djvu | 6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c

General

Target

6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe
Size

765KB
MD5

90c1665850554543a8474f5d23678fe8
SHA1

b1beabd7836d777cc5b5c765da52ab2302fea4b9
SHA256

6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c
SHA512

694e38791a7ced7afa8f0795f70e74d655020762b338857dbb1cb10a8b972284e33db7ede1bf5fb555dcf323263545b0da5d5c5df3b4154c34d8ada838069c3e
SSDEEP

12288:tIX5F8XAm/bnG+5YuLiTfAW+0DnAgqeBiAwioHSMIKxiLoJ3KTkkP:ts8PCpCijAW+MAgqeBiARoxZykk

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.yzoo
offline_id
x2zqmFxw8ydx3wkiEeNayQ64Eyg2U5MS31sTegt1
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://go.wetransfer.com/t-Z4jZBpJ1EK 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: 0820ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/3888-2-0x0000000002550000-0x000000000266B000-memory.dmp	family_djvu
behavioral1/memory/2264-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2264-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2264-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2264-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2264-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2344-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2344-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2344-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

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-1-5-21-1114462139-3090196418-29517368-1000\Control Panel\International\Geo\Nation	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4076	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-1-5-21-1114462139-3090196418-29517368-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5cde16cf-c62c-4c05-80af-17c5f5007e3f\\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe\" --AutoStart"	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.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
22	api.2ip.ua
23	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3888 set thread context of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 2320 set thread context of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99

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
464	2344	WerFault.exe	99

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe
2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 3888 wrote to memory of 2264	3888	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	89
PID 2264 wrote to memory of 4076	2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	90
PID 2264 wrote to memory of 4076	2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	90
PID 2264 wrote to memory of 4076	2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	90
PID 2264 wrote to memory of 2320	2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	93
PID 2264 wrote to memory of 2320	2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	93
PID 2264 wrote to memory of 2320	2264	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	93
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99
PID 2320 wrote to memory of 2344	2320	6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe	99

C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe
"C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3888
- C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe
  "C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5cde16cf-c62c-4c05-80af-17c5f5007e3f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4076
- - C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe
    "C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2320
  - - C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe
      "C:\Users\Admin\AppData\Local\Temp\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:2344
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2344 -s 572
        5⤵
        Program crash
        
        PID:464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2344 -ip 2344
1⤵
PID:4988

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\5cde16cf-c62c-4c05-80af-17c5f5007e3f\6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c.exe

Filesize
765KB

MD5
90c1665850554543a8474f5d23678fe8

SHA1
b1beabd7836d777cc5b5c765da52ab2302fea4b9

SHA256
6b58cc8a2e1e3de20f9451d6c479867b73abe225e1f375099e6d2a6d31197a2c

SHA512
694e38791a7ced7afa8f0795f70e74d655020762b338857dbb1cb10a8b972284e33db7ede1bf5fb555dcf323263545b0da5d5c5df3b4154c34d8ada838069c3e

Download Submit
memory/2264-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2264-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2264-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2264-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2264-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2320-21-0x00000000024E0000-0x0000000002580000-memory.dmp

Filesize
640KB

Download
memory/2344-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2344-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2344-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3888-1-0x0000000002460000-0x00000000024F4000-memory.dmp

Filesize
592KB

Download
memory/3888-2-0x0000000002550000-0x000000000266B000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads