djvu | 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0

General

Target

18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
Size

744KB
MD5

e8a6862182b58ef511dd4df313ec615f
SHA1

4eda4c23199853a52b75d371661a16295893538e
SHA256

18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0
SHA512

0b86cf445c39b5c192affa6b5de4fa72db640f35450b5096f5c16dfa5f6c7c5ab6c705db6cc6f195f563ce73b65339c2889640956ae04d9b314e7e606435e5f4
SSDEEP

12288:JCwQ/y/heWvm5JJXhaHC+/5Kht0JGqudDafejZrvXYC0j91Hjjpd3y:J1b/heWvmRhaHDRKz0JjsDnpI7jNFy

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.ppvs
offline_id
phJtdHo970vyx7vwlYG00OakDR75RuJz7NXDArt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/4052-2-0x0000000002790000-0x00000000028AB000-memory.dmp	family_djvu
behavioral1/memory/5084-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5084-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5084-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5084-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5084-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1700-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1700-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1700-23-0x0000000000400000-0x0000000000537000-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-1-5-21-1873812795-1433807462-1429862679-1000\Control Panel\International\Geo\Nation	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4204	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-1-5-21-1873812795-1433807462-1429862679-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b\\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe\" --AutoStart"	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.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
36	api.2ip.ua
37	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4052 set thread context of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4444 set thread context of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100

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
3696	1700	WerFault.exe	100

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 4052 wrote to memory of 5084	4052	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	89
PID 5084 wrote to memory of 4204	5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	96
PID 5084 wrote to memory of 4204	5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	96
PID 5084 wrote to memory of 4204	5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	96
PID 5084 wrote to memory of 4444	5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	97
PID 5084 wrote to memory of 4444	5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	97
PID 5084 wrote to memory of 4444	5084	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	97
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100
PID 4444 wrote to memory of 1700	4444	18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe	100

C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
"C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4052
- C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
  "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4204
- - C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
    "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4444
  - - C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
      "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:1700
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1700 -s 216
        5⤵
        Program crash
        
        PID:3696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1700 -ip 1700
1⤵
PID:3080

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\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe

Filesize
744KB

MD5
e8a6862182b58ef511dd4df313ec615f

SHA1
4eda4c23199853a52b75d371661a16295893538e

SHA256
18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0

SHA512
0b86cf445c39b5c192affa6b5de4fa72db640f35450b5096f5c16dfa5f6c7c5ab6c705db6cc6f195f563ce73b65339c2889640956ae04d9b314e7e606435e5f4

Download Submit
memory/1700-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1700-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1700-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4052-1-0x0000000002600000-0x0000000002697000-memory.dmp

Filesize
604KB

Download
memory/4052-2-0x0000000002790000-0x00000000028AB000-memory.dmp

Filesize
1.1MB

Download
memory/4444-18-0x0000000002420000-0x00000000024BC000-memory.dmp

Filesize
624KB

Download
memory/5084-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5084-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5084-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5084-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5084-15-0x0000000000400000-0x0000000000537000-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