ef0a0b5055d2b90a53cf34b2b60015be4fc29b2c0e114ef00a138da4a7f93702

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 04:57

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General

Target

2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe
Size

23KB
MD5

6725112704c5d2eac989fd6e7de91615
SHA1

17d81ceff555b031d1c412c20f0338738265ac40
SHA256

ef0a0b5055d2b90a53cf34b2b60015be4fc29b2c0e114ef00a138da4a7f93702
SHA512

d3b249ead3cc71c972ec164dced82b9044aeccf63c9900f019c67c523b8c0534489efb3b605217591bd50f06cf0c124f57030acf0d78fc819d411306744f6c33
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6Hjn:bVCPwFRo6CpwXFXSqQXfjA7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2188-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/2188-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2672-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2672-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2188-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x0007000000023298-13.dat	UPX
behavioral2/memory/2188-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2672-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2672-28-0x0000000008000000-0x000000000800E000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2672	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2188-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x0007000000023298-13.dat	upx
behavioral2/memory/2188-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2672-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2672-28-0x0000000008000000-0x000000000800E000-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 2188 wrote to memory of 2672	2188	2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe	83
PID 2188 wrote to memory of 2672	2188	2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe	83
PID 2188 wrote to memory of 2672	2188	2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_6725112704c5d2eac989fd6e7de91615_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2672

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\hasfj.exe

Filesize
23KB

MD5
c78520ffc1f8738eef5d743bd11bef63

SHA1
ae4ede2ff17abd4ae0309ca9dbdf5075b03ef98d

SHA256
c2341c498475631c85346c44160e3a029f9664832e3df0296773a6bb1862cefd

SHA512
66870cc7f75d957ff125b696b41d93f51cba668f653c69490cc40339f7172d2738a223965f7af47d86a47674af7d1c56c335876be1a347669da2482472ac6d85

Download Submit
memory/2188-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2188-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2188-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2188-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/2188-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2672-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2672-21-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/2672-27-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/2672-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download