djvu | 4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0

General

Target

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
Size

820KB
MD5

a51278df62555db9d74f10c47cefda7a
SHA1

4b5a4f15426e035696919a168aa368006b855f0d
SHA256

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0
SHA512

57c1e065d6df96a56fc49f050dd5ffc7da28aac2406f61cf129e18ae8c3ae8a6ce24f434b8b99fc1db241ba8628a690ee24a7669d9778811b22db79f45627ef7

Score

10^/10

djvu discovery persistence ransomware suricata

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/lancer/get.php

Attributes

extension
.hgsh
offline_id
gYuqQ5GsAaJom08TivUVhlPzZDKd916x4NcXrWt1
payload_url
http://kotob.top/dl/build2.exe

http://tzgl.org/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, 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-m8LBBi8x8F 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: 0358Sigrj

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3964-119-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3964-120-0x0000000000424141-mapping.dmp	family_djvu
behavioral1/memory/1912-121-0x0000000002370000-0x000000000248B000-memory.dmp	family_djvu
behavioral1/memory/3964-122-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/572-128-0x0000000000424141-mapping.dmp	family_djvu
behavioral1/memory/572-133-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1328 icacls.exe

pid	process
1328	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7c937295-7086-4acc-8e5b-308e36abb2dd\\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe\" --AutoStart"	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.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

10 api.2ip.ua
11 api.2ip.ua
24 api.2ip.ua

flow	ioc
10	api.2ip.ua
11	api.2ip.ua
24	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

description	pid	process	target process
PID 1912 set thread context of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 set thread context of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

pid	process
3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
572	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
572	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
"C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
  "C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3964
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7c937295-7086-4acc-8e5b-308e36abb2dd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1328
- - C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
    "C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3692
  - - C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
      "C:\Users\Admin\AppData\Local\Temp\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:572

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

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\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

MD5
1c63500df0b57e29edd1a5867d9f0e9b

SHA1
0475a0611ac4d171e90b46303b96317fc186b15d

SHA256
c8f7c1bd12b80996707a806866379d91dc3008d5d2b0eeeb6d97d418aeeb7914

SHA512
29b914ffe63496d98e8ffb76afde49702888743c88bd0fc6aabdf3e8855e3a5389d933a29ccb4564e8d3198c159a1debfb56d6f39f428689f8eb4d497b341bde

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

MD5
65052acb8dc97b38007797064162c9a1

SHA1
862cf5f74d74b85103b088650a230ed0c6d32df3

SHA256
ef406913c83356f132bbc250646c24befee2acfdabbc9debcbca68c1da01a30f

SHA512
976f4bd21af190164d04534f4e534d44e14fd5d3c6798421f84ead4e0a53f25d386d4b59bfe0c7c5865af4f22593d975d6b48292b024a4b6ca0d65ff6ee735bd

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

MD5
0ae0641ad8c2d85d6b866e43cc5d306e

SHA1
4f2088ba32f9c894fd562fe5698666e91a199124

SHA256
9498ff623583d6f310f928cb515ae1eb943b560410869fcaa8b0ca47f97539ed

SHA512
725c4468f310fe68bf48c3448a7e05387c012eb20912ed07a5362f62cb62d628332693dd2575a3fc18f819d6ce9d909bf21f37a0101bffcdb00a658ace3bc0a6

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

MD5
80b6c7bbdc2258941e3420efcb816f74

SHA1
b033451807300abd75122020e21d803e31a1ae9b

SHA256
8a93ea6c7fce073fdf21de4da69002f47bb8d41fd8176d918a5da9e5e05ff082

SHA512
9e9d7de4cb71657f3fe429d3a8fa3ce0ad351011885f32b8cd09310cfac058a7251283d4c856eac8c35e21063f339247a43ca23db882f3abc3b3a0136d805a06

Download Submit
C:\Users\Admin\AppData\Local\7c937295-7086-4acc-8e5b-308e36abb2dd\4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

MD5
a51278df62555db9d74f10c47cefda7a

SHA1
4b5a4f15426e035696919a168aa368006b855f0d

SHA256
4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0

SHA512
57c1e065d6df96a56fc49f050dd5ffc7da28aac2406f61cf129e18ae8c3ae8a6ce24f434b8b99fc1db241ba8628a690ee24a7669d9778811b22db79f45627ef7

Download Submit
memory/572-128-0x0000000000424141-mapping.dmp

Download
memory/572-133-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1328-123-0x0000000000000000-mapping.dmp

Download
memory/1912-118-0x00000000022AD000-0x000000000233F000-memory.dmp

Filesize
584KB

Download
memory/1912-121-0x0000000002370000-0x000000000248B000-memory.dmp

Filesize
1.1MB

Download
memory/3692-125-0x0000000000000000-mapping.dmp

Download
memory/3692-126-0x00000000021B0000-0x0000000002242000-memory.dmp

Filesize
584KB

Download
memory/3964-122-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3964-120-0x0000000000424141-mapping.dmp

Download
memory/3964-119-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 1912 wrote to memory of 3964	1912	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3964 wrote to memory of 1328	3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	icacls.exe
PID 3964 wrote to memory of 1328	3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	icacls.exe
PID 3964 wrote to memory of 1328	3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	icacls.exe
PID 3964 wrote to memory of 3692	3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3964 wrote to memory of 3692	3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3964 wrote to memory of 3692	3964	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe
PID 3692 wrote to memory of 572	3692	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe	4d5b80b66d729aa6c57d791de1c9eab5b513517d7b456147e3964041556beec0.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads