bc1e67f5bca931ddc70f31ff6b0ec1c04a9bef7b130420c5b6a312601e3c58c1

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 03:41

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General

Target

2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe
Size

56KB
MD5

ea97635677cd2ea929a87be6b17599a9
SHA1

ae7e41f403b2c0a9f281ce61969a6d5300f56ef3
SHA256

bc1e67f5bca931ddc70f31ff6b0ec1c04a9bef7b130420c5b6a312601e3c58c1
SHA512

b70a182d29750f6cc90622483122dbf2a53865ca8d5c7e0bc44f2a30f8064a26babc056286b2f9b2f3118b2a1d848b7cec3f8cc38cb1a49ed3fce1a3e6379093
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61Z:BbdDmjr+OtEvwDpjMv

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3172-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023226-13.dat	CryptoLocker_rule2
behavioral2/memory/3172-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3528-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3172-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3528-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3172-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023226-13.dat	UPX
behavioral2/memory/3172-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3528-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3528	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 3172 wrote to memory of 3528	3172	2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe	88
PID 3172 wrote to memory of 3528	3172	2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe	88
PID 3172 wrote to memory of 3528	3172	2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_ea97635677cd2ea929a87be6b17599a9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3528

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
56KB

MD5
52118f263aa31a83e83a6129eaab2bc3

SHA1
a272738c6bb57af866ce926432e8f5c72254f721

SHA256
23bef32baa0185426f5871975a00ddf62b856d888d67bdef7a3577c31274b2d4

SHA512
13ee0dda5c161684b38bedbb17a5e5402fb949baa05a3c2d6d97e26aabc3bae890e57b05df42f9dbe9e2c66befdbb8b7d3d714dca5fdc4ba54ffb851ad4ff701

Download Submit
memory/3172-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3172-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3172-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3172-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3172-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3528-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3528-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3528-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download