591c9b81e7db60504efbdd41d6c6f67c62f6782bb514b7d80feaf36193be365c

General

Target

65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe
Size

243KB
MD5

f3c11989987acee8b271f571cdc7757c
SHA1

50a191d53bc397ce08af356a224135488ed23619
SHA256

65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7
SHA512

27e9690090d4d928140b0c6b34205371bd2c8cce8423308fff0fdbd1ebfec9b4b50538a226de73145598aa4f7d9153db67a21cebed00808466cf2a93b697a119
SSDEEP

3072:X9As+JFTpwVwFVSY9QziR0BEchY/VMaFWfC2UdG8zeIw0fuZb56RxokMUuncB:NAxFTpwCFkxBYRW3sZ33eYAk4Q

Score

8^/10

defense_evasion discovery

Malware Config

Signatures

System Binary Proxy Execution: Regsvcs/Regasm 1 TTPs 2 IoCs

Abuse Regasm to proxy execution of malicious code.

defense_evasion

Regsvcs/Regasm

T1218.009

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\regasm.exe	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe
Key opened	\Registry\Machine\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Custom\regasm.exe	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	regasm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4896 set thread context of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3800	4800	WerFault.exe	103

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regasm.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103
PID 4896 wrote to memory of 4800	4896	65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe	103

C:\Users\Admin\AppData\Local\Temp\65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe
"C:\Users\Admin\AppData\Local\Temp\65ac9daf3070161ac996fb8946632599547f1c9450d7dcd0f8dc1c85b4e8b3b7.exe"
1⤵
- System Binary Proxy Execution: Regsvcs/Regasm
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Users\Admin\AppData\Local\Temp\regasm.exe
  "C:\Users\Admin\AppData\Local\Temp\regasm.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4800
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4800 -s 544
    3⤵
    - Program crash
    PID:3800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4800 -ip 4800
1⤵
PID:1824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

System Binary Proxy Execution

1

T1218

Regsvcs/Regasm

1

T1218.009

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\regasm.exe

Filesize
2.5MB

MD5
0a7608db01cae07792cea95e792aa866

SHA1
71dff876e4d5edb6cea78fee7aa15845d4950e24

SHA256
c16336ab32195b08c1678220fbe0256fee865f623e2b32fcfa4d9825fd68977e

SHA512
990a6fa1b8adb6727b1dcd8931ad84fdcb556533b78f896a71eae2a7e3ae3222e4b8efaa4b629ced2841211750e0d8a75ddd546a983c2e586918dd8ba4e0dc42

Download Submit
memory/4800-9-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/4800-13-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/4800-15-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/4896-0-0x0000000074F6E000-0x0000000074F6F000-memory.dmp

Filesize
4KB

Download
memory/4896-1-0x0000000000E40000-0x0000000000E84000-memory.dmp

Filesize
272KB

Download
memory/4896-2-0x0000000005880000-0x000000000591C000-memory.dmp

Filesize
624KB

Download
memory/4896-3-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/4896-4-0x0000000005800000-0x0000000005820000-memory.dmp

Filesize
128KB

Download
memory/4896-5-0x0000000074F6E000-0x0000000074F6F000-memory.dmp

Filesize
4KB

Download
memory/4896-6-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/4896-17-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download

Analysis

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