d1623332c586135747a2575bec4ee783f299c5fca0f527f0328ea47691e9506d

General

Target

ExcelViewerss.exe
Size

571KB
MD5

40d56ef0857cd5fe0ba21d20c73686e2
SHA1

90a8bdadbdebfcaf3a1e146472d56db7d531f921
SHA256

d1623332c586135747a2575bec4ee783f299c5fca0f527f0328ea47691e9506d
SHA512

74953fa8056f17e96831cf932a482907af00ef22008a4c829da339d3c55fb9696ba812c605155486971cdc4427cb85bf4d63f0e29ffdb46c602be083bdcdc038

Score

8^/10

upx

Malware Config

Signatures

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/932-119-0x0000000000400000-0x00000000004F6000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

Processes:

ExcelViewerss.exe

description pid process target process

PID 3016 set thread context of 932 3016 ExcelViewerss.exe ExcelViewerss.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: MapViewOfSection 1 IoCs

Processes:

ExcelViewerss.exe

pid process

3016 ExcelViewerss.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

ExcelViewerss.exe

pid process

932 ExcelViewerss.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ExcelViewerss.exe

description pid process

Token: SeShutdownPrivilege 932 ExcelViewerss.exe
Token: SeCreatePagefilePrivilege 932 ExcelViewerss.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ExcelViewerss.exe

pid process

3016 ExcelViewerss.exe

description	pid	process	target process
PID 3016 set thread context of 932	3016	ExcelViewerss.exe	ExcelViewerss.exe

pid	process
3016	ExcelViewerss.exe

pid	process
932	ExcelViewerss.exe

description	pid	process
Token: SeShutdownPrivilege	932	ExcelViewerss.exe
Token: SeCreatePagefilePrivilege	932	ExcelViewerss.exe

pid	process
3016	ExcelViewerss.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

ExcelViewerss.exeExcelViewerss.exe

description	pid	process	target process
PID 3016 wrote to memory of 932	3016	ExcelViewerss.exe	ExcelViewerss.exe
PID 3016 wrote to memory of 932	3016	ExcelViewerss.exe	ExcelViewerss.exe
PID 3016 wrote to memory of 932	3016	ExcelViewerss.exe	ExcelViewerss.exe
PID 3016 wrote to memory of 932	3016	ExcelViewerss.exe	ExcelViewerss.exe
PID 932 wrote to memory of 1164	932	ExcelViewerss.exe	cmd.exe
PID 932 wrote to memory of 1164	932	ExcelViewerss.exe	cmd.exe
PID 932 wrote to memory of 1164	932	ExcelViewerss.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe
"C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3016

C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe
"C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe"
2⤵
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:932

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\nJ3x4QfDj5RhAt3p.bat" "
3⤵
PID:1164

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nJ3x4QfDj5RhAt3p.bat
MD5
b3b091fc34f1311973172f9ff93b5ec1

SHA1
0265aa403f2c6656977abc00382ee75f11b92e73

SHA256
4730af9e595d9f8009cc9c133533945ff7605094bac94dea56fcf77efc5de300

SHA512
eeb04c4ca9640e4ef8191b9c5b999370355dee6594ebfd76e7824ddb02360ad8f8e7e7f591cd74a24f0d281e30293b528ba2df5ec4c0dc2c6109092fed37452f

Download Submit
memory/932-117-0x00000000004F4AD0-mapping.dmp

Download
memory/932-119-0x0000000000400000-0x00000000004F6000-memory.dmp

Filesize
984KB

Download
memory/932-120-0x0000000000500000-0x000000000064A000-memory.dmp

Filesize
1.3MB

Download
memory/1164-121-0x0000000000000000-mapping.dmp

Download
memory/3016-116-0x00000000021E0000-0x00000000021E1000-memory.dmp

Filesize
4KB

Download
memory/3016-118-0x00000000021F0000-0x00000000021F8000-memory.dmp

Filesize
32KB

Download

Analysis

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