a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5

General

Target

a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe
Size

102KB
MD5

a7591dfb57df7926c9e081bc71b79b6a
SHA1

0d294dfc85b2fff024743da49d54926d6340392a
SHA256

a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5
SHA512

37f26ec7dd00154ac0f8bb28fef9eae506867debc0ec401693e5e304e4b0679c5f6f4216a36e953b854e25d3cac361968c7d5da038bb85f67fff1729dd74cfc4
SSDEEP

1536:MIm5q1G27NKjwO5rF1EhByNLjXXXXXXHP2HmAXwVlQJHCBiIthuDf:zm+Kjwyr3EByNHYmAXwMiU+m

Score

8^/10

discovery exploit

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

632 takeown.exe
1324 icacls.exe
Deletes itself 1 IoCs

Processes:

regsvr32.exe

pid process

1820 regsvr32.exe
Loads dropped DLL 1 IoCs

Processes:

regsvr32.exe

pid process

1820 regsvr32.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

632 takeown.exe
1324 icacls.exe

pid	process
632	takeown.exe
1324	icacls.exe

pid	process
1820	regsvr32.exe

pid	process
1820	regsvr32.exe

pid	process
632	takeown.exe
1324	icacls.exe

Drops file in System32 directory 3 IoCs

Processes:

regsvr32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\apa.dll	regsvr32.exe
File created	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe
File opened for modification	C:\Windows\SysWOW64\rpcss.dll	regsvr32.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 4 IoCs

Processes:

regsvr32.exe

pid process

1820 regsvr32.exe
1820 regsvr32.exe
1820 regsvr32.exe
1820 regsvr32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

regsvr32.exetakeown.exe

description pid process

Token: SeDebugPrivilege 1820 regsvr32.exe
Token: SeTakeOwnershipPrivilege 632 takeown.exe

pid	process
1820	regsvr32.exe
1820	regsvr32.exe
1820	regsvr32.exe
1820	regsvr32.exe

description	pid	process
Token: SeDebugPrivilege	1820	regsvr32.exe
Token: SeTakeOwnershipPrivilege	632	takeown.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exeregsvr32.exe

description	pid	process	target process
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1664 wrote to memory of 1820	1664	a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe	regsvr32.exe
PID 1820 wrote to memory of 632	1820	regsvr32.exe	takeown.exe
PID 1820 wrote to memory of 632	1820	regsvr32.exe	takeown.exe
PID 1820 wrote to memory of 632	1820	regsvr32.exe	takeown.exe
PID 1820 wrote to memory of 632	1820	regsvr32.exe	takeown.exe
PID 1820 wrote to memory of 1324	1820	regsvr32.exe	icacls.exe
PID 1820 wrote to memory of 1324	1820	regsvr32.exe	icacls.exe
PID 1820 wrote to memory of 1324	1820	regsvr32.exe	icacls.exe
PID 1820 wrote to memory of 1324	1820	regsvr32.exe	icacls.exe
PID 1820 wrote to memory of 604	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 604	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 680	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 680	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 756	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 756	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 816	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 816	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 852	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 852	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 884	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 884	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 292	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 292	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 1088	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 1088	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 536	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 536	1820	regsvr32.exe	svchost.exe
PID 1820 wrote to memory of 1640	1820	regsvr32.exe	cmd.exe
PID 1820 wrote to memory of 1640	1820	regsvr32.exe	cmd.exe
PID 1820 wrote to memory of 1640	1820	regsvr32.exe	cmd.exe
PID 1820 wrote to memory of 1640	1820	regsvr32.exe	cmd.exe

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
1⤵
PID:756

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k RPCSS
1⤵
PID:680

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs
1⤵
PID:884

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
1⤵
PID:1088

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
1⤵
PID:536

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k NetworkService
1⤵
PID:292

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService
1⤵
PID:852

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
1⤵
PID:816

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch
1⤵
PID:604

C:\Users\Admin\AppData\Local\Temp\a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe
"C:\Users\Admin\AppData\Local\Temp\a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1664

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\system32\regsvr32.exe" /s C:\Users\Admin\AppData\Local\Temp\6c24c1~.tmp ,C:\Users\Admin\AppData\Local\Temp\a29223d6d22ebbfc9ff68bc41af05b3509843a390b1e3f1a883b829f4007e1b5.exe
2⤵
- Deletes itself
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820

C:\Windows\SysWOW64\takeown.exe
takeown /f "C:\Windows\system32\rpcss.dll"
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:632

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Windows\system32\rpcss.dll" /grant administrators:F
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1324

C:\Windows\SysWOW64\cmd.exe
cmd /c del %%SystemRoot%%\system32\rpcss.dll~*
3⤵
PID:1640

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

1

T1222

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\6c24c1~.tmp

Filesize
960KB

MD5
4fcda51d0638eaefde8562ec2a44ed11

SHA1
9d4f9c78f06e85f53ae8acec0b5e433e0203569a

SHA256
84172de4b1d0eeb8fb22e77c6ac8f32c203c37eff65b6a1894296ecf30278cbc

SHA512
655b796ac553a2dd6fc53188c74c88aa4fc32865a2842e30330b11c1c4d51ae59774be7254ca207257b32b971942bbc31c46f841ea60f2f5b2870cabedbc79af

Download Submit
\Users\Admin\AppData\Local\Temp\6c24c1~.tmp

Filesize
960KB

MD5
4fcda51d0638eaefde8562ec2a44ed11

SHA1
9d4f9c78f06e85f53ae8acec0b5e433e0203569a

SHA256
84172de4b1d0eeb8fb22e77c6ac8f32c203c37eff65b6a1894296ecf30278cbc

SHA512
655b796ac553a2dd6fc53188c74c88aa4fc32865a2842e30330b11c1c4d51ae59774be7254ca207257b32b971942bbc31c46f841ea60f2f5b2870cabedbc79af

Download Submit
memory/632-59-0x0000000000000000-mapping.dmp

Download
memory/1324-60-0x0000000000000000-mapping.dmp

Download
memory/1640-70-0x0000000000000000-mapping.dmp

Download
memory/1664-54-0x0000000074AD1000-0x0000000074AD3000-memory.dmp

Filesize
8KB

Download
memory/1820-55-0x0000000000000000-mapping.dmp

Download

Analysis

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