djvu | 7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890

General

Target

7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe
Size

715KB
MD5

ba99fe00ac092c630639c1b25b2a9f83
SHA1

1ca03db525bc865c70ef19e3f0219775b5a320d6
SHA256

7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890
SHA512

4172ce111e3c123dfe45dd4a3ccbf9edc72c12ad0df0a108283a23800bb9033cc647cad2b23b995f16fbc742ef5c1ac02987f5df0f8e1c5e98c122308c5acbdd
SSDEEP

12288:0Hk0jEdZy6lrbvBJZe7f2lgz/w89MVfXVbkSGuwzE8/072gmEmHeZUddE7bLf3UF:0FEdlrbFeLBz/CvVb3uzEMgmtHeZW2Gz

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.wwza
offline_id
LtYnlJvK0hICyOCeum6Tv4pbia9jcIGHVgA3Xht1
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-xoUXGr6cqT 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: 0789JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3676-1-0x00000000023B0000-0x00000000024CB000-memory.dmp	family_djvu
behavioral2/memory/968-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4996-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4996-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4996-22-0x0000000000400000-0x0000000000537000-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-1-5-21-2890696111-2332180956-3312704074-1000\Control Panel\International\Geo\Nation	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2680	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-1-5-21-2890696111-2332180956-3312704074-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\21b586be-50ee-480c-ac06-b5e8df0096bd\\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe\" --AutoStart"	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.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
11	api.2ip.ua
12	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3676 set thread context of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 2484 set thread context of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92

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
3204	4996	WerFault.exe	92

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe
968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 3676 wrote to memory of 968	3676	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	85
PID 968 wrote to memory of 2680	968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	88
PID 968 wrote to memory of 2680	968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	88
PID 968 wrote to memory of 2680	968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	88
PID 968 wrote to memory of 2484	968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	89
PID 968 wrote to memory of 2484	968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	89
PID 968 wrote to memory of 2484	968	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	89
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92
PID 2484 wrote to memory of 4996	2484	7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe	92

C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe
"C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3676
- C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe
  "C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\21b586be-50ee-480c-ac06-b5e8df0096bd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2680
- - C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe
    "C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2484
  - - C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe
      "C:\Users\Admin\AppData\Local\Temp\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4996
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4996 -s 568
        5⤵
        Program crash
        
        PID:3204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4996 -ip 4996
1⤵
PID:3304

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

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Downloads

C:\Users\Admin\AppData\Local\21b586be-50ee-480c-ac06-b5e8df0096bd\7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890.exe

Filesize
715KB

MD5
ba99fe00ac092c630639c1b25b2a9f83

SHA1
1ca03db525bc865c70ef19e3f0219775b5a320d6

SHA256
7b1e08a2e6a809a06358ac67496c1be7027a047fbcac50a100718e3eb3d53890

SHA512
4172ce111e3c123dfe45dd4a3ccbf9edc72c12ad0df0a108283a23800bb9033cc647cad2b23b995f16fbc742ef5c1ac02987f5df0f8e1c5e98c122308c5acbdd

Download Submit
memory/968-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2484-17-0x0000000002060000-0x00000000020F2000-memory.dmp

Filesize
584KB

Download
memory/3676-5-0x0000000002260000-0x00000000022F2000-memory.dmp

Filesize
584KB

Download
memory/3676-0-0x0000000002260000-0x00000000022F2000-memory.dmp

Filesize
584KB

Download
memory/3676-1-0x00000000023B0000-0x00000000024CB000-memory.dmp

Filesize
1.1MB

Download
memory/4996-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4996-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4996-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads