a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503

General

Target

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
Size

168KB
MD5

56c26804bd92f62fb5efbe7e36be899a
SHA1

15a51e7a08d9041b38679f2ea9dd1d1c75310a76
SHA256

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503
SHA512

3038259e094dce5e2ba0ea784fdb417a3c96f422daa99ed751bbfdd863eecdd23c8fed24da28ca7a2ae13da8cd9d7d9bfbbdba615d3434d15484724475554496
SSDEEP

3072:ShGs8/p+Y7SIsyvTlo/11hJl2czGRqxZdxxW974+:ShGD/p+YiQlS1NJG6/xI

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exekaumu.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	kaumu.exe

Executes dropped EXE 1 IoCs

Processes:

kaumu.exe

pid process

4660 kaumu.exe

pid	process
4660	kaumu.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe

Adds Run key to start application 2 TTPs 54 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

kaumu.exea7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /L"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /f"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /i"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /j"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /Y"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /h"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /A"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /R"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /K"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /P"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /b"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /C"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /V"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /O"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /q"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /u"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /T"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /W"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /J"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /I"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /e"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /z"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /t"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /M"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /d"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /x"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /E"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /D"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /r"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /F"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /a"	kaumu.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /g"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /w"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /y"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /B"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /Z"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /l"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /N"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /S"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /v"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /k"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /Q"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /c"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /s"	kaumu.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /U"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /H"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /g"	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /m"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /o"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /n"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /p"	kaumu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kaumu = "C:\\Users\\Admin\\kaumu.exe /G"	kaumu.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exekaumu.exe

pid	process
384	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
384	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe
4660	kaumu.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exekaumu.exe

pid process

384 a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
4660 kaumu.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe

description	pid	process	target process
PID 384 wrote to memory of 4660	384	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe	kaumu.exe
PID 384 wrote to memory of 4660	384	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe	kaumu.exe
PID 384 wrote to memory of 4660	384	a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe	kaumu.exe

C:\Users\Admin\AppData\Local\Temp\a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe
"C:\Users\Admin\AppData\Local\Temp\a7bd94a54b75f6d3e8a0cb81140da05b51eebf65e59bd82fec7c4c55fe20c503.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:384

C:\Users\Admin\kaumu.exe
"C:\Users\Admin\kaumu.exe"
2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4660

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\kaumu.exe
Filesize
168KB

MD5
4a98cbd37e2cc97293a4ee35631d747d

SHA1
3e73873b45e4c5fa7f65ee58806ac3c9f058a68c

SHA256
e912309ed20327a5adacb472e66494fdb7de138f70faf5ad155b4bb58569a71d

SHA512
8a190f00b5304d6b90481819f393ca0c80118f99e7158a41d75cf50567a37074a431ef84be0e99de02a8ff05593cde2e3bcf5d61d0b5380697094f62c9f2745b

Download Submit
C:\Users\Admin\kaumu.exe
Filesize
168KB

MD5
4a98cbd37e2cc97293a4ee35631d747d

SHA1
3e73873b45e4c5fa7f65ee58806ac3c9f058a68c

SHA256
e912309ed20327a5adacb472e66494fdb7de138f70faf5ad155b4bb58569a71d

SHA512
8a190f00b5304d6b90481819f393ca0c80118f99e7158a41d75cf50567a37074a431ef84be0e99de02a8ff05593cde2e3bcf5d61d0b5380697094f62c9f2745b

Download Submit
memory/4660-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads