95cf98546d731293e3f39333b4323e625307e9d134c88800fad236112d42e005

General

Target
jaffacakes118_Trojan-Dropper.Win32.Agent.bjtwge.exe
Size 1.2MB
Sample261006-stps7acy6m
SHA256 95cf98546d731293e3f39333b4323e625307e9d134c88800fad236112d42e005
MD5 9acd98fb1436713a405a7572c44d0502
SHA1 c897b061a37cea5a7021b8496025a87e32933bc1
SHA512 2e97a251bc04e769215e18b93e77c9cc2a84f57dc7b0feebf98d8dcd4daad2c62aa163bddf86ca5dd656dcf23180ed92f8b6815faf0c4ce8879a55c12a9a5633
SSDEEP 24576:U4TmJD+STPziPkIOlqBrd9ush/s4ME3tCfjjfqliDu:7TMKTP9OIxd9Phk/KtoPSl4u
TLSH
T1DF452354BBCB50F7E1E3047215A6227FDA3AE2049706ADCBA70C5DC79B426D1C5382EE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4484	gupd.exe
3176	gupd.exe

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
3000	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	gupd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	gupd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	gupd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	gupd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	gupd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gupd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_Trojan-Dropper.Win32.Agent.bjtwge.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1856	schtasks.exe
1708	schtasks.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4028 wrote to memory of 3000	4028	jaffacakes118_Trojan-Dropper.Win32.Agent.bjtwge.exe	88
PID 3000 wrote to memory of 4484	3000	cmd.exe	90
PID 4484 wrote to memory of 4240	4484	gupd.exe	91
PID 4484 wrote to memory of 1856	4484	gupd.exe	93
PID 3176 wrote to memory of 2248	3176	gupd.exe	98
PID 3176 wrote to memory of 1708	3176	gupd.exe	100

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bjtwge.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bjtwge.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\D72C.tmp\D72D.tmp\D72E.bat C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bjtwge.exe"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3000
- - C:\Users\Admin\AppData\Roaming\gupd.exe
    C:\Users\Admin\AppData\Roaming\gupd.exe
    3⤵
    - Executes dropped EXE
    - Reads the TCP/IP host and domain name from the registry
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4484
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /delete /f /tn "System gdate"
      4⤵
      System Location Discovery: System Language Discovery
      PID:4240
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 10 /tn "System gdate" /tr C:\Users\Admin\AppData\Roaming\gupd.exe
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1856

C:\Users\Admin\AppData\Roaming\gupd.exe
C:\Users\Admin\AppData\Roaming\gupd.exe
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3176
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "System gdate"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2248
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 10 /tn "System gdate" /tr C:\Users\Admin\AppData\Roaming\gupd.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1708

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

D72E.bat

Path C:\Users\Admin\AppData\Local\Temp\D72C.tmp\D72D.tmp\D72E.bat
Size 47B
SHA256 8b93cde6ceb6eda874076166a7d962e57c534a916736a0eb4acd43dacb8fec08
MD5 47e9cc3a178304128a81ce32d4b098cc
SHA1 e8e6bbe5f6a8135bc3491d4767ccd2812256411e
SHA512 cccb81b711733f98975e09899a34857cca66989ff2ac0d29458f0be31b3ef1410c3847908d0d2f58eab9015dd514ff49a0eaf308a27ae946e70eee98c88b6249
MD5 SHA1 SHA512

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gupd.exe

Path C:\Users\Admin\AppData\Roaming\gupd.exe
Size 2.8MB
SHA256 000d6eb179230f4b591f7f2e46ab7ee78b42229abe725547274ecb910b4fa45e
MD5 2c4501e114184d77b01edd1ce282b3de
SHA1 9a7a51ba38aacf0066322e870e1eeb619e86a844
SHA512 1b0b6a2130ae0205e3fc1199a68356103157a702d5d879eccf54a661bb1bfd6035831df114f9e5452b9f5b072f0269fb5740e553ccf39b8ea71169555182e936
SSDEEP 49152:OyC80bgmQFx+4lf8roSVMYC8qnrJ46W1LHEggLD:OyC8g4K/qnrJ4TONL
TLSH
T156D55C12B288943BD07B0A3A4877A65C5A3F77712A16DC0F67F4099C8F369416E3E64F
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3176-11-0x0000000000400000-0x00000000006E3000-memory.dmp

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memory/4028-0-0x0000000000416000-0x0000000000417000-memory.dmp

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memory/4484-7-0x0000000000400000-0x00000000006E3000-memory.dmp

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memory/4484-10-0x0000000000400000-0x00000000006E3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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