e7474e3e79203b934be89c983c4a744c6cf371f2fd181d30bb9bc18135e318b8

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25-02-2024 06:34

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General

Target

2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe
Size

83KB
MD5

93c7ba2752c7ecf81395e494ea3661a4
SHA1

bfcacb448ef1348ad9eb876f2fc4db9839b7ff97
SHA256

e7474e3e79203b934be89c983c4a744c6cf371f2fd181d30bb9bc18135e318b8
SHA512

d3e701d8e5c7cd1b0e23c2df5b7e83339536a5a4bb7cd6d0b18ab1f50060d938f97f128c9919c9958c8cc191477abea32ac1329b446545da5f5ceb393688d3a8
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1nW:zCsanOtEvwDpjQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_rule2
behavioral2/memory/4084-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_set1
behavioral2/memory/4084-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00c300000001e848-13.dat	UPX
behavioral2/memory/4084-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4760	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00c300000001e848-13.dat	upx
behavioral2/memory/4084-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-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 4084 wrote to memory of 4760	4084	2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe	88
PID 4084 wrote to memory of 4760	4084	2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe	88
PID 4084 wrote to memory of 4760	4084	2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_93c7ba2752c7ecf81395e494ea3661a4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4084
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4760

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\misid.exe

Filesize
83KB

MD5
e3799fe5139a4e4ac3707f170c5bdd76

SHA1
da6360c7871ba1f981a275a9130c1a7c2069ac86

SHA256
6916fc9f15b9ed6cb1a80678f4fc350d219f179f8cd2fd84cc288bd8a2db0cc0

SHA512
8b4585561ddd6a1dd6ec36cda2bdcc102198d71d0f18e81aa2460c04a458bb07bb1ab39797ce140f9251a6071e28fe976b71824ab5487deb4c3bf0204c97a6a9

Download Submit
memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4084-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4084-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4084-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4084-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4760-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4760-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download