Analysis
- max time kernel
112s - max time network
127s - platform
windows10_x64 - resource
win10v20210408 - submitted
05/05/2021, 15:21
Static task
static1
Behavioral task
behavioral1
Sample
1c55f4476051bb671dbf5a2158fe5d78.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
1c55f4476051bb671dbf5a2158fe5d78.exe
Resource
win10v20210408
General
- Target 1c55f4476051bb671dbf5a2158fe5d78.exe
- Size 831KB
- Sample210505-qsadfv2vw6
- SHA256 c5ed16a495c5efbbf19918adfe4a954decc118b18691f38741d12d4f465948a5
- MD5 1c55f4476051bb671dbf5a2158fe5d78
- SHA1 5a2481837417b7d0d738021e996cdb389e01913d
- SHA512 d04be513ea205ce99e8a965dd6f04e1e4e919939e6ecaeb617941ec237ab66f4410b3aa2fb4cfdb223507b2f726e874e6f34a9670a0b28a72bf19085e19d55af
- MD5 SHA1 SHA512
Malware Config
Signatures
- Deletes Windows Defender Definitions 2 TTPs 1 IoCs
Uses mpcmdrun utility to delete all AV definitions.
pid Process 424 mpcmdrun.exe - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Disables Task Manager via registry modification
- Downloads MZ/PE file
- Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\drivers\etc\hosts updatewin2.exe - Executes dropped EXE 4 IoCs
pid Process 496 updatewin1.exe 392 updatewin2.exe 2548 5.exe 3620 updatewin1.exe - Loads dropped DLL 2 IoCs
pid Process 2548 5.exe 2548 5.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 2608 icacls.exe - Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a1f146d4-20fa-493f-bde1-94d1d5ee622f\\1c55f4476051bb671dbf5a2158fe5d78.exe\" --AutoStart" 1c55f4476051bb671dbf5a2158fe5d78.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- 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 13 api.2ip.ua 21 api.2ip.ua 12 api.2ip.ua - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 14 IoCs
pid pid_target Process procid_target 3556 2548 WerFault.exe 83 2884 2548 WerFault.exe 83 2300 2548 WerFault.exe 83 2648 2548 WerFault.exe 83 3548 2548 WerFault.exe 83 1220 2548 WerFault.exe 83 580 2548 WerFault.exe 83 2692 2548 WerFault.exe 83 2728 2548 WerFault.exe 83 3520 2548 WerFault.exe 83 2332 2548 WerFault.exe 83 2396 2548 WerFault.exe 83 2544 2548 WerFault.exe 83 2520 2548 WerFault.exe 83 - Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 5.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 5.exe - Delays execution with timeout.exe 1 IoCs
pid Process 496 timeout.exe - Kills process with taskkill 1 IoCs
pid Process 900 taskkill.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 1c55f4476051bb671dbf5a2158fe5d78.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 5c000000010000000400000000080000090000000100000054000000305206082b0601050507030206082b06010505070303060a2b0601040182370a030406082b0601050507030406082b0601050507030606082b0601050507030706082b0601050507030106082b0601050507030853000000010000004300000030413022060c2b06010401b231010201050130123010060a2b0601040182373c0101030200c0301b060567810c010330123010060a2b0601040182373c0101030200c0620000000100000020000000d7a7a0fb5d7e2731d771e9484ebcdef71d5f0c3e0a2948782bc83ee0ea699ef40b000000010000001c0000005300650063007400690067006f002000280041004100410029000000140000000100000014000000a0110a233e96f107ece2af29ef82a57fd030a4b41d00000001000000100000002e0d6875874a44c820912e85e964cfdb030000000100000014000000d1eb23a46d17d68fd92564c2f1f1601764d8e349200000000100000036040000308204323082031aa003020102020101300d06092a864886f70d0101050500307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c18414141204365727469666963617465205365727669636573301e170d3034303130313030303030305a170d3238313233313233353935395a307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c1841414120436572746966696361746520536572766963657330820122300d06092a864886f70d01010105000382010f003082010a0282010100be409df46ee1ea76871c4d45448ebe46c883069dc12afe181f8ee402faf3ab5d508a16310b9a06d0c57022cd492d5463ccb66e68460b53eacb4c24c0bc724eeaf115aef4549a120ac37ab23360e2da8955f32258f3dedccfef8386a28c944f9f68f29890468427c776bfe3cc352c8b5e07646582c048b0a891f9619f762050a891c766b5eb78620356f08a1a13ea31a31ea099fd38f6f62732586f07f56bb8fb142bafb7aaccd6635f738cda0599a838a8cb17783651ace99ef4783a8dcf0fd942e2980cab2f9f0e01deef9f9949f12ddfac744d1b98b547c5e529d1f99018c7629cbe83c7267b3e8a25c7c0dd9de6356810209d8fd8ded2c3849c0d5ee82fc90203010001a381c03081bd301d0603551d0e04160414a0110a233e96f107ece2af29ef82a57fd030a4b4300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff307b0603551d1f047430723038a036a0348632687474703a2f2f63726c2e636f6d6f646f63612e636f6d2f414141436572746966696361746553657276696365732e63726c3036a034a0328630687474703a2f2f63726c2e636f6d6f646f2e6e65742f414141436572746966696361746553657276696365732e63726c300d06092a864886f70d010105050003820101000856fc02f09be8ffa4fad67bc64480ce4fc4c5f60058cca6b6bc1449680476e8e6ee5dec020f60d68d50184f264e01e3e6b0a5eebfbc745441bffdfc12b8c74f5af48960057f60b7054af3f6f1c2bfc4b97486b62d7d6bccd2f346dd2fc6e06ac3c334032c7d96dd5ac20ea70a99c1058bab0c2ff35c3acf6c37550987de53406c58effcb6ab656e04f61bdc3ce05a15c69ed9f15948302165036cece92173ec9b03a1e037ada015188ffaba02cea72ca910132cd4e50826ab229760f8905e74d4a29a53bdf2a968e0a26ec2d76cb1a30f9ebfeb68e756f2aef2e32b383a0981b56b85d7be2ded3f1ab7b263e2f5622c82d46a004150f139839f95e93696986e 1c55f4476051bb671dbf5a2158fe5d78.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 3556 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2884 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2300 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe 2648 WerFault.exe - Suspicious use of AdjustPrivilegeToken 20 IoCs
description pid Process Token: SeRestorePrivilege 3556 WerFault.exe Token: SeBackupPrivilege 3556 WerFault.exe Token: SeDebugPrivilege 3556 WerFault.exe Token: SeDebugPrivilege 2884 WerFault.exe Token: SeDebugPrivilege 2300 WerFault.exe Token: SeDebugPrivilege 2648 WerFault.exe Token: SeDebugPrivilege 3548 WerFault.exe Token: SeDebugPrivilege 1220 WerFault.exe Token: SeDebugPrivilege 580 WerFault.exe Token: SeDebugPrivilege 2692 WerFault.exe Token: SeDebugPrivilege 2728 WerFault.exe Token: SeDebugPrivilege 3520 WerFault.exe Token: SeDebugPrivilege 2332 WerFault.exe Token: SeDebugPrivilege 2396 WerFault.exe Token: SeDebugPrivilege 2544 WerFault.exe Token: SeDebugPrivilege 2520 WerFault.exe Token: SeDebugPrivilege 900 taskkill.exe Token: SeDebugPrivilege 368 powershell.exe Token: SeDebugPrivilege 1760 powershell.exe Token: SeDebugPrivilege 4000 powershell.exe - Suspicious use of WriteProcessMemory 41 IoCs
description pid Process procid_target PID 1000 wrote to memory of 2608 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 75 PID 1000 wrote to memory of 2608 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 75 PID 1000 wrote to memory of 2608 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 75 PID 1000 wrote to memory of 2336 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 76 PID 1000 wrote to memory of 2336 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 76 PID 1000 wrote to memory of 2336 1000 1c55f4476051bb671dbf5a2158fe5d78.exe 76 PID 2336 wrote to memory of 496 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 80 PID 2336 wrote to memory of 496 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 80 PID 2336 wrote to memory of 496 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 80 PID 2336 wrote to memory of 392 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 81 PID 2336 wrote to memory of 392 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 81 PID 2336 wrote to memory of 392 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 81 PID 2336 wrote to memory of 2548 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 83 PID 2336 wrote to memory of 2548 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 83 PID 2336 wrote to memory of 2548 2336 1c55f4476051bb671dbf5a2158fe5d78.exe 83 PID 496 wrote to memory of 3620 496 updatewin1.exe 96 PID 496 wrote to memory of 3620 496 updatewin1.exe 96 PID 496 wrote to memory of 3620 496 updatewin1.exe 96 PID 3620 wrote to memory of 368 3620 updatewin1.exe 99 PID 3620 wrote to memory of 368 3620 updatewin1.exe 99 PID 3620 wrote to memory of 368 3620 updatewin1.exe 99 PID 2548 wrote to memory of 412 2548 5.exe 102 PID 2548 wrote to memory of 412 2548 5.exe 102 PID 2548 wrote to memory of 412 2548 5.exe 102 PID 412 wrote to memory of 900 412 cmd.exe 104 PID 412 wrote to memory of 900 412 cmd.exe 104 PID 412 wrote to memory of 900 412 cmd.exe 104 PID 412 wrote to memory of 496 412 cmd.exe 105 PID 412 wrote to memory of 496 412 cmd.exe 105 PID 412 wrote to memory of 496 412 cmd.exe 105 PID 3620 wrote to memory of 1760 3620 updatewin1.exe 106 PID 3620 wrote to memory of 1760 3620 updatewin1.exe 106 PID 3620 wrote to memory of 1760 3620 updatewin1.exe 106 PID 1760 wrote to memory of 4000 1760 powershell.exe 108 PID 1760 wrote to memory of 4000 1760 powershell.exe 108 PID 1760 wrote to memory of 4000 1760 powershell.exe 108 PID 3620 wrote to memory of 424 3620 updatewin1.exe 110 PID 3620 wrote to memory of 424 3620 updatewin1.exe 110 PID 3620 wrote to memory of 2480 3620 updatewin1.exe 112 PID 3620 wrote to memory of 2480 3620 updatewin1.exe 112 PID 3620 wrote to memory of 2480 3620 updatewin1.exe 112
Processes
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C:\Users\Admin\AppData\Local\Temp\1c55f4476051bb671dbf5a2158fe5d78.exe"C:\Users\Admin\AppData\Local\Temp\1c55f4476051bb671dbf5a2158fe5d78.exe"1⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1000 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\a1f146d4-20fa-493f-bde1-94d1d5ee622f" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
PID:2608
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C:\Users\Admin\AppData\Local\Temp\1c55f4476051bb671dbf5a2158fe5d78.exe"C:\Users\Admin\AppData\Local\Temp\1c55f4476051bb671dbf5a2158fe5d78.exe" --Admin IsNotAutoStart IsNotTask2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2336 -
C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\updatewin1.exe"C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\updatewin1.exe"3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:496 -
C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\updatewin1.exe"C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\updatewin1.exe" --Admin4⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3620 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned5⤵
- Suspicious use of AdjustPrivilegeToken
PID:368
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"5⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1760 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps16⤵
- Suspicious use of AdjustPrivilegeToken
PID:4000
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C:\Program Files\Windows Defender\mpcmdrun.exe"C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all5⤵
- Deletes Windows Defender Definitions
PID:424
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""5⤵PID:2480
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C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\updatewin2.exe"C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\updatewin2.exe"3⤵
- Drops file in Drivers directory
- Executes dropped EXE
PID:392
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C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\5.exe"C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\5.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2548 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 8364⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3556
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 9164⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2884
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 10764⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2300
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 10804⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2648
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 10884⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:3548
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 11124⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:1220
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 14044⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:580
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 14484⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:2692
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 14364⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:2728
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 14564⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:3520
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 14164⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:2332
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 17004⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:2396
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 17124⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:2544
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 18244⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:2520
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\87a16454-5772-408f-a1f1-46ddf834635a\5.exe" & del C:\ProgramData\*.dll & exit4⤵
- Suspicious use of WriteProcessMemory
PID:412 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im 5.exe /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:900
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C:\Windows\SysWOW64\timeout.exetimeout /t 65⤵
- Delays execution with timeout.exe
PID:496
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