wshrat | 57c2349f1ebc638572ed4c2566fbae3293e1b933561d9f7dd47aac8826442eed

Analysis

max time kernel
144s
max time network
162s
platform
windows10_x64
resource
win10v20210410
submitted
17/06/2021, 02:42

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
NewPurchaseOrderForJune.exe
Size 756KB
Sample210617-pb6gbnfc5a
SHA256 57c2349f1ebc638572ed4c2566fbae3293e1b933561d9f7dd47aac8826442eed
MD5 1bfd1b738f6291505115453205aade5e
SHA1 094cee40bb4b0b9cd8e9f4614c298988f4221c09
SHA512 7f291f9055bd482ad01b81f9e96c560f20c9d8412cfe5a4fcaa0af2f3617847484c3a644291c8601bed3aa38b56c6815bf90f38afb229bdffd581c626b9b0e99
MD5 SHA1 SHA512

Score

10^/10

wshrat persistence trojan

Malware Config

Signatures

WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

WSHRAT Payload 1 IoCs

resource	yara_rule
behavioral2/files/0x000100000001ab75-166.dat	family_wshrat

Blocklisted process makes network request 10 IoCs

flow	pid	Process
16	2268	wscript.exe
17	2268	wscript.exe
18	2268	wscript.exe
19	2268	wscript.exe
20	2268	wscript.exe
22	2268	wscript.exe
23	2268	wscript.exe
24	2268	wscript.exe
25	2268	wscript.exe
26	2268	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WPXhb.vbs	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WPXhb.vbs	wscript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WPXhb = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\WPXhb.vbs\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\WPXhb = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\WPXhb.vbs\""	wscript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3876 set thread context of 2436	3876	NewPurchaseOrderForJune.exe	89

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4056	schtasks.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
3876	NewPurchaseOrderForJune.exe
3876	NewPurchaseOrderForJune.exe
1512	powershell.exe
3876	NewPurchaseOrderForJune.exe
3876	NewPurchaseOrderForJune.exe
3156	powershell.exe
2368	powershell.exe
3156	powershell.exe
1512	powershell.exe
2368	powershell.exe
1512	powershell.exe
3156	powershell.exe
2368	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3876	NewPurchaseOrderForJune.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeDebugPrivilege	3156	powershell.exe
Token: SeDebugPrivilege	2368	powershell.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3876 wrote to memory of 1512	3876	NewPurchaseOrderForJune.exe	79
PID 3876 wrote to memory of 1512	3876	NewPurchaseOrderForJune.exe	79
PID 3876 wrote to memory of 1512	3876	NewPurchaseOrderForJune.exe	79
PID 3876 wrote to memory of 3156	3876	NewPurchaseOrderForJune.exe	81
PID 3876 wrote to memory of 3156	3876	NewPurchaseOrderForJune.exe	81
PID 3876 wrote to memory of 3156	3876	NewPurchaseOrderForJune.exe	81
PID 3876 wrote to memory of 4056	3876	NewPurchaseOrderForJune.exe	83
PID 3876 wrote to memory of 4056	3876	NewPurchaseOrderForJune.exe	83
PID 3876 wrote to memory of 4056	3876	NewPurchaseOrderForJune.exe	83
PID 3876 wrote to memory of 2368	3876	NewPurchaseOrderForJune.exe	85
PID 3876 wrote to memory of 2368	3876	NewPurchaseOrderForJune.exe	85
PID 3876 wrote to memory of 2368	3876	NewPurchaseOrderForJune.exe	85
PID 3876 wrote to memory of 3968	3876	NewPurchaseOrderForJune.exe	86
PID 3876 wrote to memory of 3968	3876	NewPurchaseOrderForJune.exe	86
PID 3876 wrote to memory of 3968	3876	NewPurchaseOrderForJune.exe	86
PID 3876 wrote to memory of 2700	3876	NewPurchaseOrderForJune.exe	88
PID 3876 wrote to memory of 2700	3876	NewPurchaseOrderForJune.exe	88
PID 3876 wrote to memory of 2700	3876	NewPurchaseOrderForJune.exe	88
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 3876 wrote to memory of 2436	3876	NewPurchaseOrderForJune.exe	89
PID 2436 wrote to memory of 2268	2436	NewPurchaseOrderForJune.exe	90
PID 2436 wrote to memory of 2268	2436	NewPurchaseOrderForJune.exe	90
PID 2436 wrote to memory of 2268	2436	NewPurchaseOrderForJune.exe	90

C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe
"C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3876
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1512
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\IWBdllKaYAy.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3156
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IWBdllKaYAy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE2FE.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4056
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\IWBdllKaYAy.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2368
- C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe
  "C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe"
  2⤵
  PID:3968
- C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe
  "C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe"
  2⤵
  PID:2700
- C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe
  "C:\Users\Admin\AppData\Local\Temp\NewPurchaseOrderForJune.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2436
- - C:\Windows\SysWOW64\wscript.exe
    "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Roaming\WPXhb.vbs
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    - Adds Run key to start application
    PID:2268

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1512-198-0x00000000073C3000-0x00000000073C4000-memory.dmp

Download

memory/1512-132-0x0000000007260000-0x0000000007261000-memory.dmp

Download

memory/1512-171-0x0000000008AC0000-0x0000000008AC1000-memory.dmp

Download

memory/1512-147-0x00000000073C0000-0x00000000073C1000-memory.dmp

Download

memory/1512-158-0x00000000073C2000-0x00000000073C3000-memory.dmp

Download

memory/1512-138-0x0000000007960000-0x0000000007961000-memory.dmp

Download

memory/1512-195-0x000000007EB80000-0x000000007EB81000-memory.dmp

Download

memory/2368-159-0x0000000006D10000-0x0000000006D11000-memory.dmp

Download

memory/2368-197-0x0000000006D13000-0x0000000006D14000-memory.dmp

Download

memory/2368-151-0x0000000006D12000-0x0000000006D13000-memory.dmp

Download

memory/2368-196-0x000000007E9C0000-0x000000007E9C1000-memory.dmp

Download

memory/2436-139-0x0000000000400000-0x0000000000488000-memory.dmp

Download

memory/3156-169-0x0000000008580000-0x0000000008581000-memory.dmp

Download

memory/3156-153-0x0000000006CF0000-0x0000000006CF1000-memory.dmp

Download

memory/3156-156-0x0000000006CF2000-0x0000000006CF3000-memory.dmp

Download

memory/3156-150-0x0000000007B40000-0x0000000007B41000-memory.dmp

Download

memory/3156-146-0x0000000007AD0000-0x0000000007AD1000-memory.dmp

Download

memory/3156-134-0x0000000007330000-0x0000000007331000-memory.dmp

Download

memory/3156-199-0x0000000006CF3000-0x0000000006CF4000-memory.dmp

Download

memory/3156-194-0x000000007ED60000-0x000000007ED61000-memory.dmp

Download

memory/3156-154-0x0000000007C70000-0x0000000007C71000-memory.dmp

Download

memory/3156-167-0x0000000007BD0000-0x0000000007BD1000-memory.dmp

Download

memory/3876-124-0x0000000008570000-0x0000000008606000-memory.dmp

Download

memory/3876-123-0x0000000006030000-0x00000000060B8000-memory.dmp

Download

memory/3876-114-0x0000000000990000-0x0000000000991000-memory.dmp

Download

memory/3876-122-0x0000000005320000-0x000000000581E000-memory.dmp

Download

memory/3876-121-0x0000000005320000-0x0000000005336000-memory.dmp

Download

memory/3876-120-0x0000000005530000-0x0000000005531000-memory.dmp

Download

memory/3876-119-0x0000000005270000-0x0000000005271000-memory.dmp

Download

memory/3876-118-0x00000000053C0000-0x00000000053C1000-memory.dmp

Download

memory/3876-117-0x0000000005820000-0x0000000005821000-memory.dmp

Download

memory/3876-116-0x0000000005280000-0x0000000005281000-memory.dmp

Download