eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489

Analysis

max time kernel
152s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/09/2022, 04:18

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe
Size

87KB
MD5

c25fb94942b3326caae687781f4e67c2
SHA1

026c6e172ca5a8b6aa16b10b411f5c40dd0f43c6
SHA256

eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489
SHA512

00d912ad55f20e64b7f063a5ca39dbadae4ef7f7b8be05ecd14ab64d6336e5db0f66c18febc562ba5a0e898215a4b0ace0271e3f96254fa70fdc100e3f9e0ac5
SSDEEP

1536:Pbi5LqQpHnuhmUC0qQuB0ReWxyVZ9z91LEyUwV:PeLqIB0ReWxUzL/

Score

8^/10

evasion persistence

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

flow	pid	Process
7	1728	Rundll32.exe

Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489

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	Rundll32.exe

Loads dropped DLL 3 IoCs

pid	Process
4388	Rundll32.exe
1728	Rundll32.exe
1728	Rundll32.exe

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Windows\\system32\\system.exe"	Rundll32.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	Rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\tjfwjfaa.dll	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe
File created	C:\Windows\SysWOW64\rsqbjfaa.dll	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\KAV\CDriver.sys	Rundll32.exe

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1636	sc.exe
3408	sc.exe
4296	sc.exe

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

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
4388	Rundll32.exe
1728	Rundll32.exe
1728	Rundll32.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
648	Process not Found

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 4388	1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe	79
PID 1260 wrote to memory of 4388	1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe	79
PID 1260 wrote to memory of 4388	1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe	79
PID 4388 wrote to memory of 1992	4388	Rundll32.exe	80
PID 4388 wrote to memory of 1992	4388	Rundll32.exe	80
PID 4388 wrote to memory of 1992	4388	Rundll32.exe	80
PID 4388 wrote to memory of 4852	4388	Rundll32.exe	81
PID 4388 wrote to memory of 4852	4388	Rundll32.exe	81
PID 4388 wrote to memory of 4852	4388	Rundll32.exe	81
PID 4388 wrote to memory of 1636	4388	Rundll32.exe	82
PID 4388 wrote to memory of 1636	4388	Rundll32.exe	82
PID 4388 wrote to memory of 1636	4388	Rundll32.exe	82
PID 4388 wrote to memory of 3408	4388	Rundll32.exe	86
PID 4388 wrote to memory of 3408	4388	Rundll32.exe	86
PID 4388 wrote to memory of 3408	4388	Rundll32.exe	86
PID 1992 wrote to memory of 4364	1992	net.exe	89
PID 1992 wrote to memory of 4364	1992	net.exe	89
PID 1992 wrote to memory of 4364	1992	net.exe	89
PID 4852 wrote to memory of 4392	4852	net.exe	88
PID 4852 wrote to memory of 4392	4852	net.exe	88
PID 4852 wrote to memory of 4392	4852	net.exe	88
PID 4388 wrote to memory of 4296	4388	Rundll32.exe	90
PID 4388 wrote to memory of 4296	4388	Rundll32.exe	90
PID 4388 wrote to memory of 4296	4388	Rundll32.exe	90
PID 1260 wrote to memory of 1728	1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe	92
PID 1260 wrote to memory of 1728	1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe	92
PID 1260 wrote to memory of 1728	1260	eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe	92

C:\Users\Admin\AppData\Local\Temp\eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe
"C:\Users\Admin\AppData\Local\Temp\eae7bb76084d796a253cd8b55da8c3f60c1a38fbc3d4740ab3ffbf9abe309489.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Windows\SysWOW64\Rundll32.exe
  Rundll32 C:\Windows\system32\tjfwjfaa.dll Exucute
  2⤵
  - Checks computer location settings
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4388
- - C:\Windows\SysWOW64\net.exe
    net stop WinDefend
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1992
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop WinDefend
      4⤵
      PID:4364
- - C:\Windows\SysWOW64\net.exe
    net stop MpsSvc
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4852
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop MpsSvc
      4⤵
      PID:4392
- - C:\Windows\SysWOW64\sc.exe
    sc config WinDefend start= disabled
    3⤵
    - Launches sc.exe
    PID:1636
- - C:\Windows\SysWOW64\sc.exe
    sc config MpsSvc start= disabled
    3⤵
    - Launches sc.exe
    PID:3408
- - C:\Windows\SysWOW64\sc.exe
    "C:\Windows\System32\sc.exe" stop PolicyAgent
    3⤵
    - Launches sc.exe
    PID:4296
- C:\Windows\SysWOW64\Rundll32.exe
  Rundll32 C:\Windows\system32\rsqbjfaa.dll Exucute
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Adds Run key to start application
  - Enumerates connected drives
  - Suspicious behavior: EnumeratesProcesses
  PID:1728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Impair Defenses

T1562

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\ECA7.tmp

Filesize
4.3MB

MD5
6c7cdd25c2cb0073306eb22aebfc663f

SHA1
a1eba8ab49272b9852fe6a543677e8af36271248

SHA256
58280e3572333f97a7cf9f33e8d31dc26a98b6535965ebd0bde82249fc9bf705

SHA512
17344e07b9e9b2cd6ae4237d7f310732462f9cbb8656883607d7a1a4090e869265f92a6da1718dee50b1375b91583de60c6bd9e7e8db6b6e45e33f4b894365d6

Download Submit
C:\Windows\SysWOW64\rsqbjfaa.dll

Filesize
21KB

MD5
1627a8e254901a9604addaf5e14473f2

SHA1
0307dca0863f1b02f3f6fb8393c166285d80983b

SHA256
1831fe4906497d1d8f09c1cb93d6f80559259c29f07e50bc43828f0304e1a913

SHA512
2f0da8ddcb9e0505a8ccf08b189727be2f7324a3598edafd3bf055df60e1dc46fead5946d20210619199881069da049dbfcc78e5082a0b89048173c9c7cdd603

Download Submit
C:\Windows\SysWOW64\rsqbjfaa.dll

Filesize
21KB

MD5
1627a8e254901a9604addaf5e14473f2

SHA1
0307dca0863f1b02f3f6fb8393c166285d80983b

SHA256
1831fe4906497d1d8f09c1cb93d6f80559259c29f07e50bc43828f0304e1a913

SHA512
2f0da8ddcb9e0505a8ccf08b189727be2f7324a3598edafd3bf055df60e1dc46fead5946d20210619199881069da049dbfcc78e5082a0b89048173c9c7cdd603

Download Submit
C:\Windows\SysWOW64\tjfwjfaa.dll

Filesize
61KB

MD5
81fe4fab769454c9f3ae5c0738a01caf

SHA1
de804adb98f37aa32b270e7ceebd6aa50c058bb1

SHA256
34818d6c3335477ceb1c2e8d5448408acd9bf53cb48a570ad9f2a49664526959

SHA512
114799cb47ec463081d6fe8d11828c5d11042f823f5fe9ce15f3a4220250a01c48f0645bfae45149ed5d41d59075ff282b7279e2388b793f6422c7f70c0337f0

Download Submit
C:\Windows\SysWOW64\tjfwjfaa.dll

Filesize
61KB

MD5
81fe4fab769454c9f3ae5c0738a01caf

SHA1
de804adb98f37aa32b270e7ceebd6aa50c058bb1

SHA256
34818d6c3335477ceb1c2e8d5448408acd9bf53cb48a570ad9f2a49664526959

SHA512
114799cb47ec463081d6fe8d11828c5d11042f823f5fe9ce15f3a4220250a01c48f0645bfae45149ed5d41d59075ff282b7279e2388b793f6422c7f70c0337f0

Download Submit