djvu | 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

General

Target

82C4.exe
Size

768KB
MD5

663a7ee6f23102380056645ded592075
SHA1

42f7de8be635ed37f91c289a81e71bc67139adb9
SHA256

2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f
SHA512

9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09
SSDEEP

12288:wyEfg9+yzz81R9K4UW/ug6nkYxMDoG8AGjn6PkRnTFXD1l9e8k7phRuHH8n4p:IQmQ43/rYE8vdnTFRU6H84

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://rlrz.org/fhsgtsspen6/get.php

Attributes

extension
.nqsq
offline_id
OGykROpbgxJhrG1qc9yB9PwnsSv1Eo04vOCP0rt1
payload_url
http://znpst.top/dl/build2.exe

http://rlrz.org/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2956-2-0x0000000000830000-0x000000000094B000-memory.dmp	family_djvu
behavioral2/memory/1192-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1192-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1192-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1192-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1192-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-39-0x0000000000400000-0x0000000000537000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	82C4.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
216	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0eb4a683-d45b-41a1-84eb-18bd94376d4b\\82C4.exe\" --AutoStart"	82C4.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.

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2956 set thread context of 1192	2956	82C4.exe	82
PID 2672 set thread context of 4156	2672	82C4.exe	86

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1192	82C4.exe
1192	82C4.exe
4156	82C4.exe
4156	82C4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 2956 wrote to memory of 1192	2956	82C4.exe	82
PID 1192 wrote to memory of 216	1192	82C4.exe	83
PID 1192 wrote to memory of 216	1192	82C4.exe	83
PID 1192 wrote to memory of 216	1192	82C4.exe	83
PID 1192 wrote to memory of 2672	1192	82C4.exe	84
PID 1192 wrote to memory of 2672	1192	82C4.exe	84
PID 1192 wrote to memory of 2672	1192	82C4.exe	84
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86
PID 2672 wrote to memory of 4156	2672	82C4.exe	86

C:\Users\Admin\AppData\Local\Temp\82C4.exe
"C:\Users\Admin\AppData\Local\Temp\82C4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Users\Admin\AppData\Local\Temp\82C4.exe
  "C:\Users\Admin\AppData\Local\Temp\82C4.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1192
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0eb4a683-d45b-41a1-84eb-18bd94376d4b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:216
- - C:\Users\Admin\AppData\Local\Temp\82C4.exe
    "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2672
  - - C:\Users\Admin\AppData\Local\Temp\82C4.exe
      "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4156

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
228ffc96d4d6f05dfb6110ac018ae30c

SHA1
c82c5ec11a1bca8958bdebbd64c0c691efb58dbe

SHA256
80d3aa1dccd89b15fd34ae9ece693ffa4722f85c78cc2fe964d94ba179f07411

SHA512
2d21648a143495be63bc258bb366d41bf6a20ff1a53e271b2b2ac64b0e31b75e46772a8ef9a32e7011a0d60cc3635c394a766ebf1d2d93a22b78adb05a2b3f52

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
c09a84c37184e9069455cc75ad47c34e

SHA1
e9cd1991ba8d729ce20df3cf15bc06191c9900c7

SHA256
969db4747fa92e79e2efeacc92e6acdbc3559b2e0e4cfdc2edb2a456fa6969dd

SHA512
195bd07a323d315acb30a46f680a25dc70182200d255e527710a433de28e5a681ceefdbdf0b0dd3d9890ea6f3be9c1ae47dba530b63d9fb241f2540201005aff

Download Submit
C:\Users\Admin\AppData\Local\0eb4a683-d45b-41a1-84eb-18bd94376d4b\82C4.exe

Filesize
768KB

MD5
663a7ee6f23102380056645ded592075

SHA1
42f7de8be635ed37f91c289a81e71bc67139adb9

SHA256
2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

SHA512
9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09

Download Submit
memory/1192-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1192-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1192-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1192-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1192-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2672-19-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/2672-23-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/2956-1-0x0000000000610000-0x00000000006A4000-memory.dmp

Filesize
592KB

Download
memory/2956-2-0x0000000000830000-0x000000000094B000-memory.dmp

Filesize
1.1MB

Download
memory/4156-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads