Analysis
- max time kernel
151s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
28/01/2024, 03:36
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
7c0b7776d8e7e775fb646f2bf3c91c46.dll
Resource
win7-20231215-en
9 signatures
150 seconds
General
- Target 7c0b7776d8e7e775fb646f2bf3c91c46.dll
- Size 1.8MB
- Sample240128-d589msadf8
- SHA256 6e2ba94de342be1b5ed71468cb2628106a823c38419cbb3fc6f612465523853b
- MD5 7c0b7776d8e7e775fb646f2bf3c91c46
- SHA1 716d6d1caf34896aa69120fc3f08e7f480e3176e
- SHA512 874c1bf7a350dd8a81d00b9edfa95efd5c1f58b3b185fe99f8e58e4f3929b7646509c75b5524c49b7c6a679ea4be003471de69f236ea24c18dd192fa5fa50f5b
- SSDEEP 12288:iVI0W/TtlPLfJCm3WIYxJ9yK5IQ9PElOlidGAWilgm5Qq0nB6wtt4AenZ1:/fP7fWsK5z9A+WGAW+V5SB6Ct4bnb
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
-
resource yara_rule behavioral2/memory/3408-4-0x0000000001260000-0x0000000001261000-memory.dmp dridex_stager_shellcode - Executes dropped EXE 3 IoCs
pid Process 4636 tabcal.exe 4896 BdeUISrv.exe 960 AtBroker.exe - Loads dropped DLL 3 IoCs
pid Process 4636 tabcal.exe 4896 BdeUISrv.exe 960 AtBroker.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Gdfgjdhwrlpouj = "C:\\Users\\Admin\\AppData\\Roaming\\MICROS~1\\Windows\\STARTM~1\\Programs\\MAINTE~1\\SGVLdslV\\BdeUISrv.exe" Process not Found -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA tabcal.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA BdeUISrv.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA AtBroker.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 5028 rundll32.exe 5028 rundll32.exe 5028 rundll32.exe 5028 rundll32.exe 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found 3408 Process not Found - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeShutdownPrivilege 3408 Process not Found Token: SeCreatePagefilePrivilege 3408 Process not Found Token: SeShutdownPrivilege 3408 Process not Found Token: SeCreatePagefilePrivilege 3408 Process not Found - Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 3408 Process not Found 3408 Process not Found - Suspicious use of UnmapMainImage 1 IoCs
pid Process 3408 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3408 wrote to memory of 4624 3408 Process not Found 89 PID 3408 wrote to memory of 4624 3408 Process not Found 89 PID 3408 wrote to memory of 4636 3408 Process not Found 90 PID 3408 wrote to memory of 4636 3408 Process not Found 90 PID 3408 wrote to memory of 4400 3408 Process not Found 91 PID 3408 wrote to memory of 4400 3408 Process not Found 91 PID 3408 wrote to memory of 4896 3408 Process not Found 92 PID 3408 wrote to memory of 4896 3408 Process not Found 92 PID 3408 wrote to memory of 2952 3408 Process not Found 93 PID 3408 wrote to memory of 2952 3408 Process not Found 93 PID 3408 wrote to memory of 960 3408 Process not Found 94 PID 3408 wrote to memory of 960 3408 Process not Found 94 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\7c0b7776d8e7e775fb646f2bf3c91c46.dll,#11⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
PID:5028
-
C:\Windows\system32\tabcal.exeC:\Windows\system32\tabcal.exe1⤵PID:4624
-
C:\Users\Admin\AppData\Local\KgDgCLleX\tabcal.exeC:\Users\Admin\AppData\Local\KgDgCLleX\tabcal.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
PID:4636
-
C:\Windows\system32\BdeUISrv.exeC:\Windows\system32\BdeUISrv.exe1⤵PID:4400
-
C:\Users\Admin\AppData\Local\ps3g\BdeUISrv.exeC:\Users\Admin\AppData\Local\ps3g\BdeUISrv.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
PID:4896
-
C:\Windows\system32\AtBroker.exeC:\Windows\system32\AtBroker.exe1⤵PID:2952
-
C:\Users\Admin\AppData\Local\43C\AtBroker.exeC:\Users\Admin\AppData\Local\43C\AtBroker.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
PID:960
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\43C\AtBroker.exe
- Size 90KB
- SHA256 ae7b1e298a6e38f0a3428151bfc5565ede50a8d98dafaa147b13cf89c61f2ddd
- MD5 30076e434a015bdf4c136e09351882cc
- SHA1 584c958a35e23083a0861421357405afd26d9a0c
- SHA512 675e310c2455acf9220735f34fa527afe87dac691e89cc0edc3c4659147e9fd223f96b7a3beea532047aa0ebc58880a7010343019a50aa73ce69a038e3592024
- SSDEEP 1536:To4xehkWhYULcid2bpS8r0sMCl9Mx07zLrwkkqz3q/Troh7YTVZPyOh+id+Uk9:M8vQc79vr0wPLrwkkCq/nEYTVZPy9id2
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\43C\UxTheme.dll
- Size 1.8MB
- SHA256 6098597b8235df47ef83d204c96f3056310691690796fb2fb187837db67d6f39
- MD5 e1869764e0d2e79ca1973f305fb88cfa
- SHA1 553ca6ac4c5e43d069b7b82cecd45b07cf981063
- SHA512 a35f1fa6ad9dd9c2466f40adb8f428b7b436c08216f3d0b62a53fd4c465192fc34594e726d6d53a410fa67511bf56600bbc6b1fc51d47d4a9dbd265db6d829dd
- SSDEEP 12288:0VI0W/TtlPLfJCm3WIYxJ9yK5IQ9PElOlidGAWilgm5Qq0nB6wtt4AenZ1:xfP7fWsK5z9A+WGAW+V5SB6Ct4bnb
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\KgDgCLleX\HID.DLL
- Size 1.8MB
- SHA256 9eccf2ac1cac8c0627a5a49f32327646540d11bd9665521b79264985adeea6b9
- MD5 d3612bc6eee20a2ff7cda0181c1a58b5
- SHA1 ddac83dabd84c2703264d37bb06e5b12fb16eb02
- SHA512 d4211df62162c1910abd224d161c1c0036542af07fab092c70faa3ed1747062712eafc22dd002af0ce205db9828facee8288c50ec5a5b203d8eb990e0e1f6e76
- SSDEEP 12288:JVI0W/TtlPLfJCm3WIYxJ9yK5IQ9PElOlidGAWilgm5Qq0nB6wtt4AenZ1:ofP7fWsK5z9A+WGAW+V5SB6Ct4bnb
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\KgDgCLleX\tabcal.exe
- Size 84KB
- SHA256 f31b4c751dbca276446119ba775787c3eb032da72eabcd40ad96a55826a3f33c
- MD5 40f4014416ff0cbf92a9509f67a69754
- SHA1 1798ff7324724a32c810e2075b11c09b41e4fede
- SHA512 646dfe4cfe90d068c3da4c35f7053bb0f57687875a0f3469c0683e707306e6a42b0baca3e944d78f9be5c564bb0600202c32c223a770f89d3e2b07a24673c259
- SSDEEP 1536:XVS+G/Xh6wJ/59qhwfhrJ4L1Y6pEGMne24cdfW2jbJK:XsL6oRFhrJ4G6J2eJcdfZbs
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\ps3g\BdeUISrv.exe
- Size 54KB
- SHA256 20b05c77f898be08737082e969b39f54fa39753c8c0a06142eb7ad5e0764a2db
- MD5 8595075667ff2c9a9f9e2eebc62d8f53
- SHA1 c48b54e571f05d4e21d015bb3926c2129f19191a
- SHA512 080dbcdd9234c07efe6cea4919ffa305fdc381ccebed9d1020dd6551b54e20e52387e62a344502fa4a85249defd0f9b506528b8dd34675bc9f51f664b8fc4d88
- SSDEEP 1536:mrerbXLILs3kr2In0glBQGsZapVIN+t4:TD8A3krDkGeaE+t4
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\ps3g\WTSAPI32.dll
- Size 1.8MB
- SHA256 ae0e4c90b8c07841001790b6caf1ed3eac1cae74bf0bdf244824c027be780099
- MD5 b02cdb5b656541cb78958d358d40dc6f
- SHA1 084ecd4932aa300c9d711f15ca3e49adc1fabb1f
- SHA512 ed2e305d379ca352027e497a6e2ea9faffcb0fac48f7961de763e5051d6cc70b7112b86c44d9cc4c84cd5a8aea40bf28095493ca5e5a7577e8c45e7d579c1800
- SSDEEP 12288:KVI0W/TtlPLfJCm3WIYxJ9yK5IQ9PElOlidGAWilgm5Qq0nB6wtt4AenZ1:XfP7fWsK5z9A+WGAW+V5SB6Ct4bnb
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\MICROS~1\Windows\STARTM~1\Programs\Startup\Btpzaqnqvnv.lnk
- Size 1KB
- SHA256 63fe54526deaf8292d3d23ebcf47a672f1d5b2305bc317428533e10a58e9a0b4
- MD5 f21166e7f65374f6120da87470359c0b
- SHA1 9a669feda974eb2c1c5d685d6aadd7319ede2e49
- SHA512 988074f9e7b5d44df3c347580bb32434b2a4d13d07454b29528883973ecf6b950a8d47e7eea40c2a752e6d2b925cf118e8c9b82d718ba0208053f275d45a6b8b
- MD5 SHA1 SHA512