8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca

Analysis

max time kernel
189s
max time network
212s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
05/12/2022, 12:46

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General

Target

8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe
Size

133KB
MD5

fbf5cb4b73ce813eb85a6ab501a84f6c
SHA1

1a9983754716d96e827377ccac96f5ec7e16f42f
SHA256

8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca
SHA512

ed825c4ddf0509a1fdaed7c2a2a23878ac95f26c3cf1a1295e782b51812bffcc054ceef084b0637bb090737e50e359c42ebd9c60cfc9958d13fc59232052eb9f
SSDEEP

1536:609kselPdFsYl5GDe3GeuKEZzwd1joWRv02rd9cqCmh6DY5atOXPQ6DYu8O/7f:60L65GaSu5oWRv0SJVPDkO/D

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1584	xhwtqgaa.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	Rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
1888	Rundll32.exe
1584	xhwtqgaa.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"	xhwtqgaa.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\tlbongaa.dll	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe
File created	C:\Windows\SysWOW64\xhwtqgaa.exe	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe

Drops file in Program Files directory 1 IoCs

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

Launches sc.exe 7 IoCs

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

pid	Process
2184	sc.exe
3728	sc.exe
532	sc.exe
2920	sc.exe
4144	sc.exe
3128	sc.exe
4652	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 14 IoCs

pid	Process
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe
1888	Rundll32.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
648	Process not Found

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe

Suspicious use of WriteProcessMemory 57 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 1888	4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe	84
PID 4536 wrote to memory of 1888	4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe	84
PID 4536 wrote to memory of 1888	4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe	84
PID 1888 wrote to memory of 4432	1888	Rundll32.exe	85
PID 1888 wrote to memory of 4432	1888	Rundll32.exe	85
PID 1888 wrote to memory of 4432	1888	Rundll32.exe	85
PID 1888 wrote to memory of 2884	1888	Rundll32.exe	86
PID 1888 wrote to memory of 2884	1888	Rundll32.exe	86
PID 1888 wrote to memory of 2884	1888	Rundll32.exe	86
PID 1888 wrote to memory of 3728	1888	Rundll32.exe	90
PID 1888 wrote to memory of 3728	1888	Rundll32.exe	90
PID 1888 wrote to memory of 3728	1888	Rundll32.exe	90
PID 1888 wrote to memory of 2184	1888	Rundll32.exe	89
PID 1888 wrote to memory of 2184	1888	Rundll32.exe	89
PID 1888 wrote to memory of 2184	1888	Rundll32.exe	89
PID 1888 wrote to memory of 2920	1888	Rundll32.exe	94
PID 1888 wrote to memory of 2920	1888	Rundll32.exe	94
PID 1888 wrote to memory of 2920	1888	Rundll32.exe	94
PID 1888 wrote to memory of 532	1888	Rundll32.exe	93
PID 1888 wrote to memory of 532	1888	Rundll32.exe	93
PID 1888 wrote to memory of 532	1888	Rundll32.exe	93
PID 1888 wrote to memory of 4144	1888	Rundll32.exe	95
PID 1888 wrote to memory of 4144	1888	Rundll32.exe	95
PID 1888 wrote to memory of 4144	1888	Rundll32.exe	95
PID 1888 wrote to memory of 3128	1888	Rundll32.exe	98
PID 1888 wrote to memory of 3128	1888	Rundll32.exe	98
PID 1888 wrote to memory of 3128	1888	Rundll32.exe	98
PID 1888 wrote to memory of 4536	1888	Rundll32.exe	81
PID 1888 wrote to memory of 4536	1888	Rundll32.exe	81
PID 1888 wrote to memory of 4432	1888	Rundll32.exe	85
PID 1888 wrote to memory of 4432	1888	Rundll32.exe	85
PID 1888 wrote to memory of 2884	1888	Rundll32.exe	86
PID 1888 wrote to memory of 2884	1888	Rundll32.exe	86
PID 1888 wrote to memory of 3728	1888	Rundll32.exe	90
PID 1888 wrote to memory of 3728	1888	Rundll32.exe	90
PID 1888 wrote to memory of 2184	1888	Rundll32.exe	89
PID 1888 wrote to memory of 2184	1888	Rundll32.exe	89
PID 1888 wrote to memory of 2920	1888	Rundll32.exe	94
PID 1888 wrote to memory of 2920	1888	Rundll32.exe	94
PID 1888 wrote to memory of 532	1888	Rundll32.exe	93
PID 1888 wrote to memory of 532	1888	Rundll32.exe	93
PID 1888 wrote to memory of 4144	1888	Rundll32.exe	95
PID 1888 wrote to memory of 4144	1888	Rundll32.exe	95
PID 1888 wrote to memory of 3128	1888	Rundll32.exe	98
PID 1888 wrote to memory of 3128	1888	Rundll32.exe	98
PID 4432 wrote to memory of 4068	4432	net.exe	101
PID 4432 wrote to memory of 4068	4432	net.exe	101
PID 4432 wrote to memory of 4068	4432	net.exe	101
PID 2884 wrote to memory of 4088	2884	net.exe	102
PID 2884 wrote to memory of 4088	2884	net.exe	102
PID 2884 wrote to memory of 4088	2884	net.exe	102
PID 1888 wrote to memory of 4652	1888	Rundll32.exe	103
PID 1888 wrote to memory of 4652	1888	Rundll32.exe	103
PID 1888 wrote to memory of 4652	1888	Rundll32.exe	103
PID 4536 wrote to memory of 1584	4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe	105
PID 4536 wrote to memory of 1584	4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe	105
PID 4536 wrote to memory of 1584	4536	8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe	105

C:\Users\Admin\AppData\Local\Temp\8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe
"C:\Users\Admin\AppData\Local\Temp\8f2b449f573a92140a2c47097b7a3d74b75f7101daf36c538ed2ae2e766451ca.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\SysWOW64\Rundll32.exe
  Rundll32 C:\Windows\system32\tlbongaa.dll Exbcute
  2⤵
  - Checks computer location settings
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1888
- - C:\Windows\SysWOW64\net.exe
    net stop WinDefend
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4432
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop WinDefend
      4⤵
      PID:4068
- - C:\Windows\SysWOW64\net.exe
    net stop MpsSvc
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2884
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop MpsSvc
      4⤵
      PID:4088
- - C:\Windows\SysWOW64\sc.exe
    sc config MpsSvc start= disabled
    3⤵
    - Launches sc.exe
    PID:2184
- - C:\Windows\SysWOW64\sc.exe
    sc config WinDefend start= disabled
    3⤵
    - Launches sc.exe
    PID:3728
- - C:\Windows\SysWOW64\sc.exe
    sc delete ZhuDongFangYu
    3⤵
    - Launches sc.exe
    PID:532
- - C:\Windows\SysWOW64\sc.exe
    sc stop ZhuDongFangYu
    3⤵
    - Launches sc.exe
    PID:2920
- - C:\Windows\SysWOW64\sc.exe
    sc stop 360rp
    3⤵
    - Launches sc.exe
    PID:4144
- - C:\Windows\SysWOW64\sc.exe
    sc delete 360rp
    3⤵
    - Launches sc.exe
    PID:3128
- - C:\Windows\SysWOW64\sc.exe
    "C:\Windows\System32\sc.exe" stop PolicyAgent
    3⤵
    - Launches sc.exe
    PID:4652
- C:\Windows\SysWOW64\xhwtqgaa.exe
  C:\Windows\system32\xhwtqgaa.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  PID:1584

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\EC35.tmp

Filesize
4.3MB

MD5
6c7cdd25c2cb0073306eb22aebfc663f

SHA1
a1eba8ab49272b9852fe6a543677e8af36271248

SHA256
58280e3572333f97a7cf9f33e8d31dc26a98b6535965ebd0bde82249fc9bf705

SHA512
17344e07b9e9b2cd6ae4237d7f310732462f9cbb8656883607d7a1a4090e869265f92a6da1718dee50b1375b91583de60c6bd9e7e8db6b6e45e33f4b894365d6

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

Filesize
75KB

MD5
880f130092d44064030eda33bf693a1b

SHA1
f5a1db60845502afb099721236d4f34f323472d8

SHA256
9f088fef88a8b49d5f8d264b05c9440536fbcfdbd0f9cdaf29137f226bb2e9c6

SHA512
d35d510d2e99602e23a0f6e7246dfd578a3b01773499fd8c4386c1d23e7d7fbf0fb4e2494d67ba5ef31950c90227b06b953d09e3ad5f5c9f50ce6042f24b2c74

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

Filesize
75KB

MD5
880f130092d44064030eda33bf693a1b

SHA1
f5a1db60845502afb099721236d4f34f323472d8

SHA256
9f088fef88a8b49d5f8d264b05c9440536fbcfdbd0f9cdaf29137f226bb2e9c6

SHA512
d35d510d2e99602e23a0f6e7246dfd578a3b01773499fd8c4386c1d23e7d7fbf0fb4e2494d67ba5ef31950c90227b06b953d09e3ad5f5c9f50ce6042f24b2c74

Download Submit
C:\Windows\SysWOW64\xhwtqgaa.exe

Filesize
15KB

MD5
ecaa6afefb9034c3184397845755c620

SHA1
8e9e502ad06ac13f25f0370fecb591bcdb88dd5d

SHA256
12908176561536320ce309870bc15206dbadd84c602164e6b76bb75f4748f1c3

SHA512
0d16413c2db64678453f0b83ce7e8ada58f4b629575afc19c820b8e237fbe2b35abea852c3f56b1158f30fa718b92c12b9078f9e43abba3bb673b8b013a117ed

Download Submit
C:\Windows\SysWOW64\xhwtqgaa.exe

Filesize
15KB

MD5
ecaa6afefb9034c3184397845755c620

SHA1
8e9e502ad06ac13f25f0370fecb591bcdb88dd5d

SHA256
12908176561536320ce309870bc15206dbadd84c602164e6b76bb75f4748f1c3

SHA512
0d16413c2db64678453f0b83ce7e8ada58f4b629575afc19c820b8e237fbe2b35abea852c3f56b1158f30fa718b92c12b9078f9e43abba3bb673b8b013a117ed

Download Submit