025a59820a9d4864aac68959398967b67de3567fbc6865fed28fd50e6c844588

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31-12-2023 05:48

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General

Target

2a9c6866c54dada1b35d93dc1b4fda70.exe
Size

10KB
MD5

2a9c6866c54dada1b35d93dc1b4fda70
SHA1

dea25f93eef92f7b125b7e091002cf50f093e4f5
SHA256

025a59820a9d4864aac68959398967b67de3567fbc6865fed28fd50e6c844588
SHA512

2abdd652c7f5613f995c80a9ff56cd28db6cd44c0150aa52c4df34ccd75f3e43c58e9fb07193d1a7bb219fdf91dc44b6b24df72f183553a6fd1581240cf2e204
SSDEEP

192:Rywqv+F7pQtH5dWVJLD9popPzvKx1jRN6TDzi/6DGLdtYvZcLbf+OHTTFZ:I5g7pQtHDYLD0p2n+DO/I6YvObjzr

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Deletes itself 1 IoCs

pid	Process
2268	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2792	comboausk.exe

Loads dropped DLL 2 IoCs

pid	Process
2436	2a9c6866c54dada1b35d93dc1b4fda70.exe
2436	2a9c6866c54dada1b35d93dc1b4fda70.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2436-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0021000000015c63-3.dat	upx
behavioral1/memory/2436-4-0x0000000000030000-0x000000000003E000-memory.dmp	upx
behavioral1/memory/2436-11-0x0000000000030000-0x000000000003E000-memory.dmp	upx
behavioral1/memory/2792-12-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2436-20-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\comboaus.dll	2a9c6866c54dada1b35d93dc1b4fda70.exe
File created	C:\Windows\SysWOW64\comboausk.exe	2a9c6866c54dada1b35d93dc1b4fda70.exe
File opened for modification	C:\Windows\SysWOW64\comboausk.exe	2a9c6866c54dada1b35d93dc1b4fda70.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2436	2a9c6866c54dada1b35d93dc1b4fda70.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 2792	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	28
PID 2436 wrote to memory of 2792	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	28
PID 2436 wrote to memory of 2792	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	28
PID 2436 wrote to memory of 2792	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	28
PID 2436 wrote to memory of 2268	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	29
PID 2436 wrote to memory of 2268	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	29
PID 2436 wrote to memory of 2268	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	29
PID 2436 wrote to memory of 2268	2436	2a9c6866c54dada1b35d93dc1b4fda70.exe	29

C:\Users\Admin\AppData\Local\Temp\2a9c6866c54dada1b35d93dc1b4fda70.exe
"C:\Users\Admin\AppData\Local\Temp\2a9c6866c54dada1b35d93dc1b4fda70.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2436
- C:\Windows\SysWOW64\comboausk.exe
  C:\Windows\system32\comboausk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2792
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\2a9c6866c54dada1b35d93dc1b4fda70.exe.bat
  2⤵
  - Deletes itself
  PID:2268

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\2a9c6866c54dada1b35d93dc1b4fda70.exe.bat

Filesize
182B

MD5
5a332eb591d52894682088ec5ad6a031

SHA1
43445b7badfd771e534703797bfdfcacb8bc6dc1

SHA256
ba6840457c8a916d363b5c710a8ec5797391b20f46d387ad462e20fa24b6f79d

SHA512
7bd5def3d99fea70fb92a4cb2e68dcf335e04151f755704d7641fed619c5944e228ecf9213d892ffc9ef316d492b85f55640d43fb4387233b8e57fa4082f1bbf

Download Submit
\Windows\SysWOW64\comboausk.exe

Filesize
10KB

MD5
2a9c6866c54dada1b35d93dc1b4fda70

SHA1
dea25f93eef92f7b125b7e091002cf50f093e4f5

SHA256
025a59820a9d4864aac68959398967b67de3567fbc6865fed28fd50e6c844588

SHA512
2abdd652c7f5613f995c80a9ff56cd28db6cd44c0150aa52c4df34ccd75f3e43c58e9fb07193d1a7bb219fdf91dc44b6b24df72f183553a6fd1581240cf2e204

Download Submit
memory/2436-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2436-4-0x0000000000030000-0x000000000003E000-memory.dmp

Filesize
56KB

Download
memory/2436-11-0x0000000000030000-0x000000000003E000-memory.dmp

Filesize
56KB

Download
memory/2436-20-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2792-12-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download