eb81166f1500c

SHA512
51f8bc09d7318fcf28dbcdbf010cfc5cbad9a052d34881ad563ba20a86cf00d13496584dad3e1e89b412310adcae62a13e2cab1a74bae6f60e2f75fedf1bbab8

Download Submit
memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1076-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1076-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1076-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1076-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2960-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2960-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2960-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download