75e712dbc2ba181dac9af92002bcd62f32d96bb75df98d32ef9e1aa41a0a9964

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 02:34

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General

Target

2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe
Size

47KB
MD5

3d1c164eda11ddaf390d441c4225a6c4
SHA1

a0b89698f0711bebfb6dab527735f87f7e00911b
SHA256

75e712dbc2ba181dac9af92002bcd62f32d96bb75df98d32ef9e1aa41a0a9964
SHA512

f0e007529349e91c0f820c50e52178b86b1e71d5a4b670d64a6da0161ec6c0ebaa9df844b0d8652b73ff8149bab96fa6187be7055eba816e9c00ac0fc58ad55d
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo22H:qmbhXDmjr5MOtEvwDpj5cDtKkQZQJ7b

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4952-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002321b-14.dat	CryptoLocker_rule2
behavioral2/memory/3328-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3328-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4952-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3328-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3328-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4952-2-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002321b-14.dat	UPX
behavioral2/memory/3328-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3328-28-0x0000000000500000-0x0000000000510000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3328	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 4952 wrote to memory of 3328	4952	2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe	90
PID 4952 wrote to memory of 3328	4952	2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe	90
PID 4952 wrote to memory of 3328	4952	2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_3d1c164eda11ddaf390d441c4225a6c4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3328

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
47KB

MD5
5246be66427543e445926b687fd3fc93

SHA1
75d26dbf023e97abebff30b8a0f02d651814c927

SHA256
9e7aa2bad73547eb88ae8de5d476a868f57f435a78e1e04dbb8ac7ef542eb2a6

SHA512
17d7018490aa9d33da4c5e703975d3a95ccccf3a599f671efb2d8c405433624799f3d7e1e96f0ed0848309fa6d3603980e077278cc73b4035275563971e61582

Download Submit
memory/3328-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3328-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3328-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3328-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4952-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4952-2-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4952-3-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4952-4-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download