Analysis
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max time kernel
149s -
max time network
151s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
16-05-2024 01:42
Static task
static1
Behavioral task
behavioral1
Sample
a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe
Resource
win10v2004-20240508-en
General
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Target
a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe
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Size
159KB
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MD5
ace1deab1fde445e65b7f6a6b1bf2e47
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SHA1
fc6286b9b0b5d55ffc10a045dd7cb652de6103bf
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SHA256
a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979
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SHA512
a440adbcd47c775c047f409655edba4e19190bd1f5dbd20b1af82212474ad6fbae153984b241e0627e73cf23f20521e435ad37c6e39e5d9f794d97a5cc4d58b7
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SSDEEP
3072:x7qLZmhWAc+eB1zQavj53G2pPH+knVojoA8HBoJgTWVM:xQAPevzQav122xjVAZ8mGTB
Malware Config
Signatures
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Detects executables containing base64 encoded User Agent 7 IoCs
resource yara_rule behavioral1/memory/2240-9-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2240-11-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2240-10-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2240-13-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2240-17-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2240-18-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral1/memory/2240-19-0x0000000010000000-0x0000000010027000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent -
Blocklisted process makes network request 10 IoCs
flow pid Process 3 2240 rundll32.exe 7 2240 rundll32.exe 8 2240 rundll32.exe 9 2240 rundll32.exe 10 2240 rundll32.exe 13 2240 rundll32.exe 14 2240 rundll32.exe 15 2240 rundll32.exe 17 2240 rundll32.exe 18 2240 rundll32.exe -
resource yara_rule behavioral1/files/0x0035000000015c93-6.dat aspack_v212_v242 -
Deletes itself 1 IoCs
pid Process 2424 ymkhc.exe -
Executes dropped EXE 1 IoCs
pid Process 2424 ymkhc.exe -
Loads dropped DLL 3 IoCs
pid Process 3064 cmd.exe 3064 cmd.exe 2240 rundll32.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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\txfsq\\ztdrcwxs.trz\",SHA1" rundll32.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\u: rundll32.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.
description ioc Process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 1752 PING.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe 2240 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2240 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2960 a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe 2424 ymkhc.exe -
Suspicious use of WriteProcessMemory 19 IoCs
description pid Process procid_target PID 2960 wrote to memory of 3064 2960 a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe 28 PID 2960 wrote to memory of 3064 2960 a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe 28 PID 2960 wrote to memory of 3064 2960 a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe 28 PID 2960 wrote to memory of 3064 2960 a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe 28 PID 3064 wrote to memory of 1752 3064 cmd.exe 30 PID 3064 wrote to memory of 1752 3064 cmd.exe 30 PID 3064 wrote to memory of 1752 3064 cmd.exe 30 PID 3064 wrote to memory of 1752 3064 cmd.exe 30 PID 3064 wrote to memory of 2424 3064 cmd.exe 31 PID 3064 wrote to memory of 2424 3064 cmd.exe 31 PID 3064 wrote to memory of 2424 3064 cmd.exe 31 PID 3064 wrote to memory of 2424 3064 cmd.exe 31 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32 PID 2424 wrote to memory of 2240 2424 ymkhc.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe"C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.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\\ymkhc.exe "C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3064 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:1752
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C:\Users\Admin\AppData\Local\Temp\ymkhc.exeC:\Users\Admin\AppData\Local\Temp\\ymkhc.exe "C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2424 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\txfsq\ztdrcwxs.trz",SHA1 C:\Users\Admin\AppData\Local\Temp\ymkhc.exe4⤵
- Blocklisted process makes network request
- 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:2240
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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
159KB
MD55e0dec23ae6bfcfe5c2527bc5be00ec1
SHA161dc8f71019d941bf1ba015128c1d361d43609c9
SHA256191457169461c871319ed2f012e64fd35c96b2b56c6b563e09f1eaf7fab92818
SHA5122cc922c896eb9b8a08d9871223a1798021afaa27b43d00f7d563157862bd8c070bcde44872a82a88434c9aff579aae697d40dd9cbc16941c16eaf1b86f5b8d21
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Filesize
83KB
MD54993bd7ca91574843d5a608c532151a4
SHA172ff0d8e4ccee88738b3ab8bdb52b9474e0ef55e
SHA256489855558b5a997477f7c95a05e7adcbf6001e06bd80e29b01fdabdb006cdbbb
SHA51213418193723dace324d5b91a8162a09521640bc6e401c841bb0644de8ec9a762912f2afd588be8845a30b2f59ac10ab2eaa0b356068d1503792a30a826ed075c