djvu | 245247efeee2675a380f791323dd3b2b52eeddc0c1c033b7772c03a8c699b4e2

Analysis

max time kernel
144s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
24/03/2023, 00:50

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

setup.exe
Size

759KB
MD5

53b4b7a52ff4187f3c5b66644ed5d413
SHA1

ef288a4672d79662a9dfb531cfba49aedd8d8c3c
SHA256

245247efeee2675a380f791323dd3b2b52eeddc0c1c033b7772c03a8c699b4e2
SHA512

a26571e2331572578f66a7c924ec7873d611e354bdc6d2b88edb19609793788d1ff0d612a7f716120658827e23563cad09551a39ac1119bd95d10d35ab2a5a2e
SSDEEP

12288:6bb/OyO/RDWGjbb+ULhiTq1bNr3tfgU4p4U34kVFoa5Di85Qg0Vp:KghVV3t4UqVoOFRTcp

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.tywd
offline_id
Yao2o6f5vNghOpgVBhEIA8O96SC5vLcgITgaRMt1
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-f8UEvx4T0A 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: 0671IsjO

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/1684-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1684-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-136-0x0000000000AC0000-0x0000000000BDB000-memory.dmp	family_djvu
behavioral2/memory/1684-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1684-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1684-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-151-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-152-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-157-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-158-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-159-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-163-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-165-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-166-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-167-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-168-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-177-0x0000000000400000-0x0000000000537000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	setup.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	setup.exe

Executes dropped EXE 2 IoCs

pid	Process
5040	build3.exe
5080	mstsca.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
5000	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\017bcb4d-731d-49f8-a814-57e96eb6a8a0\\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.

flow	ioc
19	api.2ip.ua
22	api.2ip.ua
35	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2180 set thread context of 1684	2180	setup.exe	86
PID 2344 set thread context of 1648	2344	setup.exe	90

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

pid	Process
1588	schtasks.exe
1608	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1684	setup.exe
1684	setup.exe
1648	setup.exe
1648	setup.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 2180 wrote to memory of 1684	2180	setup.exe	86
PID 1684 wrote to memory of 5000	1684	setup.exe	87
PID 1684 wrote to memory of 5000	1684	setup.exe	87
PID 1684 wrote to memory of 5000	1684	setup.exe	87
PID 1684 wrote to memory of 2344	1684	setup.exe	88
PID 1684 wrote to memory of 2344	1684	setup.exe	88
PID 1684 wrote to memory of 2344	1684	setup.exe	88
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 2344 wrote to memory of 1648	2344	setup.exe	90
PID 1648 wrote to memory of 5040	1648	setup.exe	97
PID 1648 wrote to memory of 5040	1648	setup.exe	97
PID 1648 wrote to memory of 5040	1648	setup.exe	97
PID 5040 wrote to memory of 1588	5040	build3.exe	98
PID 5040 wrote to memory of 1588	5040	build3.exe	98
PID 5040 wrote to memory of 1588	5040	build3.exe	98
PID 5080 wrote to memory of 1608	5080	mstsca.exe	108
PID 5080 wrote to memory of 1608	5080	mstsca.exe	108
PID 5080 wrote to memory of 1608	5080	mstsca.exe	108

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:2180
- 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:1684
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\017bcb4d-731d-49f8-a814-57e96eb6a8a0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5000
- - 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:2344
  - - 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:1648
    - - C:\Users\Admin\AppData\Local\7efff7c8-70c2-40bd-8b36-d79dc28b2250\build3.exe
        
        "C:\Users\Admin\AppData\Local\7efff7c8-70c2-40bd-8b36-d79dc28b2250\build3.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:5040
      - 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:1588

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:5080
- 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:1608

Network

MITRE ATT&CK Enterprise 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 and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
2KB

MD5
ebf38835fd83d603ed2939112fe923d2

SHA1
27426896cf1aac5c41eff28eae202b44d92345f9

SHA256
1b703c5ef0e6349372108f3a7a2033a365e50a17e8d7cd278f93e4444f232b71

SHA512
7d4d060f679ba65f601e5e7d9bee51bec4bd801bb3440a5c1f856cfa643ccca152a670e38d1e458d419e5f41ee422d5f37029035e58c2e8e9ec9e0339c680a0d

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

Filesize
1KB

MD5
e23d8cd61c2e75283867a91ce42aa1dc

SHA1
a86f54bb4f00cf0fcd3efc3951d54e168d25c7f4

SHA256
0a8b65baa91fb423458dd64e067a6009cd4ce9a93c65ac4b448025403ab0ea9c

SHA512
89483da80407e373d6d0f18b4ddd3976a5cd8e590b398de51e881623f54e4c146ec57def18c26c8f7ca5e7ed00b51b9a94d14ad38d2d716b416507b41144c5f4

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

Filesize
488B

MD5
d533198bf140bba0e58d5d8b2bafed4b

SHA1
5a1af7bb0e3050e13397fb20a898eb5b20ab6145

SHA256
f87e58255cd3921bf7150beaba55a42f180c22b01754e44289dd8017a527f2b4

SHA512
f2f846d55ea5179a5f98d99dc8b1d2937e6372b9db358c0eaf029979c20509c356673d7843d2e4ca0c1fe161c839ea29d6ff6bd68892b84ba738d00f1e8dab3f

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

Filesize
482B

MD5
b972473d5724fe84fbadf8cac9821150

SHA1
ba69fafca95980fbe6ed42deed93614fb8d45869

SHA256
61917f17ed47f3c9b0370206932e00b6b4c6d825c1022b95fbb21ee24e2d8dcf

SHA512
f7d9376b1c3a508bdc954280b1cef730ac771f173bb75f3c4dd79cdcb2417487aa9536c3697c36edc2cc7800e421a035700883fbc3a5011b561ebd6023920539

Download Submit
C:\Users\Admin\AppData\Local\017bcb4d-731d-49f8-a814-57e96eb6a8a0\setup.exe

Filesize
759KB

MD5
53b4b7a52ff4187f3c5b66644ed5d413

SHA1
ef288a4672d79662a9dfb531cfba49aedd8d8c3c

SHA256
245247efeee2675a380f791323dd3b2b52eeddc0c1c033b7772c03a8c699b4e2

SHA512
a26571e2331572578f66a7c924ec7873d611e354bdc6d2b88edb19609793788d1ff0d612a7f716120658827e23563cad09551a39ac1119bd95d10d35ab2a5a2e

Download Submit
C:\Users\Admin\AppData\Local\7efff7c8-70c2-40bd-8b36-d79dc28b2250\build3.exe

Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\7efff7c8-70c2-40bd-8b36-d79dc28b2250\build3.exe

Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\7efff7c8-70c2-40bd-8b36-d79dc28b2250\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/1648-166-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-167-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-151-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-157-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-158-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-159-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-163-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-165-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-177-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-152-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-168-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-147-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-134-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-136-0x0000000000AC0000-0x0000000000BDB000-memory.dmp

Filesize
1.1MB

Download