djvu | a030bbfbafcd881d49500f18a98f9942e8e1e05376cc2dcf64e9e41ee2ab7b11

Resubmissions

22-06-2024 21:38

240622-1g342svfkf 10

22-06-2024 19:48

240622-yjat6ssbph 10

Analysis

max time kernel
129s
max time network
138s
platform
windows10-1703_x64
resource
win10-20240611-en
resource tags

arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
submitted
22-06-2024 21:38

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General

Target

78E.tmp.exe
Size

466KB
MD5

246d6fa957bd9bd9bd444ba8a6c38457
SHA1

fb90a2e9e3f3d4bf350a5c8d475c843f072bc1f5
SHA256

9c17cc38feddc8aec42f4d7e84ff85260e0e5d955c38e42573a21c18836c7a59
SHA512

95e3135f417fdfd91c8e57545c246c5a0f5efc40fe1e3ef745b8283c35b156d7814934be5983dd5532b7fb789a4032a3e1d619281d0e4e1b465b86f2a036e3bb
SSDEEP

6144:agBl9KO2wSlnYlm8px3b3RY+F2q9QgW6jw5oJ48ph1nt2EuqAs00:aEKOZSlnbE3b3RiqW6jw5o6831/A

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://root.ug/Asjdhfiughdhhjbdfh45687husdfhipenelop8/Asdhuage7386/get.php

Attributes

extension
.sarut
offline_id
pQseAIqgTVhPujMMiqH1ILPNUg3soGVim0NAnkt1
payload_url
http://pool.ug/tesptc/penelop/updatewin1.exe
http://pool.ug/tesptc/penelop/updatewin2.exe
http://pool.ug/tesptc/penelop/updatewin.exe
http://pool.ug/tesptc/penelop/3.exe
http://pool.ug/tesptc/penelop/4.exe
http://pool.ug/tesptc/penelop/5.exe
ransomnote
ATTENTION! Don't worry my friend, you can return all your files! All your files like photos, 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-1aTCryfzhK 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] Our Telegram account: @datarestore Your personal ID: 078AKsudu438fyasfs

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1980-2-0x0000000000400000-0x000000000047A000-memory.dmp	family_djvu
behavioral1/memory/1980-16-0x0000000000400000-0x000000000047A000-memory.dmp	family_djvu
behavioral1/memory/1980-15-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1476-18-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1476-19-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1476-26-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1476-28-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1476-31-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1608-34-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu
behavioral1/memory/1476-322-0x0000000000400000-0x00000000004BC000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Renames multiple (142) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
Executes dropped EXE 1 IoCs

Processes:

78E.tmp.exe

pid process

1608 78E.tmp.exe
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

5100 icacls.exe

pid	process
1608	78E.tmp.exe

pid	process
5100	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

78E.tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\797ca902-f5f5-424a-a912-ef7d405fb7d8\\78E.tmp.exe\" --AutoStart"	78E.tmp.exe

Looks up external IP address via web service 4 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
10 api.2ip.ua
18 api.2ip.ua
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

78E.tmp.exe78E.tmp.exe78E.tmp.exe

pid process

1980 78E.tmp.exe
1980 78E.tmp.exe
1476 78E.tmp.exe
1476 78E.tmp.exe
1608 78E.tmp.exe
1608 78E.tmp.exe

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
10	api.2ip.ua
18	api.2ip.ua

pid	process
1980	78E.tmp.exe
1980	78E.tmp.exe
1476	78E.tmp.exe
1476	78E.tmp.exe
1608	78E.tmp.exe
1608	78E.tmp.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

78E.tmp.exe

description	pid	process	target process
PID 1980 wrote to memory of 5100	1980	78E.tmp.exe	icacls.exe
PID 1980 wrote to memory of 5100	1980	78E.tmp.exe	icacls.exe
PID 1980 wrote to memory of 5100	1980	78E.tmp.exe	icacls.exe
PID 1980 wrote to memory of 1476	1980	78E.tmp.exe	78E.tmp.exe
PID 1980 wrote to memory of 1476	1980	78E.tmp.exe	78E.tmp.exe
PID 1980 wrote to memory of 1476	1980	78E.tmp.exe	78E.tmp.exe

C:\Users\Admin\AppData\Local\Temp\78E.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\78E.tmp.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1980

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\797ca902-f5f5-424a-a912-ef7d405fb7d8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
2⤵
- Modifies file permissions
PID:5100

C:\Users\Admin\AppData\Local\Temp\78E.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\78E.tmp.exe" --Admin IsNotAutoStart IsNotTask
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:1476

C:\Users\Admin\AppData\Local\797ca902-f5f5-424a-a912-ef7d405fb7d8\78E.tmp.exe
C:\Users\Admin\AppData\Local\797ca902-f5f5-424a-a912-ef7d405fb7d8\78E.tmp.exe --Task
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1608

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize
1KB

MD5
2365869258df7a66a2121b802ca4afd9

SHA1
73acc30a2edeb9d6830de559bb8a74f35168135d

SHA256
d6b1932822bbd72a8e78c771717d992142348f67d625a42393719fefbe59b0ed

SHA512
795004bab536e128dbd81c188976d37c7b650efbfa5a80374df4c65a1049c27658f4620b7605583928eb167fcb69b4c99e4c8730c507b824a7bde9c7fb0e21f4

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Filesize
436B

MD5
1bfe0a81db078ea084ff82fe545176fe

SHA1
50b116f578bd272922fa8eae94f7b02fd3b88384

SHA256
5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f

SHA512
37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize
174B

MD5
f6fb49516e970f00008b2edb09cc5211

SHA1
08b171af9d5451200422f276a3ed8fab99de3966

SHA256
a67c97369c5da83271c8d536201581dbd9f6667781e57fa0d3d50478c28cf384

SHA512
107882371018e5755ca8d11e9528e0104f0042c8ec854ebe97ff93c1e0f2f077f0a47f019437908c60e74935827f7f96c3d75bb50eafa83823bce0c19ea7eb43

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Filesize
170B

MD5
75dd88e02d9387807cfcbd9832ac2922

SHA1
d750899b24f30fa6a6a18e164b71104c56ef791e

SHA256
b003b3926ddd14187107be92acd187b0d8c9a38a6523107e7e3f95b438d23230

SHA512
d0c256efa845990bc034a06f3619700e78090d9447b79ae32c57b0ce1ed5ec5be79a861f0f785dfcbe977baf542df6a892fc891b2053bcd1cf663e58fb54ed09

Download Submit
C:\Users\Admin\AppData\Local\797ca902-f5f5-424a-a912-ef7d405fb7d8\78E.tmp.exe
Filesize
466KB

MD5
246d6fa957bd9bd9bd444ba8a6c38457

SHA1
fb90a2e9e3f3d4bf350a5c8d475c843f072bc1f5

SHA256
9c17cc38feddc8aec42f4d7e84ff85260e0e5d955c38e42573a21c18836c7a59

SHA512
95e3135f417fdfd91c8e57545c246c5a0f5efc40fe1e3ef745b8283c35b156d7814934be5983dd5532b7fb789a4032a3e1d619281d0e4e1b465b86f2a036e3bb

Download Submit
memory/1476-28-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1476-19-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1476-18-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1476-26-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1476-31-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1476-322-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1608-34-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1980-15-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/1980-16-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1980-2-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1980-1-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download