b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942

General

Target

b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe
Size

44KB
MD5

3fb68181f7a494cc8e37ecd6a0cf693b
SHA1

4481093b4bb8170b7c1009251801cb5dca11dc64
SHA256

b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942
SHA512

3448fea8ac5c6373c268cfe63a1ff8a33ed3d2f222bbe65f734319beca6b8956da6f24a6292944227ee847b908840c9e8077f6f5ffe1487a117ec96dd88ce995
SSDEEP

768:IGt7C9Vm3xIfy/Gh6gqbsMcwa77wtMF0knYukA5zNNXCIwlgyymPyHmIjNDq:IGCVm3GpXA5cHwtMF0CYu357XxjvNm

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1676	System64.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{7880F99D-BC3G-14DF-89AS-1190DR808E85}	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{7880F99D-BC3G-14DF-89AS-1190DR808E85}\StubPath = "C:\\Windows\\system32\\System64.exe"	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b0000000122ef-55.dat	upx
behavioral1/files/0x000b0000000122ef-57.dat	upx
behavioral1/memory/948-58-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/files/0x000b0000000122ef-60.dat	upx
behavioral1/memory/380-67-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/380-65-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/380-62-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/1676-70-0x0000000000400000-0x0000000000423000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
948	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\System64.exe	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe
File opened for modification	C:\Windows\SysWOW64\System64.exe	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 380	1676	System64.exe	29

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 1 IoCs

pid	Process
1676	System64.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 948 wrote to memory of 1676	948	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe	28
PID 948 wrote to memory of 1676	948	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe	28
PID 948 wrote to memory of 1676	948	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe	28
PID 948 wrote to memory of 1676	948	b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe	28
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29
PID 1676 wrote to memory of 380	1676	System64.exe	29

C:\Users\Admin\AppData\Local\Temp\b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe
"C:\Users\Admin\AppData\Local\Temp\b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942.exe"
1⤵
- Modifies Installed Components in the registry
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:948
- C:\Windows\SysWOW64\System64.exe
  "C:\Windows\system32\System64.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1676
- - C:\Windows\SysWOW64\userinit.exe
    "C:\Windows\system32\userinit.exe"
    3⤵
    PID:380

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\System64.exe

Filesize
44KB

MD5
3fb68181f7a494cc8e37ecd6a0cf693b

SHA1
4481093b4bb8170b7c1009251801cb5dca11dc64

SHA256
b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942

SHA512
3448fea8ac5c6373c268cfe63a1ff8a33ed3d2f222bbe65f734319beca6b8956da6f24a6292944227ee847b908840c9e8077f6f5ffe1487a117ec96dd88ce995

Download Submit
C:\Windows\SysWOW64\System64.exe

Filesize
44KB

MD5
3fb68181f7a494cc8e37ecd6a0cf693b

SHA1
4481093b4bb8170b7c1009251801cb5dca11dc64

SHA256
b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942

SHA512
3448fea8ac5c6373c268cfe63a1ff8a33ed3d2f222bbe65f734319beca6b8956da6f24a6292944227ee847b908840c9e8077f6f5ffe1487a117ec96dd88ce995

Download Submit
\Windows\SysWOW64\System64.exe

Filesize
44KB

MD5
3fb68181f7a494cc8e37ecd6a0cf693b

SHA1
4481093b4bb8170b7c1009251801cb5dca11dc64

SHA256
b0a4879f2cdbddb7189095b821d55062818ee5a185533788dee0814307f9f942

SHA512
3448fea8ac5c6373c268cfe63a1ff8a33ed3d2f222bbe65f734319beca6b8956da6f24a6292944227ee847b908840c9e8077f6f5ffe1487a117ec96dd88ce995

Download Submit
memory/380-67-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/380-65-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/380-62-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/380-61-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/948-54-0x0000000075A31000-0x0000000075A33000-memory.dmp

Filesize
8KB

Download
memory/948-58-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/1676-70-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download

Analysis

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