Analysis
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max time kernel
144s -
max time network
151s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
07-04-2024 23:11
Behavioral task
behavioral1
Sample
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
Resource
win10v2004-20240226-en
General
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Target
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
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Size
424KB
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MD5
adde7a82f57387410210b34ebce305ca
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SHA1
416e571e09e4a713f5b8ea33a5b64da9990e1a17
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SHA256
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1
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SHA512
9aac8f21198c1e838cf4a6b69ff17f3b714ab72fa452ff001e02e5546a3d9cf68bc4848a2a59e7e7effb88f522aab82767d0740b6359bbf7bf927ef4e31968b2
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SSDEEP
3072:nQC+GXgmYA/npA+fkBEcBoUTqp8YVE83jy11BGWjyLmar5FCO3ztKSwni9JCa2i:nQqgmYA/npAJBBo4q2YXAyL1L3BYq
Malware Config
Signatures
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Detects executables containing base64 encoded User Agent 3 IoCs
Processes:
resource yara_rule behavioral1/memory/2540-24-0x0000000010000000-0x000000001004E000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2540-28-0x0000000010000000-0x000000001004E000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2540-36-0x0000000010000000-0x000000001004E000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent -
UPX dump on OEP (original entry point) 8 IoCs
Processes:
resource yara_rule behavioral1/memory/2620-13-0x0000000000400000-0x0000000000469000-memory.dmp UPX \??\c:\Program Files\xwevo\rzuwmuog.dll UPX behavioral1/memory/2540-21-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral1/memory/2540-22-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral1/memory/2540-23-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral1/memory/2540-24-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral1/memory/2540-28-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral1/memory/2540-36-0x0000000010000000-0x000000001004E000-memory.dmp UPX -
Deletes itself 1 IoCs
Processes:
asamj.exepid process 2620 asamj.exe -
Executes dropped EXE 2 IoCs
Processes:
asamj.exerzuwmuog.exepid process 2620 asamj.exe 2540 rzuwmuog.exe -
Loads dropped DLL 7 IoCs
Processes:
cmd.exeasamj.exerzuwmuog.exepid process 2044 cmd.exe 2044 cmd.exe 2620 asamj.exe 2540 rzuwmuog.exe 2540 rzuwmuog.exe 2540 rzuwmuog.exe 2540 rzuwmuog.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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Processes:
resource yara_rule behavioral1/memory/2960-0-0x0000000000400000-0x0000000000469000-memory.dmp upx behavioral1/memory/2960-2-0x0000000000400000-0x0000000000469000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asamj.exe upx behavioral1/memory/2620-13-0x0000000000400000-0x0000000000469000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
rzuwmuog.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\xwevo\\rzuwmuog.exe \"c:\\Program Files\\xwevo\\rzuwmuog.dll\",Compliance" rzuwmuog.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
rzuwmuog.exedescription ioc process File opened (read-only) \??\b: rzuwmuog.exe File opened (read-only) \??\i: rzuwmuog.exe File opened (read-only) \??\u: rzuwmuog.exe File opened (read-only) \??\x: rzuwmuog.exe File opened (read-only) \??\z: rzuwmuog.exe File opened (read-only) \??\a: rzuwmuog.exe File opened (read-only) \??\j: rzuwmuog.exe File opened (read-only) \??\k: rzuwmuog.exe File opened (read-only) \??\m: rzuwmuog.exe File opened (read-only) \??\t: rzuwmuog.exe File opened (read-only) \??\y: rzuwmuog.exe File opened (read-only) \??\e: rzuwmuog.exe File opened (read-only) \??\h: rzuwmuog.exe File opened (read-only) \??\l: rzuwmuog.exe File opened (read-only) \??\n: rzuwmuog.exe File opened (read-only) \??\p: rzuwmuog.exe File opened (read-only) \??\r: rzuwmuog.exe File opened (read-only) \??\g: rzuwmuog.exe File opened (read-only) \??\q: rzuwmuog.exe File opened (read-only) \??\s: rzuwmuog.exe File opened (read-only) \??\v: rzuwmuog.exe File opened (read-only) \??\w: rzuwmuog.exe File opened (read-only) \??\o: rzuwmuog.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
rzuwmuog.exedescription ioc process File opened for modification \??\PHYSICALDRIVE0 rzuwmuog.exe -
Drops file in Program Files directory 4 IoCs
Processes:
asamj.exedescription ioc process File created \??\c:\Program Files\xwevo\rzuwmuog.dll asamj.exe File created \??\c:\Program Files\xwevo\rzuwmuog.exe asamj.exe File opened for modification \??\c:\Program Files\xwevo\rzuwmuog.exe asamj.exe File opened for modification \??\c:\Program Files\xwevo asamj.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
rzuwmuog.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rzuwmuog.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rzuwmuog.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
rzuwmuog.exepid process 2540 rzuwmuog.exe 2540 rzuwmuog.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rzuwmuog.exedescription pid process Token: SeDebugPrivilege 2540 rzuwmuog.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exeasamj.exepid process 2960 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe 2620 asamj.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.execmd.exeasamj.exedescription pid process target process PID 2960 wrote to memory of 2044 2960 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 2960 wrote to memory of 2044 2960 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 2960 wrote to memory of 2044 2960 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 2960 wrote to memory of 2044 2960 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 2044 wrote to memory of 1056 2044 cmd.exe PING.EXE PID 2044 wrote to memory of 1056 2044 cmd.exe PING.EXE PID 2044 wrote to memory of 1056 2044 cmd.exe PING.EXE PID 2044 wrote to memory of 1056 2044 cmd.exe PING.EXE PID 2044 wrote to memory of 2620 2044 cmd.exe asamj.exe PID 2044 wrote to memory of 2620 2044 cmd.exe asamj.exe PID 2044 wrote to memory of 2620 2044 cmd.exe asamj.exe PID 2044 wrote to memory of 2620 2044 cmd.exe asamj.exe PID 2620 wrote to memory of 2540 2620 asamj.exe rzuwmuog.exe PID 2620 wrote to memory of 2540 2620 asamj.exe rzuwmuog.exe PID 2620 wrote to memory of 2540 2620 asamj.exe rzuwmuog.exe PID 2620 wrote to memory of 2540 2620 asamj.exe rzuwmuog.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2960 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\asamj.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:1056 -
C:\Users\Admin\AppData\Local\Temp\asamj.exeC:\Users\Admin\AppData\Local\Temp\\asamj.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2620 -
\??\c:\Program Files\xwevo\rzuwmuog.exe"c:\Program Files\xwevo\rzuwmuog.exe" "c:\Program Files\xwevo\rzuwmuog.dll",Compliance C:\Users\Admin\AppData\Local\Temp\asamj.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2540
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
424KB
MD546801bc54a7269e17f772498e9c4064c
SHA1e276be41e53f4d45fc67583cc0e374990892602b
SHA25650327d800411ec6d8b0d1eba8fdadafff70623d36c19ac9977b2e3da77210fe7
SHA512e623816353c79b42e0db66b0f3611dc1d858c7e904c6c1c71969e27c32667f47889098d8fdbb6e327dcab2fea36d6635d68d829ddf32cfc7ea48a436fd68f1b9
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Filesize
141KB
MD5b3aaa16bffc7dfbc95c5fc04daac53af
SHA150c2b94ad4b9ee5c0c8b9994f2388f1efec0fc81
SHA256e9fa5991fd0b30a8eb468b364926c3c3f73b20eca53b0b0a6870b938bed596e3
SHA51229ff308db09b33c1398c19d1f92fde491c160c5d10ecee22162f3013718cec494915fd61a0414b723c4e830aec5b6d0a3d09809a546fe534bf729e9437f5a9a5
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Filesize
43KB
MD551138beea3e2c21ec44d0932c71762a8
SHA18939cf35447b22dd2c6e6f443446acc1bf986d58
SHA2565ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124
SHA512794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d