djvu | c9b54d5f8b3a9b1da0c9765305c3487351a8ac8f2c8683284ea632910e92e132

Analysis

max time kernel
146s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
10/01/2024, 13:32

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General

Target

file.exe
Size

784KB
MD5

e6f92be7f819410f58178b2a32c02ece
SHA1

b019e06385f601bd88ff71a43ed274a8f46a354c
SHA256

c9b54d5f8b3a9b1da0c9765305c3487351a8ac8f2c8683284ea632910e92e132
SHA512

e06a7457d0ba3a24e83595674df30655ad1d8880980cb6f2df5b80d46a7fbece1ee08e5d74208e5e40e93852742e163f400db1ebecf13e94b2085c1b182e5c74
SSDEEP

24576:3ISrb5ModOgj6b2D/qjyAxOw4klV0b3CMX1IG:xtMAj9XcFWx1

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdtt
offline_id
Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1
payload_url
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-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0845OSkw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2492-2-0x00000000004D0000-0x00000000005EB000-memory.dmp	family_djvu
behavioral1/memory/1636-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1996-61-0x0000000000400000-0x0000000000537000-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

pid	Process
2636	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3d5486ce-b0ff-4eb5-afe8-b978f03ce0e7\\file.exe\" --AutoStart"	file.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.

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
6	api.2ip.ua
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2492 set thread context of 1636	2492	file.exe	28
PID 1988 set thread context of 1996	1988	file.exe	32

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1636	file.exe
1996	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 2492 wrote to memory of 1636	2492	file.exe	28
PID 1636 wrote to memory of 2636	1636	file.exe	30
PID 1636 wrote to memory of 2636	1636	file.exe	30
PID 1636 wrote to memory of 2636	1636	file.exe	30
PID 1636 wrote to memory of 2636	1636	file.exe	30
PID 1636 wrote to memory of 1988	1636	file.exe	31
PID 1636 wrote to memory of 1988	1636	file.exe	31
PID 1636 wrote to memory of 1988	1636	file.exe	31
PID 1636 wrote to memory of 1988	1636	file.exe	31
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32
PID 1988 wrote to memory of 1996	1988	file.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3d5486ce-b0ff-4eb5-afe8-b978f03ce0e7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2636
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1988
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
a388ee301b8710e2fd8f371ce4e929bc

SHA1
c9f7f3d9b310ead35f6b1a710e55c6ef4df06c25

SHA256
6a1af7fdf7b33b1fd0a042c2e23451886a051cc7fb3a25270600422ffd8bbba1

SHA512
9a8172d67d8becf06ca71a2e9e8cff12efde9da4f9c694f40c3f18d078378fd3a03453c078c75ca443e5a369087b143d9cef870744821a4ee3f3ad1d4ec10151

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
833db79c46ed18f253f0cf62ba659ec0

SHA1
f17d1e497e9d71b0ae0e6be4ca11a0260a822f95

SHA256
7d053625ae76951d1f08291f43681cc15b3fce06c93effc901721de34805121b

SHA512
32e7dac2862b028a8e3437ccf9e293922c810b44e74053245ec694f37b17d3112bf00da7a87c56c62eeafafd486cbd61ebd17755733db7bac88b2ea4073c768f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
d20a92ec0498aa2cc2b4e8c9b990baa9

SHA1
ab1f8cfb5b1813c0bd4c469c40a518fb182cebeb

SHA256
8b1c3697e85f4415d0b438dc8e22dcdef700f9f68c100e8cf2683bfe90c9519b

SHA512
e36e1c3f4e87de2e6d90c443a0d20bc3ef21b12650fb1c03ce5d6a177a2f988eba2fb184b1e7b6a60c51ade6ecfc58439fb31890ffe536eba0a48fd571d5c0ad

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

Filesize
392B

MD5
69d46aed562da863d8fe721a42641e3f

SHA1
95ae2ac6387a94b3b44b523a9c09a5ba03d89f72

SHA256
8f71284082e2407607d07bc1ec9751715de515b8bc74fc7e1ef45113617a9f35

SHA512
c5f922101176ccff815114f7b2da2a35a1aeb7fb0763e62b85322a8b10e98a94d12db151ac6560de6d3b4d2ad912da0a6391ae88600e88c8b6b6b889986ea6c0

Download Submit
C:\Users\Admin\AppData\Local\3d5486ce-b0ff-4eb5-afe8-b978f03ce0e7\file.exe

Filesize
784KB

MD5
e6f92be7f819410f58178b2a32c02ece

SHA1
b019e06385f601bd88ff71a43ed274a8f46a354c

SHA256
c9b54d5f8b3a9b1da0c9765305c3487351a8ac8f2c8683284ea632910e92e132

SHA512
e06a7457d0ba3a24e83595674df30655ad1d8880980cb6f2df5b80d46a7fbece1ee08e5d74208e5e40e93852742e163f400db1ebecf13e94b2085c1b182e5c74

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab6C79.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
memory/1636-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1636-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-30-0x00000000004D0000-0x0000000000561000-memory.dmp

Filesize
580KB

Download
memory/1988-31-0x00000000004D0000-0x0000000000561000-memory.dmp

Filesize
580KB

Download
memory/1996-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1996-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2492-0-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/2492-2-0x00000000004D0000-0x00000000005EB000-memory.dmp

Filesize
1.1MB

Download
memory/2492-1-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download