djvu | 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6

General

Target

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
Size

807KB
MD5

facb53cd1795e8855b6c35710034d98a
SHA1

016c1626958a4a5bd9af4461672f403d54f37a4b
SHA256

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6
SHA512

711960191216ffc25c74bac12af22a851e7d8d3841342edf1b23b390dc52f90ff27f6888e10fc25042ce69c5c7f949c9cef0adbabaf3a1f50e4624a637a974c3
SSDEEP

12288:P4Rq05M/+a307OAHnYedSV3C0CkTsa8HImvAfppCDsPpJBpy0wsF:wFI3uOMSVy0CCsa8iTCDsPvfwsF

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vehu
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 16 IoCs

Processes:

resource	yara_rule
behavioral1/memory/768-2-0x0000000003D60000-0x0000000003E7B000-memory.dmp	family_djvu
behavioral1/memory/4992-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4992-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4992-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4992-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4992-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/380-33-0x0000000000400000-0x0000000002015000-memory.dmp	family_djvu
behavioral1/memory/3476-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3476-40-0x0000000000400000-0x0000000000537000-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:

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

3932 icacls.exe

pid	process
3932	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c7f6720c-1724-460d-bcd8-cce2e9d00e6f\\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe\" --AutoStart"	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.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

2 api.2ip.ua
4 api.2ip.ua
16 api.2ip.ua

flow	ioc
2	api.2ip.ua
4	api.2ip.ua
16	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

description	pid	process	target process
PID 768 set thread context of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 set thread context of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.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:

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

pid	process
4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
3476	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
3476	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:768

C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4992

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\c7f6720c-1724-460d-bcd8-cce2e9d00e6f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3932

C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:380

C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3476

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

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Downloads

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

MD5
7575c39a544943a68ce6e709c586005a

SHA1
4874b30bd1d455b28a95c4e21c5aecd1ea043d7a

SHA256
4737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8

SHA512
abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1

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
e824acb2fa640c6ddfbc9c7a3b3f65c4

SHA1
7b387e77708cc98291b9e8c06a5a22b296333ef8

SHA256
0fdf167df2159cc4c6c9dd67e47049678916b5660f33618f9a6c15c6669cc5a7

SHA512
972baffb77ad2a3d6b51a4bacf26482288847c94ac13ecf8c6a30b9b73c18de4764ca1002a788e362122812aca64edf205cf9486026d41173a7d5371e81efcb4

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

MD5
9326e40a8ad6ee96dd361f80c06ced53

SHA1
226dc4755c210c64c3b494b3b9cda8609a52cd98

SHA256
3d5d045529479d4078a0df7a7bd21a6ff4511089c77e3fb551f0cebee93fa53e

SHA512
d139827c2bf6da9f79030dbb9943205e8536e56429a303a364eadce24bb1006078f0a4834ccd433619df6838b104382afc8d1b8dccc8114f838221d6e4c0ff37

Download Submit
C:\Users\Admin\AppData\Local\c7f6720c-1724-460d-bcd8-cce2e9d00e6f\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
Filesize
807KB

MD5
facb53cd1795e8855b6c35710034d98a

SHA1
016c1626958a4a5bd9af4461672f403d54f37a4b

SHA256
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6

SHA512
711960191216ffc25c74bac12af22a851e7d8d3841342edf1b23b390dc52f90ff27f6888e10fc25042ce69c5c7f949c9cef0adbabaf3a1f50e4624a637a974c3

Download Submit
memory/380-23-0x0000000000400000-0x0000000002015000-memory.dmp

Filesize
28.1MB

Download
memory/380-33-0x0000000000400000-0x0000000002015000-memory.dmp

Filesize
28.1MB

Download
memory/768-1-0x00000000022C0000-0x0000000002357000-memory.dmp

Filesize
604KB

Download
memory/768-2-0x0000000003D60000-0x0000000003E7B000-memory.dmp

Filesize
1.1MB

Download
memory/3476-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3476-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 768 wrote to memory of 4992	768	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 4992 wrote to memory of 3932	4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	icacls.exe
PID 4992 wrote to memory of 3932	4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	icacls.exe
PID 4992 wrote to memory of 3932	4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	icacls.exe
PID 4992 wrote to memory of 380	4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 4992 wrote to memory of 380	4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 4992 wrote to memory of 380	4992	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
PID 380 wrote to memory of 3476	380	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe	37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads