Analysis
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max time kernel
18s -
max time network
135s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
18-07-2021 09:07
Static task
static1
Behavioral task
behavioral1
Sample
usfive_20210718-044029.exe
Resource
win7v20210410
General
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Target
usfive_20210718-044029.exe
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Size
455KB
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MD5
6acecf7a244dbbf26483578e4dc597d5
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SHA1
f1a62a55910bd825459ad1fd9b8a4e64f2d7485f
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SHA256
dbe884a85be7dce2d3db0efb74b9b3c39f5be64730dcce6f7c9e17acc6e444eb
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SHA512
441aef1f9512ab94eeada971d48ec7a56aef061292f0b10880f36f2a8baa9166ff3ad2e4c13aa785d9f6799d694939432d742fd2e627435f021d000ded26c1fe
Malware Config
Signatures
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Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
Processes:
WerFault.exedescription pid process target process PID 2012 created 3672 2012 WerFault.exe hIbjuXFZwH.exe -
DarkVNC Payload 3 IoCs
Processes:
resource yara_rule behavioral2/memory/3672-128-0x00000000025D0000-0x0000000002658000-memory.dmp darkvnc behavioral2/memory/3672-129-0x0000000000400000-0x00000000009CC000-memory.dmp darkvnc behavioral2/memory/2136-131-0x00000281827D0000-0x000002818289A000-memory.dmp darkvnc -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
hIbjuXFZwH.exepid process 3672 hIbjuXFZwH.exe -
Loads dropped DLL 6 IoCs
Processes:
usfive_20210718-044029.exepid process 3944 usfive_20210718-044029.exe 3944 usfive_20210718-044029.exe 3944 usfive_20210718-044029.exe 3944 usfive_20210718-044029.exe 3944 usfive_20210718-044029.exe 3944 usfive_20210718-044029.exe -
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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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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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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Suspicious use of SetThreadContext 1 IoCs
Processes:
hIbjuXFZwH.exedescription pid process target process PID 3672 set thread context of 2136 3672 hIbjuXFZwH.exe WerFault.exe -
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
Processes:
WerFault.exepid pid_target process target process 2012 3672 WerFault.exe hIbjuXFZwH.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 3200 timeout.exe -
Suspicious behavior: EnumeratesProcesses 15 IoCs
Processes:
WerFault.exepid process 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe 2012 WerFault.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
hIbjuXFZwH.exepid process 3672 hIbjuXFZwH.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
WerFault.exedescription pid process Token: SeRestorePrivilege 2012 WerFault.exe Token: SeBackupPrivilege 2012 WerFault.exe Token: SeDebugPrivilege 2012 WerFault.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
usfive_20210718-044029.execmd.exehIbjuXFZwH.exedescription pid process target process PID 3944 wrote to memory of 3672 3944 usfive_20210718-044029.exe hIbjuXFZwH.exe PID 3944 wrote to memory of 3672 3944 usfive_20210718-044029.exe hIbjuXFZwH.exe PID 3944 wrote to memory of 3672 3944 usfive_20210718-044029.exe hIbjuXFZwH.exe PID 3944 wrote to memory of 3472 3944 usfive_20210718-044029.exe cmd.exe PID 3944 wrote to memory of 3472 3944 usfive_20210718-044029.exe cmd.exe PID 3944 wrote to memory of 3472 3944 usfive_20210718-044029.exe cmd.exe PID 3472 wrote to memory of 3200 3472 cmd.exe timeout.exe PID 3472 wrote to memory of 3200 3472 cmd.exe timeout.exe PID 3472 wrote to memory of 3200 3472 cmd.exe timeout.exe PID 3672 wrote to memory of 2136 3672 hIbjuXFZwH.exe WerFault.exe PID 3672 wrote to memory of 2136 3672 hIbjuXFZwH.exe WerFault.exe PID 3672 wrote to memory of 2136 3672 hIbjuXFZwH.exe WerFault.exe PID 3672 wrote to memory of 2136 3672 hIbjuXFZwH.exe WerFault.exe PID 3672 wrote to memory of 2136 3672 hIbjuXFZwH.exe WerFault.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\usfive_20210718-044029.exe"C:\Users\Admin\AppData\Local\Temp\usfive_20210718-044029.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\hIbjuXFZwH.exe"C:\Users\Admin\AppData\Local\Temp\hIbjuXFZwH.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe3⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3672 -s 5003⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.execmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\usfive_20210718-044029.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /T 10 /NOBREAK3⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\hIbjuXFZwH.exeMD5
62025e1810be4eddb2559cc31eda8a6a
SHA11e18807d5efb79ec8e6d2fe579fad19441e8881f
SHA2565927b4c1b4a64d5fbac2d9ebae8093d71c29ae77f1ab6c78c5a8381737e7aa2e
SHA512f5b6ea8d9eb0c4206cce00db8a8fb4d66661701240a1ae58c9d3631d0e388287f7526593348023f9824023f6a09e5dccc4cb553ec6df285cf2288220fe8793d1
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C:\Users\Admin\AppData\Local\Temp\hIbjuXFZwH.exeMD5
62025e1810be4eddb2559cc31eda8a6a
SHA11e18807d5efb79ec8e6d2fe579fad19441e8881f
SHA2565927b4c1b4a64d5fbac2d9ebae8093d71c29ae77f1ab6c78c5a8381737e7aa2e
SHA512f5b6ea8d9eb0c4206cce00db8a8fb4d66661701240a1ae58c9d3631d0e388287f7526593348023f9824023f6a09e5dccc4cb553ec6df285cf2288220fe8793d1
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\Users\Admin\AppData\LocalLow\sqlite3.dllMD5
f964811b68f9f1487c2b41e1aef576ce
SHA1b423959793f14b1416bc3b7051bed58a1034025f
SHA25683bc57dcf282264f2b00c21ce0339eac20fcb7401f7c5472c0cd0c014844e5f7
SHA512565b1a7291c6fcb63205907fcd9e72fc2e11ca945afc4468c378edba882e2f314c2ac21a7263880ff7d4b84c2a1678024c1ac9971ac1c1de2bfa4248ec0f98c4
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\Users\Admin\AppData\LocalLow\wG3cB0qZ3rM5x\freebl3.dllMD5
60acd24430204ad2dc7f148b8cfe9bdc
SHA1989f377b9117d7cb21cbe92a4117f88f9c7693d9
SHA2569876c53134dbbec4dcca67581f53638eba3fea3a15491aa3cf2526b71032da97
SHA512626c36e9567f57fa8ec9c36d96cbadede9c6f6734a7305ecfb9f798952bbacdfa33a1b6c4999ba5b78897dc2ec6f91870f7ec25b2ceacbaee4be942fe881db01
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\Users\Admin\AppData\LocalLow\wG3cB0qZ3rM5x\freebl3.dllMD5
60acd24430204ad2dc7f148b8cfe9bdc
SHA1989f377b9117d7cb21cbe92a4117f88f9c7693d9
SHA2569876c53134dbbec4dcca67581f53638eba3fea3a15491aa3cf2526b71032da97
SHA512626c36e9567f57fa8ec9c36d96cbadede9c6f6734a7305ecfb9f798952bbacdfa33a1b6c4999ba5b78897dc2ec6f91870f7ec25b2ceacbaee4be942fe881db01
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\Users\Admin\AppData\LocalLow\wG3cB0qZ3rM5x\mozglue.dllMD5
eae9273f8cdcf9321c6c37c244773139
SHA18378e2a2f3635574c106eea8419b5eb00b8489b0
SHA256a0c6630d4012ae0311ff40f4f06911bcf1a23f7a4762ce219b8dffa012d188cc
SHA51206e43e484a89cea9ba9b9519828d38e7c64b040f44cdaeb321cbda574e7551b11fea139ce3538f387a0a39a3d8c4cba7f4cf03e4a3c98db85f8121c2212a9097
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\Users\Admin\AppData\LocalLow\wG3cB0qZ3rM5x\nss3.dllMD5
02cc7b8ee30056d5912de54f1bdfc219
SHA1a6923da95705fb81e368ae48f93d28522ef552fb
SHA2561989526553fd1e1e49b0fea8036822ca062d3d39c4cab4a37846173d0f1753d5
SHA5120d5dfcf4fb19b27246fa799e339d67cd1b494427783f379267fb2d10d615ffb734711bab2c515062c078f990a44a36f2d15859b1dacd4143dcc35b5c0cee0ef5
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\Users\Admin\AppData\LocalLow\wG3cB0qZ3rM5x\softokn3.dllMD5
4e8df049f3459fa94ab6ad387f3561ac
SHA106ed392bc29ad9d5fc05ee254c2625fd65925114
SHA25625a4dae37120426ab060ebb39b7030b3e7c1093cc34b0877f223b6843b651871
SHA5123dd4a86f83465989b2b30c240a7307edd1b92d5c1d5c57d47eff287dc9daa7bace157017908d82e00be90f08ff5badb68019ffc9d881440229dcea5038f61cd6
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memory/2136-131-0x00000281827D0000-0x000002818289A000-memory.dmpFilesize
808KB
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memory/2136-130-0x0000028182540000-0x0000028182569000-memory.dmpFilesize
164KB
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memory/2136-127-0x0000000000000000-mapping.dmp
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memory/3200-126-0x0000000000000000-mapping.dmp
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memory/3472-125-0x0000000000000000-mapping.dmp
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memory/3672-128-0x00000000025D0000-0x0000000002658000-memory.dmpFilesize
544KB
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memory/3672-129-0x0000000000400000-0x00000000009CC000-memory.dmpFilesize
5.8MB
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memory/3672-122-0x0000000000000000-mapping.dmp
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memory/3944-114-0x0000000002640000-0x00000000026D3000-memory.dmpFilesize
588KB
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memory/3944-115-0x0000000000400000-0x00000000009ED000-memory.dmpFilesize
5.9MB