djvu | 6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571

General

Target

6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
Size

716KB
MD5

45e29541b72d9b115a74d1fed6354afb
SHA1

92dcda655abeaa19d042116bdcc5ba58151ee640
SHA256

6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571
SHA512

299aa6ac2fdc35cc8a1a655af27558cfa13a4e5018a8c8d390b6ca024821fd93ee5ac64fed5f8b9ff28b1649203f552b6868c5131ee5970d1e3cb883e7a5a0cb
SSDEEP

12288:EL5gGXNQfNc/deHhygHrS0kv00iKHauiDsPmyr20xLpgb8BN3pt9iaFNVRa:ELTGKQpS0kvygaucsPmyr2whddXja

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2564-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp	family_djvu
behavioral2/memory/4548-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4548-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4548-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4548-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4548-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3952-37-0x0000000000400000-0x0000000000537000-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

Processes:

icacls.exe

pid process

4020 icacls.exe

pid	process
4020	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\21dcda93-b5c2-4053-96b1-86618b965246\\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe\" --AutoStart"	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.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.

Processes:

flow ioc

1 api.2ip.ua
2 api.2ip.ua
7 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

description	pid	process	target process
PID 2564 set thread context of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 set thread context of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

pid	process
4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
3952	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
3952	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
"C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2564

C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
"C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4548

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\21dcda93-b5c2-4053-96b1-86618b965246" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4020

C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
"C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2012

C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
"C:\Users\Admin\AppData\Local\Temp\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3952

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
6f6e3fca3096a0e7e7eb59d51f4a5350

SHA1
c978fa12d9045c593d5e7e097037ee465e09c3b2

SHA256
d27a9ba9c11dbd9c2b2bcb61a4128f457e7d15a3db20fad170588821e4003d78

SHA512
c45004cb6359a32eb55f1f2ff762ab948d79991ec890ceaf988d513ff9cd4dc0168deb2235b391b43ca8d69d960ba302fde0ed13a2b0e1dddbd63135f27cb546

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
868aacdbf8f07a24f3b1f3b22aaab10c

SHA1
b6a2a87faa820527d668eaab16eab6ee21ee84f9

SHA256
411e4d3c3e25dc803d07daa580ffb1e7b84751e02b20e81a1acc43d739c91a11

SHA512
092ffe867c1c13132327c18ab695609a049124dae09d6bf7880ffa20e48a6a98fcb7ec8d85d99a7f25133dbcde20d57e5a055d8a6d708891f5b7550c40f81b83

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
3abaa0e8b33605973f9a3e593dc1bc9b

SHA1
588d834b995fa37a53fd99e551efc38b7c184f3a

SHA256
1b8f2f1e9afa82d470f86155ff82c665cfb7a56baddffea0c42f9b525d807d25

SHA512
287764192d1c444d42f78b24bc0c0c0a84bacfaa4f7a484fa108d7da8d82fdc3434675c64f1f7f2d3b6e3d08a23d3cbd82cbe27431b8e9034c5d31ba77f45c07

Download Submit
C:\Users\Admin\AppData\Local\21dcda93-b5c2-4053-96b1-86618b965246\6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
Filesize
716KB

MD5
45e29541b72d9b115a74d1fed6354afb

SHA1
92dcda655abeaa19d042116bdcc5ba58151ee640

SHA256
6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571

SHA512
299aa6ac2fdc35cc8a1a655af27558cfa13a4e5018a8c8d390b6ca024821fd93ee5ac64fed5f8b9ff28b1649203f552b6868c5131ee5970d1e3cb883e7a5a0cb

Download Submit
memory/2564-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

Filesize
1.1MB

Download
memory/2564-1-0x0000000004A20000-0x0000000004AC2000-memory.dmp

Filesize
648KB

Download
memory/3952-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4548-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4548-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4548-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4548-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4548-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2564 wrote to memory of 4548	2564	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 4548 wrote to memory of 4020	4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	icacls.exe
PID 4548 wrote to memory of 4020	4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	icacls.exe
PID 4548 wrote to memory of 4020	4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	icacls.exe
PID 4548 wrote to memory of 2012	4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 4548 wrote to memory of 2012	4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 4548 wrote to memory of 2012	4548	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe
PID 2012 wrote to memory of 3952	2012	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe	6b6ef23a0bbdbde7bfedbf7aa0b3a66c31dd406282eb96d6c3dd1d6a3a95b571.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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