djvu | 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925

General

Target

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
Size

738KB
MD5

05567327c48b4b2af47574295ee9748b
SHA1

7595f946efc74526f2b989413e73e3f37c4b4765
SHA256

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925
SHA512

293c0df46670b450a5a840a424ef1848a2dd8634a5e837b1ace4196ba76ba040dcb12a8a0397a4c1583af3d1b63227653999b64247f6b593ef5c1cf2ec33fdea
SSDEEP

12288:xIArWcHGmhaQSRJSYXYDNV+VA6Sy7ng50CgH969W6Cw:xo1JSrDNV7y7n1ldK

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
behavioral2/memory/2372-2-0x0000000004100000-0x000000000421B000-memory.dmp	family_djvu
behavioral2/memory/3428-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-35-0x0000000000400000-0x0000000000537000-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:

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1392 icacls.exe

pid	process
1392	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a0f8d110-3a71-471d-84a6-59f3f952f32e\\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe\" --AutoStart"	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.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

7 api.2ip.ua
8 api.2ip.ua
16 api.2ip.ua

flow	ioc
7	api.2ip.ua
8	api.2ip.ua
16	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

description	pid	process	target process
PID 2372 set thread context of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 set thread context of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.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:

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

pid	process
3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
2956	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
2956	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
"C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2372

C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
"C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3428

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a0f8d110-3a71-471d-84a6-59f3f952f32e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1392

C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
"C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3060

C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
"C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2956

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

MD5
6728aea2631b86a76c237508d8ba9b55

SHA1
7a670f95cac088313f7558869162fe01c6dc0ec9

SHA256
e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b

SHA512
533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5

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
3373dbeea4ce7ec1624a25669b96c0d0

SHA1
a1cef0ea77fac36fdfb3fb6fdfede45370146534

SHA256
cf1c7062acc7a650a31bfb3653c8e7064cd27326594e00e94f1d31f4e3c15753

SHA512
caad38da82117157b25db851a0e011722013bf37403d46be992f91ca623820ecacbe327b38e62b2511db5425e8f37a6672b9421ef534d14aa99dc83babc35c3d

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

MD5
cadba2e275b58dd22a66c2ff973b3bfd

SHA1
18bb988169b11e47968d54b3f1df17f4d6d713a3

SHA256
9884762bca242b6e7b45947b55c5a822081c50b33203ec99887de619ae0b8e82

SHA512
56d8a85f9f3260a8afb217f05c237bdc4fc9562162df552d5769d6b1f27630e9a021e1100161bd210c3532dbb3ea223870c59e5028d1f185d5cf3ca5f9cede87

Download Submit
C:\Users\Admin\AppData\Local\a0f8d110-3a71-471d-84a6-59f3f952f32e\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
Filesize
738KB

MD5
05567327c48b4b2af47574295ee9748b

SHA1
7595f946efc74526f2b989413e73e3f37c4b4765

SHA256
41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925

SHA512
293c0df46670b450a5a840a424ef1848a2dd8634a5e837b1ace4196ba76ba040dcb12a8a0397a4c1583af3d1b63227653999b64247f6b593ef5c1cf2ec33fdea

Download Submit
memory/2372-1-0x00000000026C0000-0x0000000002759000-memory.dmp

Filesize
612KB

Download
memory/2372-2-0x0000000004100000-0x000000000421B000-memory.dmp

Filesize
1.1MB

Download
memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3428-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3428-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3428-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3428-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3428-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3428 wrote to memory of 1392	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	icacls.exe
PID 3428 wrote to memory of 1392	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	icacls.exe
PID 3428 wrote to memory of 1392	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	icacls.exe
PID 3428 wrote to memory of 3060	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3428 wrote to memory of 3060	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3428 wrote to memory of 3060	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads