djvu | 75f895c5ea6da52121cb6b32685a6fedb231dda44cb1d086442a9ea8ff78532a

Analysis

max time kernel
146s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
20-03-2023 11:44

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General

Target

setup.exe
Size

685KB
MD5

aa4a88959e7d106e6f5842595e2861f4
SHA1

14ebd62040f13496182106d2c70d7e0a88c96d9f
SHA256

75f895c5ea6da52121cb6b32685a6fedb231dda44cb1d086442a9ea8ff78532a
SHA512

e450854e8353b646c5c7c847f6d314cbda6b7804e13445baa9b87580ed338f22a59ea4962a161ca18af01eaa9884b056a8cb0c33804d0fe3579cc47e19088c0f
SSDEEP

12288:4hm6CJSZeOO3yoJwRyPl5POMPdtuK4MivrQnR7z228DaC:ibO3yoJ4yPl5mSsr0h228DaC

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.dapo
offline_id
8EM6M9LqEzIk18qaQ87WiPQ1u84RRdej5V1ovht1
payload_url
http://uaery.top/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-vbVkogQdu2 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: support@freshmail.top Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0667JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1996-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5020-136-0x0000000002190000-0x00000000022AB000-memory.dmp	family_djvu
behavioral2/memory/1996-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-146-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-151-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-152-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-157-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-158-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-159-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-163-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-165-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-166-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-167-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-168-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3908-181-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

setup.exesetup.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	setup.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	setup.exe

Executes dropped EXE 2 IoCs

Processes:

build3.exemstsca.exe

pid process

3844 build3.exe
4824 mstsca.exe
Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

264 icacls.exe

pid	process
3844	build3.exe
4824	mstsca.exe

pid	process
264	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

setup.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\554175b0-7287-4636-a2df-8b95f74b3804\\setup.exe\" --AutoStart"	setup.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

35 api.2ip.ua
21 api.2ip.ua
25 api.2ip.ua

flow	ioc
35	api.2ip.ua
21	api.2ip.ua
25	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

setup.exesetup.exe

description	pid	process	target process
PID 5020 set thread context of 1996	5020	setup.exe	setup.exe
PID 3700 set thread context of 3908	3700	setup.exe	setup.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

4188 schtasks.exe
1120 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

setup.exesetup.exe

pid process

1996 setup.exe
1996 setup.exe
3908 setup.exe
3908 setup.exe

pid	process
4188	schtasks.exe
1120	schtasks.exe

pid	process
1996	setup.exe
1996	setup.exe
3908	setup.exe
3908	setup.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

setup.exesetup.exesetup.exesetup.exebuild3.exemstsca.exe

description	pid	process	target process
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 5020 wrote to memory of 1996	5020	setup.exe	setup.exe
PID 1996 wrote to memory of 264	1996	setup.exe	icacls.exe
PID 1996 wrote to memory of 264	1996	setup.exe	icacls.exe
PID 1996 wrote to memory of 264	1996	setup.exe	icacls.exe
PID 1996 wrote to memory of 3700	1996	setup.exe	setup.exe
PID 1996 wrote to memory of 3700	1996	setup.exe	setup.exe
PID 1996 wrote to memory of 3700	1996	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3700 wrote to memory of 3908	3700	setup.exe	setup.exe
PID 3908 wrote to memory of 3844	3908	setup.exe	build3.exe
PID 3908 wrote to memory of 3844	3908	setup.exe	build3.exe
PID 3908 wrote to memory of 3844	3908	setup.exe	build3.exe
PID 3844 wrote to memory of 1120	3844	build3.exe	schtasks.exe
PID 3844 wrote to memory of 1120	3844	build3.exe	schtasks.exe
PID 3844 wrote to memory of 1120	3844	build3.exe	schtasks.exe
PID 4824 wrote to memory of 4188	4824	mstsca.exe	schtasks.exe
PID 4824 wrote to memory of 4188	4824	mstsca.exe	schtasks.exe
PID 4824 wrote to memory of 4188	4824	mstsca.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5020

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1996

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\554175b0-7287-4636-a2df-8b95f74b3804" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:264

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3700

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3908

C:\Users\Admin\AppData\Local\649886d9-8243-4a4e-912a-9ea808a2c9c0\build3.exe
"C:\Users\Admin\AppData\Local\649886d9-8243-4a4e-912a-9ea808a2c9c0\build3.exe"
5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3844

C:\Windows\SysWOW64\schtasks.exe
/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
6⤵
- Creates scheduled task(s)
PID:1120

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4824

C:\Windows\SysWOW64\schtasks.exe
/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
2⤵
- Creates scheduled task(s)
PID:4188

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

File Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize
2KB

MD5
84770e5e2da7dbc35f74f1301910fea1

SHA1
bd6156f63c93c2bc668dbd796d27474700cbff84

SHA256
97a616430f4f8b8a76004f3ffab182f6a01870267c53387960f71f56c3dae1c5

SHA512
6241fec66ad5219fa31ad47fdd93dea2ef079cfd600d3ec1ca48fe64d028d76a82984113a5052b74de8d678d183e2bafb965f3c6111f3cdf139239b07dfee941

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
1KB

MD5
46695bc8561a32e1833a6d99a77181a0

SHA1
b3c30e212f13fe612567d1a0d590ea400225bde2

SHA256
8acf929c15a9d787e72809586a1c01d53cd344207ed8f5b5d2f325f4a25f708e

SHA512
59a20f6594e628fb465ca887c4987656757d6b479c9fc72995c1bbe4c7ab89a8e60969aa68d7472b8a06bbfa99c01fdd0e87608fef95133463034bc21744e304

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize
488B

MD5
583c939d38bef9a7294fa702b337cfc6

SHA1
1efcb1dbcc8973c4600b32c8d53eb1788d68843f

SHA256
aa89e2f95e9f22485c81eb8b81f5deb3535a48465397494b3938ae2008f44a8a

SHA512
28847b21f9a6513a05750f224fc610b07a8a967ec5651a3f627f0779b4c09bdd1c80b832603015a69f81d0059fa49c3f710f188a34d5d1de407c571beb1f496c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
482B

MD5
dcfc0e19000d6ef86f9e1954bede8cc3

SHA1
2b3681687f7a5c18afab5f3b21526ca71c0b2887

SHA256
0a368bc29ba30fe96bccbf168255bc16a87978cd097f6e48377315ebd9fb9f52

SHA512
f8f51b537cd3efa185766ef6b8ac637ba090fd74c085653b9897ed6dbeb55ec1953acbfc358fe523583e252fcdf5eaae04fe4eaefa06ecec517f98d9750cd578

Download Submit
C:\Users\Admin\AppData\Local\554175b0-7287-4636-a2df-8b95f74b3804\setup.exe
Filesize
685KB

MD5
aa4a88959e7d106e6f5842595e2861f4

SHA1
14ebd62040f13496182106d2c70d7e0a88c96d9f

SHA256
75f895c5ea6da52121cb6b32685a6fedb231dda44cb1d086442a9ea8ff78532a

SHA512
e450854e8353b646c5c7c847f6d314cbda6b7804e13445baa9b87580ed338f22a59ea4962a161ca18af01eaa9884b056a8cb0c33804d0fe3579cc47e19088c0f

Download Submit
C:\Users\Admin\AppData\Local\649886d9-8243-4a4e-912a-9ea808a2c9c0\build3.exe
Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\649886d9-8243-4a4e-912a-9ea808a2c9c0\build3.exe
Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\649886d9-8243-4a4e-912a-9ea808a2c9c0\build3.exe
Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
memory/1996-147-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-134-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-146-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-159-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-163-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-165-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-166-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-167-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-168-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-152-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-181-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-158-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-157-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3908-151-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5020-136-0x0000000002190000-0x00000000022AB000-memory.dmp

Filesize
1.1MB

Download