a39d89fd5ff332c1d626c2d0d8fc1a4036bf945155892aaddca96d0afa6b6d33

Analysis

max time kernel
150s
max time network
151s
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 22:44

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General

Target

2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe
Size

23KB
MD5

e01659b7e99243756a520e9c59e16351
SHA1

27a3d5f3d40dcf1f44a44e6069d7cdf402103a2d
SHA256

a39d89fd5ff332c1d626c2d0d8fc1a4036bf945155892aaddca96d0afa6b6d33
SHA512

7ddbd2c860c6613c7d1b5e10a1d2cf0628bf0881c69b346152974ffec372029c73a72147c37834ed73854b965af104e4979d9bf88ebfab9ad799ae26a8a77d1c
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6Hnmz:bVCPwFRo6CpwXFXSqQXfjAHmz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5036-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/3596-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5036-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3596-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5036-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/3596-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/5036-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3596-27-0x0000000008000000-0x000000000800E000-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

Processes:

2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

3596 hasfj.exe

pid	process
3596	hasfj.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5036-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/3596-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/5036-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3596-27-0x0000000008000000-0x000000000800E000-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

Processes:

2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe

description	pid	process	target process
PID 5036 wrote to memory of 3596	5036	2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe	hasfj.exe
PID 5036 wrote to memory of 3596	5036	2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe	hasfj.exe
PID 5036 wrote to memory of 3596	5036	2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_e01659b7e99243756a520e9c59e16351_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5036

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:3596

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
9121640dd473f675d4ef6ec48912d5e4

SHA1
bd2558fa98e7b7d979d8fa7081f0189d1ce73e7f

SHA256
699f3835654decbebfec801d47c2b7534b64223f6e68cf2e6c114268796c52fd

SHA512
c2a5b1a665e361bc195d68462b9db37268093acea065591847ae0e934cdc7385cd5bdaeabf74b6c3f46c75cbea6d7ef39b02ff40e85eb7530794bbf2f083a8a8

Download Submit
memory/3596-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3596-26-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3596-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/5036-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/5036-1-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/5036-2-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/5036-9-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/5036-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download