djvu | 4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4

General

Target

4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe
Size

779KB
MD5

8961d67056911c6d97f9bd21a19e90fc
SHA1

4750318676b1b32add5f0391820e0b93f30b0283
SHA256

4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4
SHA512

c6bbf32beb76faab2f498d73686c97087a6ee0317b601f83fc301427a3505d3dbf4932fb96e3b6a2bf2a7a6fdd9108eae097ae871cd1604fd5fcc7aeeab7fbcc
SSDEEP

24576:2R955EUuVxR5N8wP4HBX8fhZmkCNPH4jYHrm:2RnOUO1Ud8bmkAZHS

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes

extension
.wztt
offline_id
pGPY4MKNHaEeN9pLKNW37rI0mblzUZFtPsjZ8Ht1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-E3ktviSmlG Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0768zSjfr

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/2440-2-0x00000000040D0000-0x00000000041EB000-memory.dmp	family_djvu
behavioral1/memory/4564-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4564-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4564-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4564-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4564-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3152-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3152-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3152-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4788	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3ae800b6-8e34-44f4-9316-7f90eb10879b\\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe\" --AutoStart"	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	api.2ip.ua
14	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2440 set thread context of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 3664 set thread context of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4200	3152	WerFault.exe	85

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe
4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 2440 wrote to memory of 4564	2440	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	81
PID 4564 wrote to memory of 4788	4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	82
PID 4564 wrote to memory of 4788	4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	82
PID 4564 wrote to memory of 4788	4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	82
PID 4564 wrote to memory of 3664	4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	83
PID 4564 wrote to memory of 3664	4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	83
PID 4564 wrote to memory of 3664	4564	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	83
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85
PID 3664 wrote to memory of 3152	3664	4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe	85

C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe
"C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe
  "C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4564
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3ae800b6-8e34-44f4-9316-7f90eb10879b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4788
- - C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe
    "C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3664
  - - C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe
      "C:\Users\Admin\AppData\Local\Temp\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:3152
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3152 -s 568
        5⤵
        Program crash
        
        PID:4200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3152 -ip 3152
1⤵
PID:2472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\3ae800b6-8e34-44f4-9316-7f90eb10879b\4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4.exe

Filesize
779KB

MD5
8961d67056911c6d97f9bd21a19e90fc

SHA1
4750318676b1b32add5f0391820e0b93f30b0283

SHA256
4c93d06d371a438e68954d63e7f53bbb76485dc1dbb3f0678694f91fda6471c4

SHA512
c6bbf32beb76faab2f498d73686c97087a6ee0317b601f83fc301427a3505d3dbf4932fb96e3b6a2bf2a7a6fdd9108eae097ae871cd1604fd5fcc7aeeab7fbcc

Download Submit
memory/2440-1-0x0000000004030000-0x00000000040C6000-memory.dmp

Filesize
600KB

Download
memory/2440-2-0x00000000040D0000-0x00000000041EB000-memory.dmp

Filesize
1.1MB

Download
memory/3152-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3152-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3152-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3664-20-0x0000000002590000-0x000000000262B000-memory.dmp

Filesize
620KB

Download
memory/4564-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4564-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4564-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4564-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4564-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads