f84850c07f50d03b693d8dce2285e3e264a1bd0a49861b600afcdf423b7718b1

General

Target

osn.exe
Size

426KB
MD5

7990a08facbe1c8c5a673aee28de308a
SHA1

940bf5f40d0dd3b47b732d66d9bfae33e01d5d0f
SHA256

5aabccffcd5fe39c601e91a3c84f24854ce3aacc07321c1a09054942ab7aaa41
SHA512

8598137aa03f6c5ef48b5d370e9ba0d51386660c9de00c9ec051710adae204e150b259a31adde2f1d64dc1bf94707d515629992dc62020a5db8fd1721450336d
SSDEEP

6144:yZDNxWGx7Dsgz5Z7aZgYvhzmi7UDXTKFtwIjH1VdRQ/vqkg1gEagdQH:zG7DZJaZgIhzmmUTKFTj1V7uikFg

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
460	google.exe
4356	google.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4916	netsh.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

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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7787bd67a92b047a61177111148878bc.exe	google.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7787bd67a92b047a61177111148878bc.exe	google.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\7787bd67a92b047a61177111148878bc = "\"C:\\ProgramData\\google.exe\" .."	google.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\7787bd67a92b047a61177111148878bc = "\"C:\\ProgramData\\google.exe\" .."	google.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	osn.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	osn.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 376 set thread context of 4872	376	osn.exe	81
PID 460 set thread context of 4356	460	google.exe	83

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	osn.exe
File created	C:\Windows\assembly\Desktop.ini	osn.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	osn.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 25 IoCs

pid	Process
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe
4356	google.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	376	osn.exe
Token: SeDebugPrivilege	460	google.exe
Token: SeDebugPrivilege	4356	google.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 376 wrote to memory of 4872	376	osn.exe	81
PID 4872 wrote to memory of 460	4872	osn.exe	82
PID 4872 wrote to memory of 460	4872	osn.exe	82
PID 4872 wrote to memory of 460	4872	osn.exe	82
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 460 wrote to memory of 4356	460	google.exe	83
PID 4356 wrote to memory of 4916	4356	google.exe	84
PID 4356 wrote to memory of 4916	4356	google.exe	84
PID 4356 wrote to memory of 4916	4356	google.exe	84

C:\Users\Admin\AppData\Local\Temp\osn.exe
"C:\Users\Admin\AppData\Local\Temp\osn.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:376
- C:\Users\Admin\AppData\Local\Temp\osn.exe
  C:\Users\Admin\AppData\Local\Temp\osn.exe
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\ProgramData\google.exe
    "C:\ProgramData\google.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:460
  - - C:\ProgramData\google.exe
      C:\ProgramData\google.exe
      4⤵
      Executes dropped EXE
      Drops startup file
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4356
    - - C:\Windows\SysWOW64\netsh.exe
        
        netsh firewall add allowedprogram "C:\ProgramData\google.exe" "google.exe" ENABLE
        5⤵
        Modifies Windows Firewall
        
        PID:4916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\google.exe

Filesize
426KB

MD5
7990a08facbe1c8c5a673aee28de308a

SHA1
940bf5f40d0dd3b47b732d66d9bfae33e01d5d0f

SHA256
5aabccffcd5fe39c601e91a3c84f24854ce3aacc07321c1a09054942ab7aaa41

SHA512
8598137aa03f6c5ef48b5d370e9ba0d51386660c9de00c9ec051710adae204e150b259a31adde2f1d64dc1bf94707d515629992dc62020a5db8fd1721450336d

Download Submit
C:\ProgramData\google.exe

Filesize
426KB

MD5
7990a08facbe1c8c5a673aee28de308a

SHA1
940bf5f40d0dd3b47b732d66d9bfae33e01d5d0f

SHA256
5aabccffcd5fe39c601e91a3c84f24854ce3aacc07321c1a09054942ab7aaa41

SHA512
8598137aa03f6c5ef48b5d370e9ba0d51386660c9de00c9ec051710adae204e150b259a31adde2f1d64dc1bf94707d515629992dc62020a5db8fd1721450336d

Download Submit
C:\ProgramData\google.exe

Filesize
426KB

MD5
7990a08facbe1c8c5a673aee28de308a

SHA1
940bf5f40d0dd3b47b732d66d9bfae33e01d5d0f

SHA256
5aabccffcd5fe39c601e91a3c84f24854ce3aacc07321c1a09054942ab7aaa41

SHA512
8598137aa03f6c5ef48b5d370e9ba0d51386660c9de00c9ec051710adae204e150b259a31adde2f1d64dc1bf94707d515629992dc62020a5db8fd1721450336d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\google.exe.log

Filesize
594B

MD5
51ac875eb708e015bc50f2bee1062ca7

SHA1
c3a32f66deb3272dc6f26443813294c6d156ecf9

SHA256
44eb523a35bf63adcf05fd6a67981adf0d427c80d04fe76ce164805d1f4b7518

SHA512
e394c11bffdfe0ef256a5fa72205a91fd12341ad61b12d1c9858d0702cb7f627e4af888b8c7cfaaceb7356731f101e04c02f7e9d36b2c47a826321cfef953f19

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\osn.exe.log

Filesize
594B

MD5
51ac875eb708e015bc50f2bee1062ca7

SHA1
c3a32f66deb3272dc6f26443813294c6d156ecf9

SHA256
44eb523a35bf63adcf05fd6a67981adf0d427c80d04fe76ce164805d1f4b7518

SHA512
e394c11bffdfe0ef256a5fa72205a91fd12341ad61b12d1c9858d0702cb7f627e4af888b8c7cfaaceb7356731f101e04c02f7e9d36b2c47a826321cfef953f19

Download Submit
memory/376-136-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/376-132-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/460-142-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/460-147-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4356-149-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4356-150-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4872-137-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4872-141-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4872-134-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

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Analysis

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