djvu | 7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788

General

Target

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
Size

716KB
MD5

e6bd5887b7bb4e9b95c1c9608e599d20
SHA1

56dbd174da60695cfbc8abdd1abd86317f4597e5
SHA256

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788
SHA512

9fd5b6f6bc356c9b86564e19cfe35582b66ad1943cdf491d2a038a89a23dfa5dbfdbf19b1dd9c6aca232a77aa157efe7b978d4275a9ef32f4c767d72a47bfc8c
SSDEEP

12288:BHMbEmBJSKhk21XR2V4D4qTDYTquwRUExooref0Mp+uE3oVlFfV+2qJRSHCEsyZU:BH/QRR7iquwuU/ef0KDEYVlFfh/s

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral1/memory/4892-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4892-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4892-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2772-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp	family_djvu
behavioral1/memory/4892-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4892-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-35-0x0000000000400000-0x0000000000537000-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:

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2432 icacls.exe

pid	process
2432	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6c5121bb-9c6c-442d-ae55-3d4176ebec67\\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe\" --AutoStart"	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.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

6 api.2ip.ua
7 api.2ip.ua
20 api.2ip.ua

flow	ioc
6	api.2ip.ua
7	api.2ip.ua
20	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

description	pid	process	target process
PID 2772 set thread context of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 set thread context of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

pid	process
4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
2204	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
2204	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
"C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2772

C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
"C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4892

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\6c5121bb-9c6c-442d-ae55-3d4176ebec67" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2432

C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
"C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:944

C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
"C:\Users\Admin\AppData\Local\Temp\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2204

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
7bb5a14437331aad24915a3d8546fbc1

SHA1
9a5570c07af0c0cde02858f61e1c7094f5a70f38

SHA256
42397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00

SHA512
a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13

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
71e26a4408f93648a93b2e5b2e3d3d7a

SHA1
e324fd935dd01b03ec4a95c779d0ba0f2fbb1ba4

SHA256
22a31e2ec9a3e0cdf35a9322a50cad5354f5d569afc87b49cb98125890475569

SHA512
13117751be674d168a3efedc690455703e743679077d082577774faff6e1c85fe5bf0414b6b72e54ea1ab8e7ec3bcac2559e1241809ea0c9b2d704182e434cba

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
3314d1e3efd914047841d2eaf9a40eb0

SHA1
d258de50284065d93c337020d7a5cd95187360ce

SHA256
24b31e92be325f27dc2fd1c50e442b4e390522fe5fdab93100957cf33bdca389

SHA512
881958e806734ef1343a7f41d9e828bb87b567a69d6c42d9d31cc8c63ee77eeaccde783f613b5f498b9f65d42b045531824bd940131c0d466ab2f22b87e99c8e

Download Submit
C:\Users\Admin\AppData\Local\6c5121bb-9c6c-442d-ae55-3d4176ebec67\7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
Filesize
716KB

MD5
e6bd5887b7bb4e9b95c1c9608e599d20

SHA1
56dbd174da60695cfbc8abdd1abd86317f4597e5

SHA256
7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788

SHA512
9fd5b6f6bc356c9b86564e19cfe35582b66ad1943cdf491d2a038a89a23dfa5dbfdbf19b1dd9c6aca232a77aa157efe7b978d4275a9ef32f4c767d72a47bfc8c

Download Submit
memory/2204-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2772-1-0x0000000004950000-0x00000000049F2000-memory.dmp

Filesize
648KB

Download
memory/2772-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp

Filesize
1.1MB

Download
memory/4892-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4892-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4892-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4892-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4892-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 2772 wrote to memory of 4892	2772	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 4892 wrote to memory of 2432	4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	icacls.exe
PID 4892 wrote to memory of 2432	4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	icacls.exe
PID 4892 wrote to memory of 2432	4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	icacls.exe
PID 4892 wrote to memory of 944	4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 4892 wrote to memory of 944	4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 4892 wrote to memory of 944	4892	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe
PID 944 wrote to memory of 2204	944	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe	7f24053718028f3dae53aac65d1bd159721d9f78e39b209407e9cb56c48aa788.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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