c98c7bdc88503df4eb5ef21506fc42d028f949807b959b3ff67f21964a2c0b85

General

Target
shellbag anylizer.exe
Size 303KB
Sample240808-npy4vashnp
SHA256 c98c7bdc88503df4eb5ef21506fc42d028f949807b959b3ff67f21964a2c0b85
MD5 88e30898471b07ab0ac563e4bdf99764
SHA1 8b07516da87dc75c9860954af5f6a3a0e7e95ac3
SHA512 b06fe916f11b09b5f98469282e99f783d380481a1bb0230be32d7853675b90f3b9110c8688532d168a80a53d4d380c4c711677b05578a10476d238db812ce591
SSDEEP 1536:T2JYEMehJ9E1QomvlGTqGXfFHfrXEvIzVAXuiRp6EE8bMlnEfwGzod8MddBK1Ohc:avhJ9E1l0cjbpxiBYe1oUJ2hsOFlD
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

evasion persistence

Malware Config

Signatures

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
1484	attrib.exe
2208	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2720	$77update.exe

Loads dropped DLL 1 IoCs

pid	Process
2780	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\update\\$77update.exe\""	shellbag anylizer.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 12 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com
6	4.tcp.eu.ngrok.io
52	4.tcp.eu.ngrok.io
155	6.tcp.eu.ngrok.io
48	4.tcp.eu.ngrok.io
94	6.tcp.eu.ngrok.io
98	pastebin.com
99	pastebin.com
100	6.tcp.eu.ngrok.io
111	6.tcp.eu.ngrok.io
191	6.tcp.eu.ngrok.io

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2556	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
760	shellbag anylizer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	shellbag anylizer.exe
Token: SeDebugPrivilege	2720	$77update.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 1484	760	shellbag anylizer.exe	29
PID 760 wrote to memory of 1484	760	shellbag anylizer.exe	29
PID 760 wrote to memory of 1484	760	shellbag anylizer.exe	29
PID 760 wrote to memory of 2208	760	shellbag anylizer.exe	31
PID 760 wrote to memory of 2208	760	shellbag anylizer.exe	31
PID 760 wrote to memory of 2208	760	shellbag anylizer.exe	31
PID 760 wrote to memory of 2780	760	shellbag anylizer.exe	33
PID 760 wrote to memory of 2780	760	shellbag anylizer.exe	33
PID 760 wrote to memory of 2780	760	shellbag anylizer.exe	33
PID 2780 wrote to memory of 2556	2780	cmd.exe	35
PID 2780 wrote to memory of 2556	2780	cmd.exe	35
PID 2780 wrote to memory of 2556	2780	cmd.exe	35
PID 2780 wrote to memory of 2720	2780	cmd.exe	36
PID 2780 wrote to memory of 2720	2780	cmd.exe	36
PID 2780 wrote to memory of 2720	2780	cmd.exe	36
PID 2720 wrote to memory of 2536	2720	$77update.exe	37
PID 2720 wrote to memory of 2536	2720	$77update.exe	37
PID 2720 wrote to memory of 2536	2720	$77update.exe	37
PID 2720 wrote to memory of 2580	2720	$77update.exe	39
PID 2720 wrote to memory of 2580	2720	$77update.exe	39
PID 2720 wrote to memory of 2580	2720	$77update.exe	39
PID 2720 wrote to memory of 2700	2720	$77update.exe	41
PID 2720 wrote to memory of 2700	2720	$77update.exe	41
PID 2720 wrote to memory of 2700	2720	$77update.exe	41

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

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2208	attrib.exe
1484	attrib.exe

C:\Users\Admin\AppData\Local\Temp\shellbag anylizer.exe
"C:\Users\Admin\AppData\Local\Temp\shellbag anylizer.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:760
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\update"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1484
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\update\$77update.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2208
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp6EE9.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2556
- - C:\Users\Admin\update\$77update.exe
    "C:\Users\Admin\update\$77update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77update.exe
      4⤵
      PID:2536
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77update.exe" /TR "C:\Users\Admin\update\$77update.exe \"\$77update.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2580
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77update.exe
      4⤵
      PID:2700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

Cab396A.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab396A.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

tmp6EE9.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6EE9.tmp.bat
Size 144B
SHA256 35cba7a0b5ec53ea071b4c93eb0f726f9a073775c0c38f07e18af2f7b613966b
MD5 25fc4f1c62fa5af70f3e664f81a51256
SHA1 d878f8d9b2715cd5551da9aff4331d6c17637446
SHA512 012066be796e9fb1097c3a6754f6f9acf1d22fe6c1edc1a327bec6bfb5e571a2272094a39875863528df10371e3535a59efe7662d933ad878aa077522445b39a
MD5 SHA1 SHA512

Submit Download

$77update.exe

Path C:\Users\Admin\update\$77update.exe
Size 303KB
SHA256 c98c7bdc88503df4eb5ef21506fc42d028f949807b959b3ff67f21964a2c0b85
MD5 88e30898471b07ab0ac563e4bdf99764
SHA1 8b07516da87dc75c9860954af5f6a3a0e7e95ac3
SHA512 b06fe916f11b09b5f98469282e99f783d380481a1bb0230be32d7853675b90f3b9110c8688532d168a80a53d4d380c4c711677b05578a10476d238db812ce591
SSDEEP 1536:T2JYEMehJ9E1QomvlGTqGXfFHfrXEvIzVAXuiRp6EE8bMlnEfwGzod8MddBK1Ohc:avhJ9E1l0cjbpxiBYe1oUJ2hsOFlD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/760-0-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

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memory/760-1-0x000000013FF60000-0x000000013FFB0000-memory.dmp

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memory/760-2-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

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memory/760-12-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

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memory/2720-15-0x000000013F7B0000-0x000000013F800000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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