strrat | 41fc9828d61ebd2a0cb90b8ce07bc0dd5f67b194ff70163525034683e2e58b04

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2023, 06:22

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General

Target

Purchase_Order.jar
Size

70KB
MD5

5e0450e34e3883e5ffbb964509d09b8b
SHA1

4bb703d44836892d2ec8a5bd1a38eb9badd2797e
SHA256

41fc9828d61ebd2a0cb90b8ce07bc0dd5f67b194ff70163525034683e2e58b04
SHA512

794d6d1f5ec154e479262df00df01d9a3f0575dc34cf17fe8070dfdc6fb446014a643f4bc574fa1c2d04e6e86b391879aaf8643f362d3666a073836282496fa1
SSDEEP

1536:EnYncm2ccI5Fmd9tz/kC72EsM0OjzSDPNXOjaVYO/M2bN:MQWM/md9tzdz0OaDPNXXVFUKN

Score

10^/10

strrat persistence stealer trojan

Malware Config

Signatures

STRRAT
STRRAT is a remote access tool than can steal credentials and log keystrokes.
trojan stealer strrat

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Purchase_Order.jar	java.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Purchase_Order = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\Purchase_Order.jar\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Purchase_Order = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\Purchase_Order.jar\""	java.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
24	ip-api.com

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
3168	schtasks.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1044	WMIC.exe
Token: SeSecurityPrivilege	1044	WMIC.exe
Token: SeTakeOwnershipPrivilege	1044	WMIC.exe
Token: SeLoadDriverPrivilege	1044	WMIC.exe
Token: SeSystemProfilePrivilege	1044	WMIC.exe
Token: SeSystemtimePrivilege	1044	WMIC.exe
Token: SeProfSingleProcessPrivilege	1044	WMIC.exe
Token: SeIncBasePriorityPrivilege	1044	WMIC.exe
Token: SeCreatePagefilePrivilege	1044	WMIC.exe
Token: SeBackupPrivilege	1044	WMIC.exe
Token: SeRestorePrivilege	1044	WMIC.exe
Token: SeShutdownPrivilege	1044	WMIC.exe
Token: SeDebugPrivilege	1044	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1044	WMIC.exe
Token: SeRemoteShutdownPrivilege	1044	WMIC.exe
Token: SeUndockPrivilege	1044	WMIC.exe
Token: SeManageVolumePrivilege	1044	WMIC.exe
Token: 33	1044	WMIC.exe
Token: 34	1044	WMIC.exe
Token: 35	1044	WMIC.exe
Token: 36	1044	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1044	WMIC.exe
Token: SeSecurityPrivilege	1044	WMIC.exe
Token: SeTakeOwnershipPrivilege	1044	WMIC.exe
Token: SeLoadDriverPrivilege	1044	WMIC.exe
Token: SeSystemProfilePrivilege	1044	WMIC.exe
Token: SeSystemtimePrivilege	1044	WMIC.exe
Token: SeProfSingleProcessPrivilege	1044	WMIC.exe
Token: SeIncBasePriorityPrivilege	1044	WMIC.exe
Token: SeCreatePagefilePrivilege	1044	WMIC.exe
Token: SeBackupPrivilege	1044	WMIC.exe
Token: SeRestorePrivilege	1044	WMIC.exe
Token: SeShutdownPrivilege	1044	WMIC.exe
Token: SeDebugPrivilege	1044	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1044	WMIC.exe
Token: SeRemoteShutdownPrivilege	1044	WMIC.exe
Token: SeUndockPrivilege	1044	WMIC.exe
Token: SeManageVolumePrivilege	1044	WMIC.exe
Token: 33	1044	WMIC.exe
Token: 34	1044	WMIC.exe
Token: 35	1044	WMIC.exe
Token: 36	1044	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1244	WMIC.exe
Token: SeSecurityPrivilege	1244	WMIC.exe
Token: SeTakeOwnershipPrivilege	1244	WMIC.exe
Token: SeLoadDriverPrivilege	1244	WMIC.exe
Token: SeSystemProfilePrivilege	1244	WMIC.exe
Token: SeSystemtimePrivilege	1244	WMIC.exe
Token: SeProfSingleProcessPrivilege	1244	WMIC.exe
Token: SeIncBasePriorityPrivilege	1244	WMIC.exe
Token: SeCreatePagefilePrivilege	1244	WMIC.exe
Token: SeBackupPrivilege	1244	WMIC.exe
Token: SeRestorePrivilege	1244	WMIC.exe
Token: SeShutdownPrivilege	1244	WMIC.exe
Token: SeDebugPrivilege	1244	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1244	WMIC.exe
Token: SeRemoteShutdownPrivilege	1244	WMIC.exe
Token: SeUndockPrivilege	1244	WMIC.exe
Token: SeManageVolumePrivilege	1244	WMIC.exe
Token: 33	1244	WMIC.exe
Token: 34	1244	WMIC.exe
Token: 35	1244	WMIC.exe
Token: 36	1244	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1244	WMIC.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 692 wrote to memory of 2672	692	java.exe	86
PID 692 wrote to memory of 2672	692	java.exe	86
PID 692 wrote to memory of 4592	692	java.exe	87
PID 692 wrote to memory of 4592	692	java.exe	87
PID 2672 wrote to memory of 3168	2672	cmd.exe	90
PID 2672 wrote to memory of 3168	2672	cmd.exe	90
PID 4592 wrote to memory of 3068	4592	java.exe	91
PID 4592 wrote to memory of 3068	4592	java.exe	91
PID 3068 wrote to memory of 1044	3068	cmd.exe	93
PID 3068 wrote to memory of 1044	3068	cmd.exe	93
PID 4592 wrote to memory of 3796	4592	java.exe	94
PID 4592 wrote to memory of 3796	4592	java.exe	94
PID 3796 wrote to memory of 1244	3796	cmd.exe	96
PID 3796 wrote to memory of 1244	3796	cmd.exe	96
PID 4592 wrote to memory of 5064	4592	java.exe	97
PID 4592 wrote to memory of 5064	4592	java.exe	97
PID 5064 wrote to memory of 4604	5064	cmd.exe	99
PID 5064 wrote to memory of 4604	5064	cmd.exe	99
PID 4592 wrote to memory of 4212	4592	java.exe	100
PID 4592 wrote to memory of 4212	4592	java.exe	100
PID 4212 wrote to memory of 3164	4212	cmd.exe	102
PID 4212 wrote to memory of 3164	4212	cmd.exe	102

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\ProgramData\Oracle\Java\javapath\java.exe
java -jar C:\Users\Admin\AppData\Local\Temp\Purchase_Order.jar
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:692
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Purchase_Order.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2672
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Purchase_Order.jar"
    3⤵
    - Creates scheduled task(s)
    PID:3168
- C:\Program Files\Java\jre1.8.0_66\bin\java.exe
  "C:\Program Files\Java\jre1.8.0_66\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\Purchase_Order.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\SYSTEM32\cmd.exe
    cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3068
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1044
- - C:\Windows\SYSTEM32\cmd.exe
    cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3796
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1244
- - C:\Windows\SYSTEM32\cmd.exe
    cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5064
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
      4⤵
      PID:4604
- - C:\Windows\SYSTEM32\cmd.exe
    cmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4212
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list
      4⤵
      PID:3164

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

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\Purchase_Order.jar

Filesize
70KB

MD5
5e0450e34e3883e5ffbb964509d09b8b

SHA1
4bb703d44836892d2ec8a5bd1a38eb9badd2797e

SHA256
41fc9828d61ebd2a0cb90b8ce07bc0dd5f67b194ff70163525034683e2e58b04

SHA512
794d6d1f5ec154e479262df00df01d9a3f0575dc34cf17fe8070dfdc6fb446014a643f4bc574fa1c2d04e6e86b391879aaf8643f362d3666a073836282496fa1

Download Submit
C:\Users\Admin\.oracle_jre_usage\90737d32e3aba4b.timestamp

Filesize
50B

MD5
61fec4b7979e2f786f4630109d41839e

SHA1
a12833719cdcd273c1086194d3f82b270030a8a1

SHA256
ab4c4ff27eb9b4558c8d3f68a1d1db974506ba41f3e578804f369cde8e4170af

SHA512
f6df45f141eca4298315f6a5ca4d5b130284e35611f836d25be5dde8d19773a2c629f382e3a705484b9bf3ac49760513e1a130d74bf2104680f81bb42cfbba1a

Download Submit
C:\Users\Admin\AppData\Roaming\Purchase_Order.jar

Filesize
70KB

MD5
5e0450e34e3883e5ffbb964509d09b8b

SHA1
4bb703d44836892d2ec8a5bd1a38eb9badd2797e

SHA256
41fc9828d61ebd2a0cb90b8ce07bc0dd5f67b194ff70163525034683e2e58b04

SHA512
794d6d1f5ec154e479262df00df01d9a3f0575dc34cf17fe8070dfdc6fb446014a643f4bc574fa1c2d04e6e86b391879aaf8643f362d3666a073836282496fa1

Download Submit
memory/692-143-0x0000000000610000-0x0000000000611000-memory.dmp

Filesize
4KB

Download
memory/4592-164-0x0000000000DF0000-0x0000000000DF1000-memory.dmp

Filesize
4KB

Download
memory/4592-166-0x0000000000DF0000-0x0000000000DF1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads