strrat | ad2be93a1f1aad3389640d2eb5a32137711cd9fb5b9fbc59b804e19231d46d61

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2023, 08:41

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General

Target
050031.jar
Size 70KB
Sample230531-klez1sec4x
SHA256 ad2be93a1f1aad3389640d2eb5a32137711cd9fb5b9fbc59b804e19231d46d61
MD5 4481fc350f86230dff7064a3d0ffc1bb
SHA1 140fb15288336bcbe64cc430f218f050763ae49d
SHA512 6401026ef792b41eebcf0d233874a0314784f257295ed172e638e99518549db29386d6c5fc318ed027b8fba1ed4002f604d3d84a355babaf68443b2d33f45a6c
SSDEEP 1536:fZVlyAv/DUBTdJq67LBwkVUsrhUXUcE9JDc0OMSoMBCuVGMrpBBr:R/lX45dcfkCeHcE9xZOMcBHrprr
MD5 SHA1 SHA512 SSDEEP

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\050031.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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\050031 = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\050031.jar\""	java.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\050031 = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\050031.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
21	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
2632	schtasks.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3792	WMIC.exe
Token: SeSecurityPrivilege	3792	WMIC.exe
Token: SeTakeOwnershipPrivilege	3792	WMIC.exe
Token: SeLoadDriverPrivilege	3792	WMIC.exe
Token: SeSystemProfilePrivilege	3792	WMIC.exe
Token: SeSystemtimePrivilege	3792	WMIC.exe
Token: SeProfSingleProcessPrivilege	3792	WMIC.exe
Token: SeIncBasePriorityPrivilege	3792	WMIC.exe
Token: SeCreatePagefilePrivilege	3792	WMIC.exe
Token: SeBackupPrivilege	3792	WMIC.exe
Token: SeRestorePrivilege	3792	WMIC.exe
Token: SeShutdownPrivilege	3792	WMIC.exe
Token: SeDebugPrivilege	3792	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3792	WMIC.exe
Token: SeRemoteShutdownPrivilege	3792	WMIC.exe
Token: SeUndockPrivilege	3792	WMIC.exe
Token: SeManageVolumePrivilege	3792	WMIC.exe
Token: 33	3792	WMIC.exe
Token: 34	3792	WMIC.exe
Token: 35	3792	WMIC.exe
Token: 36	3792	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3792	WMIC.exe
Token: SeSecurityPrivilege	3792	WMIC.exe
Token: SeTakeOwnershipPrivilege	3792	WMIC.exe
Token: SeLoadDriverPrivilege	3792	WMIC.exe
Token: SeSystemProfilePrivilege	3792	WMIC.exe
Token: SeSystemtimePrivilege	3792	WMIC.exe
Token: SeProfSingleProcessPrivilege	3792	WMIC.exe
Token: SeIncBasePriorityPrivilege	3792	WMIC.exe
Token: SeCreatePagefilePrivilege	3792	WMIC.exe
Token: SeBackupPrivilege	3792	WMIC.exe
Token: SeRestorePrivilege	3792	WMIC.exe
Token: SeShutdownPrivilege	3792	WMIC.exe
Token: SeDebugPrivilege	3792	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3792	WMIC.exe
Token: SeRemoteShutdownPrivilege	3792	WMIC.exe
Token: SeUndockPrivilege	3792	WMIC.exe
Token: SeManageVolumePrivilege	3792	WMIC.exe
Token: 33	3792	WMIC.exe
Token: 34	3792	WMIC.exe
Token: 35	3792	WMIC.exe
Token: 36	3792	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3984	WMIC.exe
Token: SeSecurityPrivilege	3984	WMIC.exe
Token: SeTakeOwnershipPrivilege	3984	WMIC.exe
Token: SeLoadDriverPrivilege	3984	WMIC.exe
Token: SeSystemProfilePrivilege	3984	WMIC.exe
Token: SeSystemtimePrivilege	3984	WMIC.exe
Token: SeProfSingleProcessPrivilege	3984	WMIC.exe
Token: SeIncBasePriorityPrivilege	3984	WMIC.exe
Token: SeCreatePagefilePrivilege	3984	WMIC.exe
Token: SeBackupPrivilege	3984	WMIC.exe
Token: SeRestorePrivilege	3984	WMIC.exe
Token: SeShutdownPrivilege	3984	WMIC.exe
Token: SeDebugPrivilege	3984	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3984	WMIC.exe
Token: SeRemoteShutdownPrivilege	3984	WMIC.exe
Token: SeUndockPrivilege	3984	WMIC.exe
Token: SeManageVolumePrivilege	3984	WMIC.exe
Token: 33	3984	WMIC.exe
Token: 34	3984	WMIC.exe
Token: 35	3984	WMIC.exe
Token: 36	3984	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3984	WMIC.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 3448	1340	java.exe	83
PID 1340 wrote to memory of 3448	1340	java.exe	83
PID 1340 wrote to memory of 3572	1340	java.exe	85
PID 1340 wrote to memory of 3572	1340	java.exe	85
PID 3448 wrote to memory of 2632	3448	cmd.exe	87
PID 3448 wrote to memory of 2632	3448	cmd.exe	87
PID 3572 wrote to memory of 3280	3572	java.exe	89
PID 3572 wrote to memory of 3280	3572	java.exe	89
PID 3280 wrote to memory of 3792	3280	cmd.exe	91
PID 3280 wrote to memory of 3792	3280	cmd.exe	91
PID 3572 wrote to memory of 224	3572	java.exe	93
PID 3572 wrote to memory of 224	3572	java.exe	93
PID 224 wrote to memory of 3984	224	cmd.exe	95
PID 224 wrote to memory of 3984	224	cmd.exe	95
PID 3572 wrote to memory of 3212	3572	java.exe	96
PID 3572 wrote to memory of 3212	3572	java.exe	96
PID 3212 wrote to memory of 760	3212	cmd.exe	98
PID 3212 wrote to memory of 760	3212	cmd.exe	98
PID 3572 wrote to memory of 4932	3572	java.exe	99
PID 3572 wrote to memory of 4932	3572	java.exe	99
PID 4932 wrote to memory of 928	4932	cmd.exe	101
PID 4932 wrote to memory of 928	4932	cmd.exe	101

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\050031.jar
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\050031.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3448
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\050031.jar"
    3⤵
    - Creates scheduled task(s)
    PID:2632
- 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\050031.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3572
- - 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:3280
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3792
- - 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:224
  - - 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:3984
- - 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:3212
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
      4⤵
      PID:760
- - 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:4932
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list
      4⤵
      PID:928

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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050031.jar

Path C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\050031.jar
Size 70KB
SHA256 ad2be93a1f1aad3389640d2eb5a32137711cd9fb5b9fbc59b804e19231d46d61
MD5 4481fc350f86230dff7064a3d0ffc1bb
SHA1 140fb15288336bcbe64cc430f218f050763ae49d
SHA512 6401026ef792b41eebcf0d233874a0314784f257295ed172e638e99518549db29386d6c5fc318ed027b8fba1ed4002f604d3d84a355babaf68443b2d33f45a6c
SSDEEP 1536:fZVlyAv/DUBTdJq67LBwkVUsrhUXUcE9JDc0OMSoMBCuVGMrpBBr:R/lX45dcfkCeHcE9xZOMcBHrprr
MD5 SHA1 SHA512 SSDEEP

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90737d32e3aba4b.timestamp

Path C:\Users\Admin\.oracle_jre_usage\90737d32e3aba4b.timestamp
Size 50B
SHA256 c06821ac776ad1ad04be3ad4b474d294bf1f98fc910b0ceafc888058175acfb1
MD5 a305420694f98b537d311716d47381a3
SHA1 40db8ae923ad736367998b8b377ad5b6baf45841
SHA512 acbe2abb46da788f57c7629bb6ba4aa5415caf83ced9c00a957f2b6266fc1d0600ffbd6178f381b96a9c2c50d167f916c7197a43a4ba2db74c65406ddaabf907
MD5 SHA1 SHA512

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050031.jar

Path C:\Users\Admin\AppData\Roaming\050031.jar
Size 70KB
SHA256 ad2be93a1f1aad3389640d2eb5a32137711cd9fb5b9fbc59b804e19231d46d61
MD5 4481fc350f86230dff7064a3d0ffc1bb
SHA1 140fb15288336bcbe64cc430f218f050763ae49d
SHA512 6401026ef792b41eebcf0d233874a0314784f257295ed172e638e99518549db29386d6c5fc318ed027b8fba1ed4002f604d3d84a355babaf68443b2d33f45a6c
SSDEEP 1536:fZVlyAv/DUBTdJq67LBwkVUsrhUXUcE9JDc0OMSoMBCuVGMrpBBr:R/lX45dcfkCeHcE9xZOMcBHrprr
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1340-143-0x0000000002870000-0x0000000002871000-memory.dmp

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memory/3572-168-0x00000000022B0000-0x00000000022B1000-memory.dmp

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memory/3572-170-0x00000000022B0000-0x00000000022B1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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