defe5a24ac909cc14b06b49ea8574ee1bc964569bf1d18d56d3dd4398daffcde

General

Target
357e95c47c4b8666b0fe33277a37f376.exe
Size 504KB
Sample210622-sr3yjdnbk2
SHA256 defe5a24ac909cc14b06b49ea8574ee1bc964569bf1d18d56d3dd4398daffcde
MD5 357e95c47c4b8666b0fe33277a37f376
SHA1 543f4046f7baf2b26f91ed7478dfac8e8ec160a2
SHA512 9d58d514d8c19371f7da11d9eef9da561c14619baaaf2c70271352a836806213fc473662d2c7abed8d0d8be1f70ab8f385ebe9d8339f81bf1563478337fe481f
MD5 SHA1 SHA512

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1300	systemver.exe
2084	systemver.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1912-116-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral2/memory/1912-118-0x0000000000400000-0x000000000041C000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\Systemver = "C:\\Users\\Admin\\AppData\\Roaming\\systemver.exe"	systemver.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1892 set thread context of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1300 set thread context of 2084	1300	systemver.exe	81

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1892	357e95c47c4b8666b0fe33277a37f376.exe
1300	systemver.exe
2084	systemver.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1892 wrote to memory of 1912	1892	357e95c47c4b8666b0fe33277a37f376.exe	75
PID 1912 wrote to memory of 1300	1912	357e95c47c4b8666b0fe33277a37f376.exe	80
PID 1912 wrote to memory of 1300	1912	357e95c47c4b8666b0fe33277a37f376.exe	80
PID 1912 wrote to memory of 1300	1912	357e95c47c4b8666b0fe33277a37f376.exe	80
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81
PID 1300 wrote to memory of 2084	1300	systemver.exe	81

C:\Users\Admin\AppData\Local\Temp\357e95c47c4b8666b0fe33277a37f376.exe
"C:\Users\Admin\AppData\Local\Temp\357e95c47c4b8666b0fe33277a37f376.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1892
- C:\Users\Admin\AppData\Local\Temp\357e95c47c4b8666b0fe33277a37f376.exe
  "C:\Users\Admin\AppData\Local\Temp\357e95c47c4b8666b0fe33277a37f376.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\Users\Admin\AppData\Roaming\systemver.exe
    "C:\Users\Admin\AppData\Roaming\systemver.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1300
  - - C:\Users\Admin\AppData\Roaming\systemver.exe
      "C:\Users\Admin\AppData\Roaming\systemver.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:2084

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

Loading Replay Monitor...

Downloads

memory/1912-116-0x0000000000400000-0x000000000041C000-memory.dmp

Download

memory/1912-118-0x0000000000400000-0x000000000041C000-memory.dmp