1ae68d9d1f3eaf4f1aef26a38f4d1542cc66cd00e0853f942e0c473d9aea708e

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/04/2024, 13:52

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General

Target

2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe
Size

48KB
MD5

fb33b4c9e8f41ac608aaba6f5ae13415
SHA1

6b96bdda04b43f4d9b769ee345e042831149e620
SHA256

1ae68d9d1f3eaf4f1aef26a38f4d1542cc66cd00e0853f942e0c473d9aea708e
SHA512

b8562d130d75e77624debf191573d0d087f77a3fb820b86dad77ceffbdafbe73811dbfa89bc981a140d3b9d13af1bf6e31ea6696f81c6044dece20faaadaca80
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MobeZ:qmbhXDmjr5MOtEvwDpj5cDtKkQZQg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d00000002313f-13.dat	CryptoLocker_rule2
behavioral2/memory/4804-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3148-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3148-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4804-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3148-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3148-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d00000002313f-13.dat	UPX
behavioral2/memory/4804-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3148-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3148-27-0x0000000000500000-0x0000000000510000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3148	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 4804 wrote to memory of 3148	4804	2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe	87
PID 4804 wrote to memory of 3148	4804	2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe	87
PID 4804 wrote to memory of 3148	4804	2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_fb33b4c9e8f41ac608aaba6f5ae13415_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4804
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3148

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
48KB

MD5
def29243a06f95574a7045d3ce5fd23d

SHA1
49873d425ad1eea143ccde1586e0eedfce44fabf

SHA256
7189a293d3f95da752ac976f9d93b970d8cc78a2283aaa9a7a188277aa9fd2f7

SHA512
5e46745699dee541f6b2005ee12ca62a137dcba1d4dff05f8b5363c52e15e0668a11d0e3ed1de69f06861ee79952e00df9e7cdea6a2e9b7f666bc51bb486e52b

Download Submit
memory/3148-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3148-20-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/3148-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3148-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4804-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4804-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4804-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4804-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download