djvu | e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54

General

Target

e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
Size

730KB
MD5

4858e6b3b3bbccbfea0105b3644f4acd
SHA1

efd8afa3ff89590c662f6ebc1689397a142c1a4e
SHA256

e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54
SHA512

7e655b980e5e9a33e4b3e48fbe9e7b491f71783d204b81473caff8ed00c449ed1f020eabd710663db7bec3ead9533fbaaf6b78fbc7eb0e7c385c55352c03c59a
SSDEEP

12288:kUh/e8Co0hOeLh+gd8ZqKvR+DgXBP66vM/xN4zDbPELPBRE4eXOtU:kUgHBLLh+6kJPXWUbPejIB

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/2620-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5008-5-0x0000000004B40000-0x0000000004C5B000-memory.dmp	family_djvu
behavioral2/memory/2620-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2620-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2620-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2620-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/788-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

420 icacls.exe

pid	process
420	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d40cafd1-9847-4064-a74d-4ff459fa4fe0\\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe\" --AutoStart"	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.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

1 api.2ip.ua
2 api.2ip.ua
6 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exee3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

description	pid	process	target process
PID 5008 set thread context of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 set thread context of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.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:

e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exee3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

pid	process
2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
788	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
788	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exee3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exee3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
"C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5008
- C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
  "C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2620
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d40cafd1-9847-4064-a74d-4ff459fa4fe0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:420
- - C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
    "C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3556
  - - C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
      "C:\Users\Admin\AppData\Local\Temp\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:788

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
6f6e3fca3096a0e7e7eb59d51f4a5350

SHA1
c978fa12d9045c593d5e7e097037ee465e09c3b2

SHA256
d27a9ba9c11dbd9c2b2bcb61a4128f457e7d15a3db20fad170588821e4003d78

SHA512
c45004cb6359a32eb55f1f2ff762ab948d79991ec890ceaf988d513ff9cd4dc0168deb2235b391b43ca8d69d960ba302fde0ed13a2b0e1dddbd63135f27cb546

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
2b4a95ce3a28ccdce55d582ef64db82d

SHA1
5269e64b4112cadb1284499c4e01556e7a244749

SHA256
e6042e1d2e67729842cc896dd2a438c1b85bfe94365165088f5891b2c30e6cc2

SHA512
68ed58016d208436d4f96acf7a85c7b9d0b21b613ac7ede9f3414ad1de416a3e867a6ab0f5a4a98d9932a72361bd98fdfeb8d2712de6ab65665408ef9e0225e3

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

Filesize
392B

MD5
70c428fc564e5ea73912a5867e2192ac

SHA1
c0b1acb57ea396c49e0897609e4bec87848f3022

SHA256
1da1803338f16ae3149286b4152e0bd1effc18098a04d02487d37b9cfa664c7c

SHA512
ed69becf2484687173d69f0803d90b04f2ecc0dc824904028b7497f7661a00b8d94e56a19187675bb91332cc624d84f9d2270956b6e06b735f25c224ac464a84

Download Submit
C:\Users\Admin\AppData\Local\d40cafd1-9847-4064-a74d-4ff459fa4fe0\e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

Filesize
730KB

MD5
4858e6b3b3bbccbfea0105b3644f4acd

SHA1
efd8afa3ff89590c662f6ebc1689397a142c1a4e

SHA256
e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54

SHA512
7e655b980e5e9a33e4b3e48fbe9e7b491f71783d204b81473caff8ed00c449ed1f020eabd710663db7bec3ead9533fbaaf6b78fbc7eb0e7c385c55352c03c59a

Download Submit
memory/788-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/788-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2620-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2620-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2620-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2620-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2620-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5008-1-0x0000000004AA0000-0x0000000004B3C000-memory.dmp

Filesize
624KB

Download
memory/5008-5-0x0000000004B40000-0x0000000004C5B000-memory.dmp

Filesize
1.1MB

Download

description	pid	process	target process
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 5008 wrote to memory of 2620	5008	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 2620 wrote to memory of 420	2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	icacls.exe
PID 2620 wrote to memory of 420	2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	icacls.exe
PID 2620 wrote to memory of 420	2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	icacls.exe
PID 2620 wrote to memory of 3556	2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 2620 wrote to memory of 3556	2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 2620 wrote to memory of 3556	2620	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe
PID 3556 wrote to memory of 788	3556	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe	e3ad5bc68cd909e0366e8ea5b78a704c2ec9dcc9a21a0ff5c49b2bd6a3f76d54.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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