djvu | 83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc

General

Target

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
Size

787KB
MD5

5b46aefda82f08b2bd5748107097b629
SHA1

41edb075dc4afe2ecfbdbe14f77f3d38bbf2eda1
SHA256

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc
SHA512

dba798a76425e59ad54a5a4585836ff50b299941c8bb6e85767518f0d396acb54b849110cddce2b54ec0efd99399cacf09b473c5fad502cd935a69cdf3e74437
SSDEEP

24576:o9uyfopPOGTgM3t0xO+2CfTbqPvEmifU/KsIv:afoZOGNjiXqPvEhsSsE

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3932-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2204-2-0x0000000005E70000-0x0000000005F8B000-memory.dmp	family_djvu
behavioral2/memory/3932-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3932-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3932-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3932-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2176-39-0x0000000000400000-0x0000000000537000-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
4696	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\653d98c2-89ff-429c-9765-6aa77fd0d7e3\\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe\" --AutoStart"	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.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
1	api.2ip.ua
2	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2204 set thread context of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 1804 set thread context of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86

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
3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
2176	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
2176	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 2204 wrote to memory of 3932	2204	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	79
PID 3932 wrote to memory of 4696	3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	81
PID 3932 wrote to memory of 4696	3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	81
PID 3932 wrote to memory of 4696	3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	81
PID 3932 wrote to memory of 1804	3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	82
PID 3932 wrote to memory of 1804	3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	82
PID 3932 wrote to memory of 1804	3932	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	82
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86
PID 1804 wrote to memory of 2176	1804	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	86

C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
"C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
  "C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3932
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\653d98c2-89ff-429c-9765-6aa77fd0d7e3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4696
- - C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
    "C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1804
  - - C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
      "C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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
1faa26ae52cac819bc42e2ee6f6ef61f

SHA1
4a06963e3a50439e0a23dd8977e7856a1c3ae579

SHA256
bdf3acc2946bbc6cd65df5af28acb5f5155d13fe2d2f889a479c2039413c2c3b

SHA512
fb7551568671c946a3882b9435955624b01fc14fccf80c3d2554582d478aa613d9ec07b86e7f2b4f250933d5eb805bdf3c57239bc26ff854e3f243381e33a04c

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
56ec83e1ffa14b7cb0d3550a555b38d4

SHA1
42fa0f5287ca6eb2c1c0419b01e1787b8e4b48bf

SHA256
96011b994b266dd0a023f7101a1aa521d4bedb88f77db18ba8c8cd3a9cfc91ff

SHA512
81babff56784058e41a966a76678bd720b95993d3e7af309f6d050beb87fbd2d7519c94566689b0ecb5485230b78c4b7abc126e0324a42edd79699e97b36429d

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

Filesize
392B

MD5
028946ebdb2d0a808c8eacc3302a0f7e

SHA1
c75f22574dcd5b6782212d40ecea31bc4204516a

SHA256
857e170795fe9977765adf12594f747479c681b5c922eddd0477cbbee02555a5

SHA512
99e7a928e6b52302674f5fb6a573962f46db8043f3646dcc6384303232c36781f78df7ca550a383ae7696ee59a2b08688fad9e95020a9391e6bdbcaebfe8c5c1

Download Submit
C:\Users\Admin\AppData\Local\653d98c2-89ff-429c-9765-6aa77fd0d7e3\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

Filesize
787KB

MD5
5b46aefda82f08b2bd5748107097b629

SHA1
41edb075dc4afe2ecfbdbe14f77f3d38bbf2eda1

SHA256
83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc

SHA512
dba798a76425e59ad54a5a4585836ff50b299941c8bb6e85767518f0d396acb54b849110cddce2b54ec0efd99399cacf09b473c5fad502cd935a69cdf3e74437

Download Submit
memory/2176-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-2-0x0000000005E70000-0x0000000005F8B000-memory.dmp

Filesize
1.1MB

Download
memory/2204-1-0x00000000042B0000-0x0000000004345000-memory.dmp

Filesize
596KB

Download
memory/3932-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3932-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3932-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3932-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3932-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads