Analysis
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max time kernel
147s -
max time network
150s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
09-09-2022 17:12
Static task
static1
Behavioral task
behavioral1
Sample
6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe
Resource
win10-20220812-en
General
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Target
6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe
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Size
726KB
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MD5
4f7c8bf8f71142e7dcca0f8c162f0f35
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SHA1
5630d0af310ad10caaaa17b663121d0c8377518e
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SHA256
6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc
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SHA512
984a3feca07ddcdaec7c52e494e930030736bb1aaf4c731c26c6c8754ae3b34854c14c2c2bfc7e0191e7d407af4234305110ecc8906454d426480ce790923f28
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SSDEEP
12288:2dkA1ll2sVPxFBS9roi+6tdvaxizxjksmg3DROo2O42aSJhjOEyIQbgNa0Q:LfeFBSFs6toxizFkyYcae7yd8NaD
Malware Config
Extracted
djvu
http://acacaca.org/test1/get.php
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extension
.mmpu
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral1/memory/2732-138-0x0000000004AF0000-0x0000000004C0B000-memory.dmp family_djvu behavioral1/memory/4648-151-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4648-152-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/4648-158-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4648-197-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4648-256-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3824-278-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/3824-352-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3824-388-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
pid Process 4416 build2.exe 868 build2.exe -
Loads dropped DLL 3 IoCs
pid Process 868 build2.exe 868 build2.exe 868 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 5012 icacls.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2482096546-1136599444-1359412500-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b48672d5-88dc-4d20-9424-8b7fcb406b23\\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe\" --AutoStart" 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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 4 api.2ip.ua 5 api.2ip.ua 14 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 2732 set thread context of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 4512 set thread context of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4416 set thread context of 868 4416 build2.exe 72 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
pid pid_target Process procid_target 2808 868 WerFault.exe 72 -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 3824 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 3824 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 868 build2.exe 868 build2.exe -
Suspicious use of WriteProcessMemory 38 IoCs
description pid Process procid_target PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 2732 wrote to memory of 4648 2732 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 66 PID 4648 wrote to memory of 5012 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 67 PID 4648 wrote to memory of 5012 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 67 PID 4648 wrote to memory of 5012 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 67 PID 4648 wrote to memory of 4512 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 68 PID 4648 wrote to memory of 4512 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 68 PID 4648 wrote to memory of 4512 4648 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 68 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 4512 wrote to memory of 3824 4512 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 70 PID 3824 wrote to memory of 4416 3824 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 71 PID 3824 wrote to memory of 4416 3824 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 71 PID 3824 wrote to memory of 4416 3824 6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe 71 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72 PID 4416 wrote to memory of 868 4416 build2.exe 72
Processes
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C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe"C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2732 -
C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe"C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4648 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b48672d5-88dc-4d20-9424-8b7fcb406b23" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:5012
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C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe"C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4512 -
C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe"C:\Users\Admin\AppData\Local\Temp\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3824 -
C:\Users\Admin\AppData\Local\53c766cf-be75-4dbe-8f3e-202f5df50109\build2.exe"C:\Users\Admin\AppData\Local\53c766cf-be75-4dbe-8f3e-202f5df50109\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4416 -
C:\Users\Admin\AppData\Local\53c766cf-be75-4dbe-8f3e-202f5df50109\build2.exe"C:\Users\Admin\AppData\Local\53c766cf-be75-4dbe-8f3e-202f5df50109\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:868 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 868 -s 14247⤵
- Program crash
PID:2808
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD5215064dd8b4566627489319b46e9ca43
SHA17fa698eef5f02a961b5862df135d7ebfd8a12292
SHA256390f76fdb79029603900524df2f0fbfd05bf18a3bbc74b9b05b2a6dc5938393c
SHA5122a5b12b41d728ce30f1712d23226bbefe73111b786156b97126d6497ef234e78feaf6db08c7412eaa336c869b93ab239cd46b33cc31ff2c8497214cba5927753
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5a6a0160f7dee79a316edde54d910ebaa
SHA19b374842b8954e8b27a06f22f1c0de15ea768c31
SHA256f3646358e7a0d83e1140296fb384dc20e38a165f8f086cf240ace49e27e5b7c0
SHA5121510a5ac8bb5d3f7a3be3397ef5266861df92bb72d013d8f9432dae8f4310d7d494e67f6b49b712519fb96ef085eb1e233eb8bd4e42bfee10faf0f6da64e4b98
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5dec8beb381337f0a82ecb5b0eae5d04a
SHA163614b319a35f65d9991abbbf55dd649721bd3bd
SHA256a6beba4daa04d4c7d9af9935be17900d573f7183e33fd1309a7baa5e8c0ea50c
SHA512047f3119ab2acfeac6cc381d7319e9756c32a8235f543b8c2d3eb337b74404f53e4e21b7232ba9be3e716d87e29094946ac735c84d378a07962f58bcc0a71465
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5fb76bc29b5ec79524aaa376d018787fc
SHA1fc235acf03d47c2c0577287c3094d52e789d4557
SHA256ef8acbe981d030488ae30a8087e6fc9acda6fc7e29ddc4a7683c4ddebeebf396
SHA5129023a7b2512f72ed733c09a1cfc57e054a202cc3e907efd3ddcc8e1f8e4924d4d7ede145b357b835c0a72f162aa21636ed7201f15f2e29d7644f9fde140ba1c4
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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C:\Users\Admin\AppData\Local\b48672d5-88dc-4d20-9424-8b7fcb406b23\6ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc.exe
Filesize726KB
MD54f7c8bf8f71142e7dcca0f8c162f0f35
SHA15630d0af310ad10caaaa17b663121d0c8377518e
SHA2566ac78daaab60f604ac6aa73658cd9766fd7877c82f35b47144625cda6f58b8cc
SHA512984a3feca07ddcdaec7c52e494e930030736bb1aaf4c731c26c6c8754ae3b34854c14c2c2bfc7e0191e7d407af4234305110ecc8906454d426480ce790923f28
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Filesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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Filesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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Filesize
630KB
MD5e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c