Analysis
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max time kernel
141s -
max time network
135s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
27-07-2021 15:28
Static task
static1
Behavioral task
behavioral1
Sample
Images.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
Images.exe
Resource
win10v20210410
General
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Target
Images.exe
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Size
973KB
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MD5
82489381d072392f3075161bbb1ec8b8
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SHA1
5ac44b1ad6d31f14e22013792aed5033af1bed97
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SHA256
2307054debb98d7c9ca5b5fbce5ca1210c49563dbe01d2fa28cc24099a2db022
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SHA512
e53d7c446b87211327033139b6d0b539ed7aa0d2db660eaa44ad3d96499a03a26e96a887c47250c7ee685ae7a7bd3cc71aa49097c10ba6371f928a2cdf2c402d
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
smtp.nuntai-tw.com - Port:
587 - Username:
greta@nuntai-tw.com - Password:
tanga333
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 3 IoCs
Processes:
resource yara_rule behavioral2/memory/1236-127-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral2/memory/1236-128-0x0000000000436CFE-mapping.dmp family_agenttesla behavioral2/memory/1236-134-0x0000000005270000-0x000000000576E000-memory.dmp family_agenttesla -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Images.exedescription pid process target process PID 4048 set thread context of 1236 4048 Images.exe Images.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Images.exepid process 1236 Images.exe 1236 Images.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Images.exeImages.exedescription pid process Token: SeDebugPrivilege 4048 Images.exe Token: SeDebugPrivilege 1236 Images.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
Images.exedescription pid process target process PID 4048 wrote to memory of 4068 4048 Images.exe schtasks.exe PID 4048 wrote to memory of 4068 4048 Images.exe schtasks.exe PID 4048 wrote to memory of 4068 4048 Images.exe schtasks.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe PID 4048 wrote to memory of 1236 4048 Images.exe Images.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Images.exe"C:\Users\Admin\AppData\Local\Temp\Images.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\THigGvOw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp888A.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Images.exe"C:\Users\Admin\AppData\Local\Temp\Images.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Images.exe.logMD5
90acfd72f14a512712b1a7380c0faf60
SHA140ba4accb8faa75887e84fb8e38d598dc8cf0f12
SHA25620806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86
SHA51229dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9
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C:\Users\Admin\AppData\Local\Temp\tmp888A.tmpMD5
58b445ff6ec786da9db0005454c66e1e
SHA124e733b99d95f6effdd1fe652733cbbcf305eb10
SHA2568de6ca30ef6619b639fb9e20721bdd295885484f5af52a9a881eb4a753adefbb
SHA5127f8c915a832e7861920d16af61be3db7f5efc1ee825ae4df8bfdfe721639c51359731d558b98efeee163a11b556b8131f6dad3d348ad6f1011fe4efac905714b
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memory/1236-136-0x0000000005FD0000-0x0000000005FD1000-memory.dmpFilesize
4KB
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memory/1236-135-0x00000000056E0000-0x00000000056E1000-memory.dmpFilesize
4KB
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memory/1236-134-0x0000000005270000-0x000000000576E000-memory.dmpFilesize
5.0MB
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memory/1236-128-0x0000000000436CFE-mapping.dmp
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memory/1236-127-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/4048-119-0x0000000005120000-0x0000000005121000-memory.dmpFilesize
4KB
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memory/4048-123-0x000000000ADE0000-0x000000000AE55000-memory.dmpFilesize
468KB
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memory/4048-124-0x0000000005200000-0x000000000523B000-memory.dmpFilesize
236KB
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memory/4048-122-0x0000000005260000-0x000000000528D000-memory.dmpFilesize
180KB
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memory/4048-121-0x00000000050A0000-0x000000000513C000-memory.dmpFilesize
624KB
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memory/4048-120-0x00000000053A0000-0x00000000053A1000-memory.dmpFilesize
4KB
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memory/4048-114-0x0000000000810000-0x0000000000811000-memory.dmpFilesize
4KB
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memory/4048-118-0x0000000005300000-0x0000000005301000-memory.dmpFilesize
4KB
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memory/4048-117-0x0000000005760000-0x0000000005761000-memory.dmpFilesize
4KB
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memory/4048-116-0x0000000005140000-0x0000000005141000-memory.dmpFilesize
4KB
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memory/4068-125-0x0000000000000000-mapping.dmp