djvu | b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5

Analysis

max time kernel
146s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
06/03/2024, 07:41

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General

Target

b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
Size

732KB
MD5

ca106182fc4543131ef128b77f57c70a
SHA1

26d5069dfabecd28077365ecdb2704a621527c96
SHA256

b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5
SHA512

04f911af74389114301acc580e6041f6350df4eceb1ad6dc6034bef75d388581391c37d83847adc61a8b83e9b68b72f17e2d1f2b4a185bc7efd2b03d92daba4f
SSDEEP

12288:2L2LS6hjiwI975M/yK2YdeY0M2DbnRsN82298kZaZvmaifZSKANOx+D:2L2xn/yXNY0M0Vl6v1wZkNO0

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://habrafa.com/test1/get.php

Attributes

extension
.cdpo
offline_id
Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1
payload_url
http://brusuax.com/dl/build2.exe

http://habrafa.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-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: 0844OSkw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/1912-4-0x0000000001E10000-0x0000000001F2B000-memory.dmp	family_djvu
behavioral1/memory/1628-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1628-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1628-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1628-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-59-0x0000000000400000-0x0000000000537000-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
2696	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-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e6a4b376-0654-4a42-94f8-bd0e285464b6\\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe\" --AutoStart"	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1912 set thread context of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 2664 set thread context of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
2584	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
2584	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1912 wrote to memory of 1628	1912	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	28
PID 1628 wrote to memory of 2696	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	30
PID 1628 wrote to memory of 2696	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	30
PID 1628 wrote to memory of 2696	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	30
PID 1628 wrote to memory of 2696	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	30
PID 1628 wrote to memory of 2664	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	31
PID 1628 wrote to memory of 2664	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	31
PID 1628 wrote to memory of 2664	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	31
PID 1628 wrote to memory of 2664	1628	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	31
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32
PID 2664 wrote to memory of 2584	2664	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	32

C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
"C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
  "C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1628
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e6a4b376-0654-4a42-94f8-bd0e285464b6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2696
- - C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
    "C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2664
  - - C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
      "C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2584

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

Loading Replay Monitor...

Downloads

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

Filesize
1KB

MD5
5c443b68792005ef031354bed4067e3f

SHA1
354688e202e4551e30c61892d39960af2b3fec67

SHA256
00146606f8500163a204f076d273b4d4d80082660aedbbd4525f3775c29d1011

SHA512
b7ccecd08318b1c2965da6a6e013a44b7d879dbb2fd13a61b47fb6da155a5580a4d17f6e5c91a97f367de157d7d863f35df47a8cb258cef570a4decfd8980de5

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
508a354390bc1b26fb308827c6bb9721

SHA1
bb0f14eb8acb609265016bf1f5846197853f431e

SHA256
91e12760d4afb18ef842d8565ea3002a2817b7fad22fbf2e075a1052c3a915ef

SHA512
10d881c2fab2152d26b40c58eb55e8ee52729a01afae72cfdf1028502905f8a4e48a2ee1aae317a68cbef0b595907d535296f17dcd8213c9afc18683b5b69955

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

Filesize
344B

MD5
921a3a3935c274970f3aa2ca75835282

SHA1
ad8e3dd0a10c6219d4221dd3d7bf365e2f399a07

SHA256
3fff7fde8df656e02ba8dcdfe7f8e0f2db85be6ba7660d7b0890fef61ddbf2d2

SHA512
041d53ad1b51b032b486a5da93ec5f4c76da460eb918ac97911ce91a659455de645aa3b29f3871fe56fe656ab2a0080b0f86d00aef5078f755fa5f1bda5fd483

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

Filesize
392B

MD5
b9675afec98132aa8043e0669f5c510e

SHA1
6117a44950883ed2bbb1f7d94cb5babc227a5d6c

SHA256
1c7a63489601c2aa298c01a919bc09d12bad5bfd327c77b33a48e05f4a8d066c

SHA512
37096a7bf8508ca66df92b1d6a65ec547b0661d25eb3a12c6f47a61d9d8465ba65bc8d995c56c5d8c925590dd38d725984fbe9e41318eada5221710458c8f965

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab2858.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\e6a4b376-0654-4a42-94f8-bd0e285464b6\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe

Filesize
732KB

MD5
ca106182fc4543131ef128b77f57c70a

SHA1
26d5069dfabecd28077365ecdb2704a621527c96

SHA256
b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5

SHA512
04f911af74389114301acc580e6041f6350df4eceb1ad6dc6034bef75d388581391c37d83847adc61a8b83e9b68b72f17e2d1f2b4a185bc7efd2b03d92daba4f

Download Submit
memory/1628-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1628-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1628-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1628-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1628-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1912-2-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/1912-4-0x0000000001E10000-0x0000000001F2B000-memory.dmp

Filesize
1.1MB

Download
memory/1912-0-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2584-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2664-33-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2664-28-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2664-53-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download