4eb2fec9afa90fd0e2dcf044f0d0d7b9df8eac6d8b6a48c8e31bf86ff784db4c

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 03:26

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General

Target

2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe
Size

52KB
MD5

638947c6a48ee05b1c2a45265ccce8fb
SHA1

44fba1964585c8c502843fd0dec0482da743e408
SHA256

4eb2fec9afa90fd0e2dcf044f0d0d7b9df8eac6d8b6a48c8e31bf86ff784db4c
SHA512

e34e4b2d25d531558191bf4407ff0c364b3b1a230d63a469514b369ee26b5271e6a24f98952382c159b1dff2b17f16826171a7689b445eb647c9c41c4a393ba9
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOJ:bODOw9acifAoc+vu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023284-13.dat	CryptoLocker_rule2
behavioral2/memory/4688-24-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3808-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0006000000023284-13.dat	UPX
behavioral2/memory/4688-24-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3808-26-0x0000000008000000-0x000000000800F000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3808	lossy.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4688-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0006000000023284-13.dat	upx
behavioral2/memory/4688-24-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3808-26-0x0000000008000000-0x000000000800F000-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

description	pid	Process	procid_target
PID 4688 wrote to memory of 3808	4688	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	82
PID 4688 wrote to memory of 3808	4688	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	82
PID 4688 wrote to memory of 3808	4688	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4688
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3808

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\lossy.exe

Filesize
53KB

MD5
181e5d19883ea229fdd173e3bd8d9026

SHA1
45dbf1bb17a1dac42f55accf344fb3f0b8662c04

SHA256
01f6d23e951cc2458dad097da05378a5ee27aa2c0ae8c1a5ab8c242674653c69

SHA512
c3796553ce9286f38ae84e411241cf20d3c621e4caeeac517618824082a6071e844d425b9609edddcdd0837c83d310ab2ba9d066e13ef1bc244bf5839bcbf75b

Download Submit
memory/3808-18-0x0000000002030000-0x0000000002036000-memory.dmp

Filesize
24KB

Download
memory/3808-25-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3808-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4688-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4688-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4688-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4688-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4688-24-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download