djvu | f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd

General

Target

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
Size

683KB
MD5

22e0f02888c452e5a90aa375e0475987
SHA1

884d2ea4fa6659ac1e09572100502409a0eaf748
SHA256

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd
SHA512

7845232099215d8dd670d5219f6967e5caf34678f86c32865fe8d03551ea84575f882738a7edec5b35d75d0d5207e9e32140431572ff9f622ab2a1384dc70046

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://vizk1.ug/As73yhsyU34578hxxx1/SDf565g/get.php

Attributes

extension
.repp
offline_id
j4mSCzF3yhC0DJadRCZ4LxftIh8CY8isHUYeuYt1
payload_url
http://vizk1.ug/files/cost/updatewin1.exe

http://vizk1.ug/files/cost/updatewin2.exe

http://vizk1.ug/files/cost/updatewin.exe

http://vizk1.ug/files/cost/3.exe

http://vizk1.ug/files/cost/4.exe

http://vizk1.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-glN3dXaDLr 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: 0203asdoeoOOdf

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4640-131-0x0000000005530000-0x000000000564A000-memory.dmp	family_djvu
behavioral2/memory/4640-132-0x0000000000400000-0x0000000003752000-memory.dmp	family_djvu
behavioral2/memory/1284-142-0x0000000005450000-0x000000000556A000-memory.dmp	family_djvu

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

Processes:

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4312 icacls.exe

pid	process
4312	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b3725838-913e-4992-a4b8-ede58859ce9d\\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe\" --AutoStart"	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.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.

Processes:

flow ioc

36 api.2ip.ua
4 api.2ip.ua
5 api.2ip.ua
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

flow	ioc
36	api.2ip.ua
4	api.2ip.ua
5	api.2ip.ua

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 5c0000000100000004000000000800000f00000001000000140000003e8e6487f8fd27d322a269a71edaac5d57811286090000000100000054000000305206082b0601050507030206082b06010505070303060a2b0601040182370a030406082b0601050507030406082b0601050507030606082b0601050507030706082b0601050507030106082b0601050507030853000000010000004300000030413022060c2b06010401b231010201050130123010060a2b0601040182373c0101030200c0301b060567810c010330123010060a2b0601040182373c0101030200c0620000000100000020000000d7a7a0fb5d7e2731d771e9484ebcdef71d5f0c3e0a2948782bc83ee0ea699ef40b000000010000001c0000005300650063007400690067006f002000280041004100410029000000140000000100000014000000a0110a233e96f107ece2af29ef82a57fd030a4b41d00000001000000100000002e0d6875874a44c820912e85e964cfdb030000000100000014000000d1eb23a46d17d68fd92564c2f1f1601764d8e3491900000001000000100000002aa1c05e2ae606f198c2c5e937c97aa2200000000100000036040000308204323082031aa003020102020101300d06092a864886f70d0101050500307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c18414141204365727469666963617465205365727669636573301e170d3034303130313030303030305a170d3238313233313233353935395a307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c1841414120436572746966696361746520536572766963657330820122300d06092a864886f70d01010105000382010f003082010a0282010100be409df46ee1ea76871c4d45448ebe46c883069dc12afe181f8ee402faf3ab5d508a16310b9a06d0c57022cd492d5463ccb66e68460b53eacb4c24c0bc724eeaf115aef4549a120ac37ab23360e2da8955f32258f3dedccfef8386a28c944f9f68f29890468427c776bfe3cc352c8b5e07646582c048b0a891f9619f762050a891c766b5eb78620356f08a1a13ea31a31ea099fd38f6f62732586f07f56bb8fb142bafb7aaccd6635f738cda0599a838a8cb17783651ace99ef4783a8dcf0fd942e2980cab2f9f0e01deef9f9949f12ddfac744d1b98b547c5e529d1f99018c7629cbe83c7267b3e8a25c7c0dd9de6356810209d8fd8ded2c3849c0d5ee82fc90203010001a381c03081bd301d0603551d0e04160414a0110a233e96f107ece2af29ef82a57fd030a4b4300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff307b0603551d1f047430723038a036a0348632687474703a2f2f63726c2e636f6d6f646f63612e636f6d2f414141436572746966696361746553657276696365732e63726c3036a034a0328630687474703a2f2f63726c2e636f6d6f646f2e6e65742f414141436572746966696361746553657276696365732e63726c300d06092a864886f70d010105050003820101000856fc02f09be8ffa4fad67bc64480ce4fc4c5f60058cca6b6bc1449680476e8e6ee5dec020f60d68d50184f264e01e3e6b0a5eebfbc745441bffdfc12b8c74f5af48960057f60b7054af3f6f1c2bfc4b97486b62d7d6bccd2f346dd2fc6e06ac3c334032c7d96dd5ac20ea70a99c1058bab0c2ff35c3acf6c37550987de53406c58effcb6ab656e04f61bdc3ce05a15c69ed9f15948302165036cece92173ec9b03a1e037ada015188ffaba02cea72ca910132cd4e50826ab229760f8905e74d4a29a53bdf2a968e0a26ec2d76cb1a30f9ebfeb68e756f2aef2e32b383a0981b56b85d7be2ded3f1ab7b263e2f5622c82d46a004150f139839f95e93696986e	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exef5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

pid	process
4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
1284	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
1284	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

description	pid	process	target process
PID 4640 wrote to memory of 4312	4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe	icacls.exe
PID 4640 wrote to memory of 4312	4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe	icacls.exe
PID 4640 wrote to memory of 4312	4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe	icacls.exe
PID 4640 wrote to memory of 1284	4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
PID 4640 wrote to memory of 1284	4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
PID 4640 wrote to memory of 1284	4640	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe	f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
"C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\b3725838-913e-4992-a4b8-ede58859ce9d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  PID:4312
- C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
  "C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1284

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

1

T1222

Install Root Certificate

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

Filesize
727B

MD5
263d12469947e2539c2a2a04bb056345

SHA1
a63fd9efc397db4cc1a82cf89b7fc8e0f6694d39

SHA256
102af65a56e5cea616b871487be0aa8525e3258d514ca80d3a2918c3a4f23315

SHA512
571bd3d3ec72023ea4ec0861baeff535fc3e71716f2c08c3305f25d615448b13a4d4bc0f7d05c500f523ad13e6ba3c2e2549891c63cc170b7f1743bc8a148df1

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

Filesize
471B

MD5
1670ab0904b0779e9046a6c0ae0ccf8b

SHA1
0030369be3da0ef23ac809d8963fdeb76de17eeb

SHA256
34a5f72509ddfed75552cbb5007e460c9c9f6dc6c511b12e32083b1a9c030ba5

SHA512
e0cf63ec3f97979c2ad1318954f2daecc3639c3112548796ba8996eb119443a4bca933e1353f1dfd4068de7925ef765a3a9f4f5591702c5876b9a46246415e7e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

Filesize
402B

MD5
05c46eeafd62e3db76ee594318f15c4c

SHA1
1c12e9226ca3a9678a7eadc32965834a6ef202b9

SHA256
19dcec053d561e25f1ce22100227ff7719c4e59cb2e73049dfaae955892b4905

SHA512
bb5f86dc6f639d31da1d6e3bea39466077bb117eba2f0d954bd669e75c8c14601e94907d435ed56e89c3b759f7c3de34b78e24ddf4e1ace116317d04f2496d17

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

Filesize
396B

MD5
725f24a8e4aeee423be093e0165cf2a0

SHA1
0defe775182f2bc54c0b5e7a2dadffb203026a3a

SHA256
c28e9126f6237ce19995940cae7eb6421f5ec53585e4a741726bc6fa981a9bd7

SHA512
8ef2aa69dd44c2b60307a1d95eece5082194b2a164d9a06933144925c6cfc5511f1968e7ddfe4363855b17e72104e8bc5c4f03339b6b4771c12959266fa88f02

Download Submit
C:\Users\Admin\AppData\Local\b3725838-913e-4992-a4b8-ede58859ce9d\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

Filesize
683KB

MD5
22e0f02888c452e5a90aa375e0475987

SHA1
884d2ea4fa6659ac1e09572100502409a0eaf748

SHA256
f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd

SHA512
7845232099215d8dd670d5219f6967e5caf34678f86c32865fe8d03551ea84575f882738a7edec5b35d75d0d5207e9e32140431572ff9f622ab2a1384dc70046

Download Submit
memory/1284-135-0x0000000000000000-mapping.dmp

Download
memory/1284-136-0x00000000053AF000-0x0000000005440000-memory.dmp

Filesize
580KB

Download
memory/1284-141-0x0000000000400000-0x0000000003752000-memory.dmp

Filesize
51.3MB

Download
memory/1284-142-0x0000000005450000-0x000000000556A000-memory.dmp

Filesize
1.1MB

Download
memory/4312-133-0x0000000000000000-mapping.dmp

Download
memory/4640-131-0x0000000005530000-0x000000000564A000-memory.dmp

Filesize
1.1MB

Download
memory/4640-132-0x0000000000400000-0x0000000003752000-memory.dmp

Filesize
51.3MB

Download
memory/4640-130-0x0000000005491000-0x0000000005522000-memory.dmp

Filesize
580KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads