djvu | 188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735

General

Target

188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe
Size

787KB
MD5

5d21060735fa451daef340b707b32807
SHA1

5d2a34c309d1fa2b71e9380489df5b5cbcdd7a78
SHA256

188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735
SHA512

57ea1f39692fbf86afb8dffe0f4e57dadbc046e5792f3a3203b490d09949ea0c5ae27d49afa16e530306fdc84d1110226450e7eba34ea7bcf8330561c6c99ad0
SSDEEP

12288:vx4mzYpZz2Nez2uSph3XQySocIwMnKRQ7i2HQdFrE0rvfGWZp46GzuJjOD6ILFy:vnz/42DrqoRwMGDP1r3a6GzujQFZy

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test2/get.php

Attributes

extension
.rzfu
offline_id
4OGfweO4lKfNTwKczrTWD8yTxQkyAGofoZhcOKt1
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-RX6ODkr7XJ 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: 0775AUSdjl

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 6 IoCs

resource	yara_rule
behavioral2/memory/4896-1-0x00000000028D0000-0x00000000029EB000-memory.dmp	family_djvu
behavioral2/memory/3908-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-17-0x0000000000400000-0x0000000000537000-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-1-5-21-2848203831-2014322062-3611574811-1000\Control Panel\International\Geo\Nation	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1692	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-1-5-21-2848203831-2014322062-3611574811-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8ff58b8e-de94-42c7-91b6-faf8186867f6\\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe\" --AutoStart"	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.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
26	api.2ip.ua
27	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4896 set thread context of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe
3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 4896 wrote to memory of 3908	4896	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	86
PID 3908 wrote to memory of 1692	3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	87
PID 3908 wrote to memory of 1692	3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	87
PID 3908 wrote to memory of 1692	3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	87
PID 3908 wrote to memory of 2920	3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	88
PID 3908 wrote to memory of 2920	3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	88
PID 3908 wrote to memory of 2920	3908	188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe	88

C:\Users\Admin\AppData\Local\Temp\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe
"C:\Users\Admin\AppData\Local\Temp\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Users\Admin\AppData\Local\Temp\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3908
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8ff58b8e-de94-42c7-91b6-faf8186867f6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1692
- - C:\Users\Admin\AppData\Local\Temp\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    PID:2920

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\8ff58b8e-de94-42c7-91b6-faf8186867f6\188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735_JC.exe

Filesize
787KB

MD5
5d21060735fa451daef340b707b32807

SHA1
5d2a34c309d1fa2b71e9380489df5b5cbcdd7a78

SHA256
188c586ed738a6e28416cf49bb17d5a66ac19f767e095b959ca84ef900d22735

SHA512
57ea1f39692fbf86afb8dffe0f4e57dadbc046e5792f3a3203b490d09949ea0c5ae27d49afa16e530306fdc84d1110226450e7eba34ea7bcf8330561c6c99ad0

Download Submit
memory/3908-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4896-0-0x0000000004270000-0x0000000004302000-memory.dmp

Filesize
584KB

Download
memory/4896-1-0x00000000028D0000-0x00000000029EB000-memory.dmp

Filesize
1.1MB

Download
memory/4896-4-0x0000000004270000-0x0000000004302000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads