djvu | 9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c

General

Target

9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
Size

688KB
MD5

cd2a2421b83821c6c98e6d0bd346d7bd
SHA1

0723c84c1e70a010e60b623526d146a469a69420
SHA256

9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c
SHA512

f054710a96054db19b87511431b0868ceb824f94b8fd5e74a24298013c08d056b5bdeb56b4bc2baad3f4f343bea2bde82fe9a3de2a5698778edfcccf7f97c58f
SSDEEP

12288:DFaV1oBGxcJ7Mj8G25d970Ecg3zgb5pzisLx+uGwE9EzX7:8VWBxC8rJ3zgbesLxrPyE

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes

extension
.cdqw
offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
payload_url
http://brusuax.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-99MNqXMrdS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0840ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 11 IoCs

resource	yara_rule
behavioral2/memory/4836-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-2-0x0000000002630000-0x000000000274B000-memory.dmp	family_djvu
behavioral2/memory/4852-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4852-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4852-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4852-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4852-29-0x0000000000400000-0x0000000000537000-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
3384	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-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\262df0c7-f49f-494a-b971-24983915d7e7\\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe\" --AutoStart"	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
36	api.2ip.ua
4	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2420 set thread context of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4656	4920	WerFault.exe	104

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4836	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
4836	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 2420 wrote to memory of 4836	2420	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	20
PID 4836 wrote to memory of 3384	4836	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	97
PID 4836 wrote to memory of 3384	4836	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	97
PID 4836 wrote to memory of 3384	4836	9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe	97

C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
"C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
  "C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4836
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\262df0c7-f49f-494a-b971-24983915d7e7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3384
- - C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
    "C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    PID:5052

C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
"C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe" --Admin IsNotAutoStart IsNotTask
1⤵
PID:4852
- C:\Users\Admin\AppData\Local\b3285208-ece0-4902-8879-8e95d514990e\build2.exe
  "C:\Users\Admin\AppData\Local\b3285208-ece0-4902-8879-8e95d514990e\build2.exe"
  2⤵
  PID:2028

C:\Users\Admin\AppData\Local\b3285208-ece0-4902-8879-8e95d514990e\build2.exe
"C:\Users\Admin\AppData\Local\b3285208-ece0-4902-8879-8e95d514990e\build2.exe"
1⤵
PID:4920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4920 -s 2092
  2⤵
  - Program crash
  PID:4656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4920 -ip 4920
1⤵
PID:4208

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2028-43-0x00000000005F0000-0x00000000006F0000-memory.dmp

Filesize
1024KB

Download
memory/2028-46-0x00000000006F0000-0x000000000073B000-memory.dmp

Filesize
300KB

Download
memory/2420-2-0x0000000002630000-0x000000000274B000-memory.dmp

Filesize
1.1MB

Download
memory/2420-1-0x0000000000A30000-0x0000000000AC3000-memory.dmp

Filesize
588KB

Download
memory/4836-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4836-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4836-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4836-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4836-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4852-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4920-52-0x0000000000400000-0x000000000065E000-memory.dmp

Filesize
2.4MB

Download
memory/4920-42-0x0000000000400000-0x000000000065E000-memory.dmp

Filesize
2.4MB

Download
memory/4920-47-0x0000000000400000-0x000000000065E000-memory.dmp

Filesize
2.4MB

Download
memory/4920-48-0x0000000000400000-0x000000000065E000-memory.dmp

Filesize
2.4MB

Download
memory/5052-20-0x00000000023D0000-0x0000000002465000-memory.dmp

Filesize
596KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads