7405830bcd9206b5ab5b27e94c36ab0a730d2f36da6744c2cb132781abffc967

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, 12:35

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General

Target

2024-02-25_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe
Size

49KB
MD5

4f928c70eb2f2605e81b468116c850b0
SHA1

c2e1a092f12fd2000301129a3594c4dee8f80d22
SHA256

7405830bcd9206b5ab5b27e94c36ab0a730d2f36da6744c2cb132781abffc967
SHA512

320f2d9351bc0472ba6eab50ede1890885172d80ba9ee60dd5164a9f772ed5417ef447f474e783115d5a99c9de5f1c57e92bc4f48e6908b3f5eabcb1718df972
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQPdUvH:BbdDmjr+OtEvwDpjMX6

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_rule2
behavioral2/memory/4064-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4064-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00c300000001e848-13.dat	UPX
behavioral2/memory/4064-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-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_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1612	asih.exe

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 4064 wrote to memory of 1612	4064	2024-02-25_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe	86
PID 4064 wrote to memory of 1612	4064	2024-02-25_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe	86
PID 4064 wrote to memory of 1612	4064	2024-02-25_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-25_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_4f928c70eb2f2605e81b468116c850b0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4064
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1612

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
49KB

MD5
eafda11cf13bd8e72ffaf0371c7498ff

SHA1
10d4a55b15928a08927856ae101f1fef376bb213

SHA256
024680708e2cfe77ce47818600bde2b02090c891367eee0b9207dc94c9669937

SHA512
9d84b9fc639af2866868b42f0881805a2123607a59557bd2ddd72e1b7c1eba9565a643bc04927bbc7c2de94adf9abed9c81b465bba89f799ac06bfcf877ffebd

Download Submit
memory/1612-19-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/1612-25-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4064-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4064-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/4064-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/4064-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4064-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download