djvu | 7bc2928ce06e7db7bfe0bf3f2c2d2ff9df7f0a8041ea8c593dd0b912c1c3d3fd

Resubmissions

08/03/2025, 20:10

250308-yxnces1zcw10

24/01/2025, 03:37

250124-d6f99aypbq10

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24/01/2025, 03:37

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General

Target
starticon3.exe
Size 725KB
Sample250124-d6f99aypbq
SHA256 7bc2928ce06e7db7bfe0bf3f2c2d2ff9df7f0a8041ea8c593dd0b912c1c3d3fd
MD5 e8bbb6d921b79101aea7d906a1798f3d
SHA1 4fd59822cdedd1b194d27d2c01a9cde6222de1bb
SHA512 c525e07c65c7be43aa90568f98253b397919cd0f597b1ba446fed51a578ca1aae4c93fa59e1345b20e3216a676ba35c89c67d6ced6bea68da44a53989fa4d656
SSDEEP 12288:O7q+wuEST6sxwGCwuwn5vE2nyrJppqrNSP9kdrzA9PpXtuRt2BoivOnJztu3vdyB:CqrFvGjF5iZqrQag1t7+nJztuHi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://ring1.ug/As73yhsyU34578hxxx/SDf565g/get.php

Attributes

extension
.coot
offline_id
MRQ5kb5Z12tWuP3e25YoRt4PRDrJd2yuI3coott1
payload_url
http://ring1.ug/files/cost/updatewin1.exe

http://ring1.ug/files/cost/updatewin2.exe

http://ring1.ug/files/cost/updatewin.exe

http://ring1.ug/files/cost/3.exe

http://ring1.ug/files/cost/4.exe

http://ring1.ug/files/cost/5.exe
ransomnote
ATTENTION! Don't worry, 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-IbdGyCKhdr 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] Your personal ID: 0175Asd374y5iuhld

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/4296-2-0x0000000006E20000-0x0000000006F3A000-memory.dmp	family_djvu
behavioral2/memory/4296-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-15-0x0000000006E20000-0x0000000006F3A000-memory.dmp	family_djvu
behavioral2/memory/4296-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-14-0x0000000000400000-0x0000000004F0E000-memory.dmp	family_djvu
behavioral2/memory/2948-22-0x0000000000400000-0x0000000004F0E000-memory.dmp	family_djvu
behavioral2/memory/2948-25-0x0000000000400000-0x0000000004F0E000-memory.dmp	family_djvu
behavioral2/memory/2948-28-0x0000000000400000-0x0000000004F0E000-memory.dmp	family_djvu
behavioral2/memory/2948-29-0x0000000000400000-0x0000000004F0E000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	starticon3.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4676	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bd521f99-ca33-4266-80d4-5898414369c1\\starticon3.exe\" --AutoStart"	starticon3.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
20	api.2ip.ua
21	api.2ip.ua
38	api.2ip.ua

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3488	4296	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	starticon3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	starticon3.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4296	starticon3.exe
4296	starticon3.exe
2948	starticon3.exe
2948	starticon3.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4296 wrote to memory of 4676	4296	starticon3.exe	95
PID 4296 wrote to memory of 4676	4296	starticon3.exe	95
PID 4296 wrote to memory of 4676	4296	starticon3.exe	95
PID 4296 wrote to memory of 2948	4296	starticon3.exe	96
PID 4296 wrote to memory of 2948	4296	starticon3.exe	96
PID 4296 wrote to memory of 2948	4296	starticon3.exe	96

C:\Users\Admin\AppData\Local\Temp\starticon3.exe
"C:\Users\Admin\AppData\Local\Temp\starticon3.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\bd521f99-ca33-4266-80d4-5898414369c1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:4676
- C:\Users\Admin\AppData\Local\Temp\starticon3.exe
  "C:\Users\Admin\AppData\Local\Temp\starticon3.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4296 -s 2092
  2⤵
  - Program crash
  PID:3488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4296 -ip 4296
1⤵
PID:1072

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4
MD5 c9be626e9715952e9b70f92f912b9787
SHA1 aa2e946d9ad9027172d0d321917942b7562d6abe
SHA512 7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Size 436B
SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
MD5 971c514f84bba0785f80aa1c23edfd79
SHA1 732acea710a87530c6b08ecdf32a110d254a54c8
SHA512 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58
MD5 SHA1 SHA512

Submit Download

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 39ab32f4fa539d05b187a23946a0c6b184539175c0dbf3aa12e69cda0d89252c
MD5 dcc9d705b3898b400d4dbacd982164a4
SHA1 fff3a3b93e8e395ef034e2042f0dc27ccc638bdc
SHA512 d6cbad0d5e687ffcf6382d5ff5367c82b5389acc1f4095c083a86954cdf7f58472190e940bf1290a26c5cc9802e47413995035b840238a77dacd14ed0a9afd3e
MD5 SHA1 SHA512

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B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 4bffd75ae94b7e9804f5d976224359d24e0ceca302bf5f901fd1b5580322df8b
MD5 5bf6644146cd4aea1997937fd95f3ce1
SHA1 afc6a82ac4e05606d10815c3f4e0351eda0c5b17
SHA512 53cb1b834a331cdbdd187fe2d96a50b3a3a95278273a0f44c3ddd9d45ed6e58daa0a54f5a8642ae6a70bf4587c3e26f4e44d76eac7df43a9242af772f80101ce
MD5 SHA1 SHA512

Submit Download

starticon3.exe

Path C:\Users\Admin\AppData\Local\bd521f99-ca33-4266-80d4-5898414369c1\starticon3.exe
Size 725KB
SHA256 7bc2928ce06e7db7bfe0bf3f2c2d2ff9df7f0a8041ea8c593dd0b912c1c3d3fd
MD5 e8bbb6d921b79101aea7d906a1798f3d
SHA1 4fd59822cdedd1b194d27d2c01a9cde6222de1bb
SHA512 c525e07c65c7be43aa90568f98253b397919cd0f597b1ba446fed51a578ca1aae4c93fa59e1345b20e3216a676ba35c89c67d6ced6bea68da44a53989fa4d656
SSDEEP 12288:O7q+wuEST6sxwGCwuwn5vE2nyrJppqrNSP9kdrzA9PpXtuRt2BoivOnJztu3vdyB:CqrFvGjF5iZqrQag1t7+nJztuHi
MD5 SHA1 SHA512 SSDEEP

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memory/2948-22-0x0000000000400000-0x0000000004F0E000-memory.dmp

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memory/2948-25-0x0000000000400000-0x0000000004F0E000-memory.dmp

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memory/2948-28-0x0000000000400000-0x0000000004F0E000-memory.dmp

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memory/2948-29-0x0000000000400000-0x0000000004F0E000-memory.dmp

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memory/4296-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-14-0x0000000000400000-0x0000000004F0E000-memory.dmp

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memory/4296-15-0x0000000006E20000-0x0000000006F3A000-memory.dmp

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memory/4296-1-0x0000000006C60000-0x0000000006CF8000-memory.dmp

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memory/4296-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-2-0x0000000006E20000-0x0000000006F3A000-memory.dmp

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