21c7791451c26f5ca9b436e40fa91a93785b10097723b6741d843b2125ff35c1

General

Target
jaffacakes118_Trojan-Dropper.Win32.FrauDrop.aivkv.exe
Size 7.9MB
Sample261009-xdafsastdw
SHA256 21c7791451c26f5ca9b436e40fa91a93785b10097723b6741d843b2125ff35c1
MD5 91162742affef8460e721c08d57c87c0
SHA1 d63a5ee4f94eb0803e0cd481f7f483e9fa4d0e11
SHA512 ec57b78493afce1124c3e31175ca5b267590b4a4d073e4ce45c8681336157a9f7d7c1251075cb1b3eda885b17517dc01c2c2582d4289d5d9333c554b68a3b2a6
SSDEEP 196608:wA3Dl5WAjDfmEkYzCtBv62aSjvsreKDmgCBnPlmqj:wA3D12EkaC1aS7srlDmgCBnPlZj
TLSH
T1A38633A2B7824E75C46D29304C6A8544DE677D7844C4A80A3FB9FA8F0FBD79248B6F50
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
5324	irsetup.exe

Discovers running processes 1 TTPs 1 IoCs

Running process information can be used to identify security tools or plan follow-on actions.

discovery

Process Discovery

T1057

pid	Process
3628	tasklist.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\list.tmp	cmd.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e00000001c490-3.dat	upx
behavioral2/memory/5324-4-0x0000000000400000-0x0000000000527000-memory.dmp	upx
behavioral2/memory/5324-16-0x0000000000400000-0x0000000000527000-memory.dmp	upx
behavioral2/memory/5324-17-0x0000000000400000-0x0000000000527000-memory.dmp	upx

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4244	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_Trojan-Dropper.Win32.FrauDrop.aivkv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	irsetup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}\Instance\	irsetup.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3628	tasklist.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5324	irsetup.exe
5324	irsetup.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4176 wrote to memory of 5324	4176	jaffacakes118_Trojan-Dropper.Win32.FrauDrop.aivkv.exe	89
PID 5324 wrote to memory of 4244	5324	irsetup.exe	90
PID 4244 wrote to memory of 3628	4244	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.FrauDrop.aivkv.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.FrauDrop.aivkv.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4176
- C:\Users\Admin\AppData\Local\Temp\_ir_sf7_temp_0\irsetup.exe
  __IRAOFF:520716 "__IRAFN:C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.FrauDrop.aivkv.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5324
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c tasklist.exe>list.tmp
    3⤵
    - Drops file in System32 directory
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4244
  - - C:\Windows\SysWOW64\tasklist.exe
      tasklist.exe
      4⤵
      Discovers running processes
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:3628

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Process Discovery

1

T1057

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

IRIMG2.JPG

Path C:\Users\Admin\AppData\Local\Temp\_ir_sf7_temp_0\IRIMG2.JPG
Size 59KB
SHA256 312bcd1f10bac3f8a0bd9bed46bb8e8a42ed0224ff0e1be3a5f748401b47cdbc
MD5 0028d88c77614bd1bb9c75c3ec8b23b2
SHA1 ddf237e383d35fd6b0c5edffcef582ec92738b00
SHA512 bbe62015d6fb2846354f4a208300493ad8e3206e3e790c443f2043e26f7b94fe435a825fee157067b0c9f907d2d25b67e1d7a712470397912ca58cccd3971f03
SSDEEP 1536:IEiYHVkbRU0K9Sjley9vwEGCxK48CP52dE74SgBu5jF:1iYHNEvy6t5P52dE7sBgjF
TLSH
T1B753024A4C07A803F13C5ABDA33752B71C37578A318F96C9273E819999987BA315F253
MD5 SHA1 SHA512 SSDEEP TLSH

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irsetup.exe

Path C:\Users\Admin\AppData\Local\Temp\_ir_sf7_temp_0\irsetup.exe
Size 440KB
SHA256 d95b5bf9ca97c1900de5357743282bab655d61d616606485088e1708559b7cf1
MD5 75ca7ff96bf5a316c3af2de6a412bd54
SHA1 0a093950790ff0dddff6f5f29c6b02c10997e0c5
SHA512 b8da86f2f1e908955254e5168d0447f479cec7815a8b081a7b38eb87187cb2eb992109c67e006361b96bc1529ee8abc9dc477d78e9ca565e43f5415b492771d4
SSDEEP 6144:JgHXCFdoW/HotZk9K0C4mXE7EbmSIPzjZivhzO2PJehlNAI04Jl47sHvEh4UjfzS:cyIIIzAClE7uDOch+h2ul/mJo
TLSH
T1E8A4238B77B62D61C0AC4E3124672221FA75ED7DA880472E57D8FC5F1EF4912483FA4A
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5324-4-0x0000000000400000-0x0000000000527000-memory.dmp

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memory/5324-6-0x0000000000526000-0x0000000000527000-memory.dmp

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memory/5324-16-0x0000000000400000-0x0000000000527000-memory.dmp

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memory/5324-17-0x0000000000400000-0x0000000000527000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads