Analysis
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max time kernel
144s -
max time network
149s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
10/09/2022, 08:32
Static task
static1
Behavioral task
behavioral1
Sample
d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe
Resource
win10-20220812-en
General
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Target
d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe
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Size
832KB
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MD5
20a25d70f0c30355f4a6506bdff1dea5
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SHA1
325aa6a8c7b508493fb2490232e8fff07dc56e7a
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SHA256
d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584
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SHA512
d0d6d9ccb5abdacb77a078bde2f82eaa9dad1ee9ecf2614bad11c6cce847cab554f000c4f9ec0b82d17a51c83d22d87db3bb68bbd247623c8313ac1a6720e60e
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SSDEEP
24576:AFwl9sk7euEWDAN1MuvBYnbMzJNszLHTVbzG4KqjuX:AFksxuebanQgz7BtK
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/5000-144-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2684-149-0x0000000002720000-0x000000000283B000-memory.dmp family_djvu behavioral1/memory/5000-145-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/5000-153-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5000-214-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5000-247-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1840-274-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/1840-345-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1840-372-0x0000000000400000-0x0000000000537000-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 4808 build2.exe 516 build2.exe -
Loads dropped DLL 3 IoCs
pid Process 516 build2.exe 516 build2.exe 516 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1360 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-1-5-21-3844063266-715245855-4050956231-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\632db701-346e-4620-ac10-e54e99fb1a00\\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe\" --AutoStart" d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.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 2 api.2ip.ua 3 api.2ip.ua 13 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 2684 set thread context of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 4504 set thread context of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4808 set thread context of 516 4808 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 3948 516 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 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 1840 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 1840 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 516 build2.exe 516 build2.exe -
Suspicious use of WriteProcessMemory 38 IoCs
description pid Process procid_target PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 2684 wrote to memory of 5000 2684 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 66 PID 5000 wrote to memory of 1360 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 67 PID 5000 wrote to memory of 1360 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 67 PID 5000 wrote to memory of 1360 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 67 PID 5000 wrote to memory of 4504 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 68 PID 5000 wrote to memory of 4504 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 68 PID 5000 wrote to memory of 4504 5000 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 68 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 4504 wrote to memory of 1840 4504 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 70 PID 1840 wrote to memory of 4808 1840 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 71 PID 1840 wrote to memory of 4808 1840 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 71 PID 1840 wrote to memory of 4808 1840 d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe 71 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72 PID 4808 wrote to memory of 516 4808 build2.exe 72
Processes
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C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe"C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2684 -
C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe"C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5000 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\632db701-346e-4620-ac10-e54e99fb1a00" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1360
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C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe"C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4504 -
C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe"C:\Users\Admin\AppData\Local\Temp\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1840 -
C:\Users\Admin\AppData\Local\a7ca335a-5a4d-4fd1-a342-df85d19bdfea\build2.exe"C:\Users\Admin\AppData\Local\a7ca335a-5a4d-4fd1-a342-df85d19bdfea\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4808 -
C:\Users\Admin\AppData\Local\a7ca335a-5a4d-4fd1-a342-df85d19bdfea\build2.exe"C:\Users\Admin\AppData\Local\a7ca335a-5a4d-4fd1-a342-df85d19bdfea\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:516 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 516 -s 16487⤵
- Program crash
PID:3948
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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
MD5d218726ceb286be659661f17a14720f5
SHA12f614c8fe7c1f3e2a373d3c3d4b57932c40e0887
SHA256ec992ba375dcef3c53ffd3bec1ef2a9028136378f3192532ec1f2204027b1a41
SHA512c9e9daa1ff4b4959ea86200b834842f01c3f34b362dea0bcb9f40956ee7baffea055ddb1d650fc85ef15ae972c129ca4d71c96fde8d4ef73a820d376fc9dc25f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5ab06d074eaa32fa6a7c190d6c7cee63c
SHA1ab884b7e7480475192067cdfcb9d693fc0dba88d
SHA2566afba2879ae0217b6c4680701e2080b01de6361bd56f15a911a1eefe22c978a4
SHA512da31331c98accb3f90868cdf3ccb0a020abeb3bc1e8388f92b206865413ba784f2e9f30350b26e017f7169ced9a433c2e524d2518d85b48c7c28881767c32d4c
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C:\Users\Admin\AppData\Local\632db701-346e-4620-ac10-e54e99fb1a00\d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584.exe
Filesize832KB
MD520a25d70f0c30355f4a6506bdff1dea5
SHA1325aa6a8c7b508493fb2490232e8fff07dc56e7a
SHA256d78b15ac62e9d735e11f74a115d79a2d145bec3d8bc64ecadab696f31e7f0584
SHA512d0d6d9ccb5abdacb77a078bde2f82eaa9dad1ee9ecf2614bad11c6cce847cab554f000c4f9ec0b82d17a51c83d22d87db3bb68bbd247623c8313ac1a6720e60e
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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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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