djvu | 651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc

General

Target

651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Size

831KB
MD5

c3804647168d439928c2ca4019d87609
SHA1

ceb7a332a4ed40878a2c381fcf76fcd06528df65
SHA256

651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc
SHA512

d15fd9303f231915add3ff5cf696d1a5ad90d049f15355337bacf1867e2b968319de7b43de1c4e5c8f3eb8dfbca15766f79b2143e21bcdc14b602b43f4db939f
SSDEEP

12288:yzax3E2dGY3FVW68muE1QfkyGVVXCw8mpMS321U5dIqgomEHlRNeu1XWDtV7E9:yUTPVWvmuE1UkyWt8Qm6gCmE/hM7Q

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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

resource	yara_rule
behavioral2/memory/464-2-0x0000000005F20000-0x000000000603B000-memory.dmp	family_djvu
behavioral2/memory/1932-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1932-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1932-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1932-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1932-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2420-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3716	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-1-5-21-805952410-2104024357-1716932545-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\96edb846-208f-4315-8ea7-88853afb3a39\\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe\" --AutoStart"	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.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
1	api.2ip.ua
2	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 464 set thread context of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 3332 set thread context of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93

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	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
2420	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
2420	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 464 wrote to memory of 1932	464	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	86
PID 1932 wrote to memory of 3716	1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	90
PID 1932 wrote to memory of 3716	1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	90
PID 1932 wrote to memory of 3716	1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	90
PID 1932 wrote to memory of 3332	1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	91
PID 1932 wrote to memory of 3332	1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	91
PID 1932 wrote to memory of 3332	1932	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	91
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93
PID 3332 wrote to memory of 2420	3332	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	93

C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
"C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:464
- C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
  "C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.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:1932
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\96edb846-208f-4315-8ea7-88853afb3a39" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3716
- - C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
    "C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3332
  - - C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
      "C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2420

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

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
c9be626e9715952e9b70f92f912b9787

SHA1
aa2e946d9ad9027172d0d321917942b7562d6abe

SHA256
c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4

SHA512
7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5

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
195829a27221304de133ff75e4e20f07

SHA1
bc6fe1a436a156d576107c0480599ca3af323160

SHA256
4d61465cc3fe6eaad24477fb9a731e6353e4ad3ea5e0b4d25a6ba84dfef22136

SHA512
681fa72d4b50a8096a194b187474388b74ec74330918baf7b55ca1db0cf2e8a06c1edd8455ebcf76fc97b136983af6b920fa97ad93afd54a56607417ca285542

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

Filesize
170B

MD5
ac063f3d03d2ce6e3f7dee1f8c6d65a9

SHA1
e2c23406ccff242204f0de3b564d34a60f0d4881

SHA256
7007ffbda66b79f334078acf185a468a3a0acbdbabd757dbf5d5071673e24269

SHA512
7574f897cf9aba384228b05134777fcb2828492930c185863fb24092f48518e6a60609681cdeb176d6a909d07560362c377d96fa3ea1de8cc370251a75baef0e

Download Submit
C:\Users\Admin\AppData\Local\96edb846-208f-4315-8ea7-88853afb3a39\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Filesize
831KB

MD5
c3804647168d439928c2ca4019d87609

SHA1
ceb7a332a4ed40878a2c381fcf76fcd06528df65

SHA256
651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc

SHA512
d15fd9303f231915add3ff5cf696d1a5ad90d049f15355337bacf1867e2b968319de7b43de1c4e5c8f3eb8dfbca15766f79b2143e21bcdc14b602b43f4db939f

Download Submit
memory/464-2-0x0000000005F20000-0x000000000603B000-memory.dmp

Filesize
1.1MB

Download
memory/464-1-0x0000000004670000-0x0000000004705000-memory.dmp

Filesize
596KB

Download
memory/1932-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1932-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1932-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1932-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1932-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads