djvu | 1918cc07f0b41a9e9dc18e715e5862a68ca49d61fdad7d76126953629c05be98

Analysis

max time kernel
78s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2022 09:11

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General

Target

28fb096cbce32cf1f87719254452014f.exe
Size

730KB
MD5

28fb096cbce32cf1f87719254452014f
SHA1

50ceaddc379e1376a579e4c9d4465fd3c734c277
SHA256

1918cc07f0b41a9e9dc18e715e5862a68ca49d61fdad7d76126953629c05be98
SHA512

eb5468f817ca4dee892eb200e920796e175298667fc86f934912c6bd304aa54d39ad4535fa12bdd0c803ac7ee164281372dc364ad97542585209fa39447b5a9f

Score

10^/10

djvu discovery persistence ransomware spyware stealer

Malware Config

Extracted

Family

djvu

http://acacaca.org/test2/get.php

Attributes

extension
.vvyu
offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/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-QsoSRIeAK6 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@bestyourmail.ch Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0531Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4888-131-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1276-134-0x0000000004380000-0x000000000449B000-memory.dmp	family_djvu
behavioral2/memory/4888-132-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4888-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4888-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4888-140-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-143-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-146-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-167-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

build2.exebuild2.exe

pid process

3684 build2.exe
1616 build2.exe

pid	process
3684	build2.exe
1616	build2.exe

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:

28fb096cbce32cf1f87719254452014f.exe28fb096cbce32cf1f87719254452014f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	28fb096cbce32cf1f87719254452014f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	28fb096cbce32cf1f87719254452014f.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

1904 icacls.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
1904	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

28fb096cbce32cf1f87719254452014f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e8ba42c9-c84f-4f7f-b749-70786d819ee7\\28fb096cbce32cf1f87719254452014f.exe\" --AutoStart"	28fb096cbce32cf1f87719254452014f.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
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

9 api.2ip.ua
10 api.2ip.ua
29 api.2ip.ua

flow	ioc
9	api.2ip.ua
10	api.2ip.ua
29	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

Processes:

28fb096cbce32cf1f87719254452014f.exe28fb096cbce32cf1f87719254452014f.exebuild2.exe

description	pid	process	target process
PID 1276 set thread context of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 set thread context of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 3684 set thread context of 1616	3684	build2.exe	build2.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

build2.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	build2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	build2.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

28fb096cbce32cf1f87719254452014f.exe28fb096cbce32cf1f87719254452014f.exebuild2.exe

pid	process
4888	28fb096cbce32cf1f87719254452014f.exe
4888	28fb096cbce32cf1f87719254452014f.exe
216	28fb096cbce32cf1f87719254452014f.exe
216	28fb096cbce32cf1f87719254452014f.exe
1616	build2.exe
1616	build2.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

28fb096cbce32cf1f87719254452014f.exe28fb096cbce32cf1f87719254452014f.exe28fb096cbce32cf1f87719254452014f.exe28fb096cbce32cf1f87719254452014f.exebuild2.exe

C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe
"C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1276

C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe
"C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4888

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\e8ba42c9-c84f-4f7f-b749-70786d819ee7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1904

C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe
"C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2512

C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe
"C:\Users\Admin\AppData\Local\Temp\28fb096cbce32cf1f87719254452014f.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:216

C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe
"C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe"
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3684

C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe
"C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe"
6⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1616

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

MD5
eba45bc75daf7421d4767f04582068ca

SHA1
e2d2b46d3780a8b7cdde6e542430f0da28684ce8

SHA256
87f79123a6048371f5e4eccca848509ff8315dea4be740c8480fe945c02b4f38

SHA512
0c081c029224806b1f1f200da673a9554e5d40756736f9ca8bc073c25703092c6d1e72a2fd971b41bedeba26e6ca9fa85486df39f852505925a49d8b94e0e330

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

MD5
4f74b1c3f52834fb5d5d0946410f286a

SHA1
e8b1734733535d236f422c282271e97b784b5261

SHA256
56b6f9f565e620e3cc377ac2265180c96efff2844f11cbb229eef977327869f1

SHA512
b84101ebe8570b2f0ecbefafcf58b941100ac6efc9cbbfc711e57bedf6cb6fc62141bd2d66c34f4b316568948ff6448c96ddef2cfde625965a9ea5968beefb2c

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

MD5
98f2fe84a4e085f1f2b3eca188dd7f49

SHA1
11016a8196afdfa7908f3dcbe8f40d0e5d6ac680

SHA256
3ae10df273120f92657cc0b9bca78ebac7cc62fcb3c96bc031443f6aa80e0f3a

SHA512
7bb198d9d7db9685ff49eb6ca573624a2806eeeefb6c1b7ccf857e7cbc4a843681895dffbf5554e3860a2f163fa57e5bfdb42ad69c1c74d8b0fb129bc7396ef7

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
396B

MD5
822f1fd3cd3a470cbe1e8d68e7c0bd7a

SHA1
f095dfd5b2e8b8ba7e64e0a5e41087a12fa67837

SHA256
a931445e07df4721a73daf452d53db43144d8ced5393225a92f0aa71fc364d19

SHA512
efbba5058bd4f3e5c684879364b8ffa7d4f58c0ba749db8c3dd7e06eecf18baca2be443c786687dc05f6771200afa15ccb2724c9023fc1a6275beca8b747c18d

Download Submit
C:\Users\Admin\AppData\Local\e8ba42c9-c84f-4f7f-b749-70786d819ee7\28fb096cbce32cf1f87719254452014f.exe
Filesize
730KB

MD5
28fb096cbce32cf1f87719254452014f

SHA1
50ceaddc379e1376a579e4c9d4465fd3c734c277

SHA256
1918cc07f0b41a9e9dc18e715e5862a68ca49d61fdad7d76126953629c05be98

SHA512
eb5468f817ca4dee892eb200e920796e175298667fc86f934912c6bd304aa54d39ad4535fa12bdd0c803ac7ee164281372dc364ad97542585209fa39447b5a9f

Download Submit
C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\fddacad6-8101-40bd-b066-49c7a321be34\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
memory/216-146-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/216-167-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/216-141-0x0000000000000000-mapping.dmp

Download
memory/216-143-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/216-145-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1276-133-0x00000000042E3000-0x0000000004375000-memory.dmp

Filesize
584KB

Download
memory/1276-134-0x0000000004380000-0x000000000449B000-memory.dmp

Filesize
1.1MB

Download
memory/1616-158-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1616-182-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1616-162-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1616-161-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1616-160-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1616-154-0x0000000000000000-mapping.dmp

Download
memory/1616-155-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1904-137-0x0000000000000000-mapping.dmp

Download
memory/2512-144-0x00000000042FF000-0x0000000004391000-memory.dmp

Filesize
584KB

Download
memory/2512-139-0x0000000000000000-mapping.dmp

Download
memory/3684-151-0x0000000000000000-mapping.dmp

Download
memory/3684-159-0x0000000001FC0000-0x0000000002006000-memory.dmp

Filesize
280KB

Download
memory/3684-157-0x000000000073D000-0x0000000000766000-memory.dmp

Filesize
164KB

Download
memory/4888-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4888-130-0x0000000000000000-mapping.dmp

Download
memory/4888-132-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4888-131-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4888-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4888-140-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 1276 wrote to memory of 4888	1276	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 4888 wrote to memory of 1904	4888	28fb096cbce32cf1f87719254452014f.exe	icacls.exe
PID 4888 wrote to memory of 1904	4888	28fb096cbce32cf1f87719254452014f.exe	icacls.exe
PID 4888 wrote to memory of 1904	4888	28fb096cbce32cf1f87719254452014f.exe	icacls.exe
PID 4888 wrote to memory of 2512	4888	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 4888 wrote to memory of 2512	4888	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 4888 wrote to memory of 2512	4888	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 2512 wrote to memory of 216	2512	28fb096cbce32cf1f87719254452014f.exe	28fb096cbce32cf1f87719254452014f.exe
PID 216 wrote to memory of 3684	216	28fb096cbce32cf1f87719254452014f.exe	build2.exe
PID 216 wrote to memory of 3684	216	28fb096cbce32cf1f87719254452014f.exe	build2.exe
PID 216 wrote to memory of 3684	216	28fb096cbce32cf1f87719254452014f.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe
PID 3684 wrote to memory of 1616	3684	build2.exe	build2.exe