34ef0e22c2418e90a16c3e0fbd73d978ec3c27e2563fd9b6f953b3c1a13fcdf4

Analysis

max time kernel
132s
max time network
153s
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, 10:34

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General

Target

2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe
Size

78KB
MD5

5b1952fa40ba7aa71bd5b757b7912841
SHA1

7903cee7db6ce33d95f95e77d154eb0ccdd032bd
SHA256

34ef0e22c2418e90a16c3e0fbd73d978ec3c27e2563fd9b6f953b3c1a13fcdf4
SHA512

fd39d11e628a0ddf4af6aba07cd14da332d0350ad5490cd179b01b89c6d2395f2b716da6c27cb920785e234262864b48d8801d25d64529e6fadff27e1fc677e6
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qu:zCsanOtEvwDpji

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/3184-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4304-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3184-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_set1
behavioral2/memory/3184-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4304-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3184-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/3184-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4304-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3184-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3184	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/3184-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4304-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3184-27-0x0000000000500000-0x0000000000510000-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 4304 wrote to memory of 3184	4304	2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe	89
PID 4304 wrote to memory of 3184	4304	2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe	89
PID 4304 wrote to memory of 3184	4304	2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3184

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
78KB

MD5
5d49d735e946d175ebf5af94165866d1

SHA1
537be63cfe103928cce8bb3df09829118e76daaa

SHA256
d0956c337a7dfc6c70d5fe38a998697184912de71aa41863d43c28f4bc64c926

SHA512
0cf4aa5069bcc7ef1d1b029e8ad6dea228c2c78a11b53a6734ab1e354ed3d58c4a84338bf4d34bb0445e035c105a086ccb23db87a97116ae0af6be31026106e7

Download Submit
memory/3184-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3184-22-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3184-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3184-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4304-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4304-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4304-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4304-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4304-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download