f7a599275da6ea9db8910048af1c0df00bd79f878747247ae0586d77dd5b8530

General

Target
jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe
Size 27KB
Sample260919-nj5pfaef96
SHA256 f7a599275da6ea9db8910048af1c0df00bd79f878747247ae0586d77dd5b8530
MD5 8fd83de98c65ef4109fa1056f8fb00f6
SHA1 61e877ec6ed43dc9bc71561e3a8acd823b025b6b
SHA512 df40a1103cfc549091252cdcc1ae9855c400376c8dfa581a173fdeda77b2baf86f414698427fa37ac14be919fa08dfd033f2d6748881c7aa4af01924576068dc
SSDEEP 768:SG+WBZTOe/jjIEiFlMGL6IB2wxdfaYhx+EF5sqo/C:SG+sZcnlMfzA5xt7h
TLSH
T11DC2CFB42CE986EDC6DDF0335A0C7600CE3A109197DAB0EE0748F15524BB9001B7FD9A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	taskmrg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\Systask = "{3E65CE89-392C-44BF-A8AB-58DDFA180F95}"	taskmrg.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe

Executes dropped EXE 1 IoCs

pid	Process
4460	taskmrg.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\W:	taskmrg.exe
File opened (read-only)	\??\U:	jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\taskmrg.exe	jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe
File created	C:\Windows\taskmrg.exe	taskmrg.exe
File created	C:\Windows\autodll.dll	taskmrg.exe
File opened for modification	C:\Windows\autodll.dll	jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4540	4460	WerFault.exe	89
4972	4092	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 2 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__8fd83de98c65ef4109fa1056f8fb00f6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskmrg.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3E65CE89-392C-44BF-A8AB-58DDFA180F95}\InProcServer32	taskmrg.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	taskmrg.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	taskmrg.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3E65CE89-392C-44BF-A8AB-58DDFA180F95}	taskmrg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3E65CE89-392C-44BF-A8AB-58DDFA180F95}\InProcServer32\ = "autodll.dll"	taskmrg.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 4460	4092	jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe	89

C:\Users\Admin\AppData\Local\Temp\jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118__8fd83de98c65ef4109fa1056f8fb00f6.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Enumerates connected drives
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Windows\taskmrg.exe
  C:\Windows\taskmrg.exe
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Executes dropped EXE
  - Enumerates connected drives
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:4460
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4460 -s 712
    3⤵
    - Program crash
    PID:4540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4092 -s 616
  2⤵
  - Program crash
  PID:4972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4460 -ip 4460
1⤵
PID:3924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4092 -ip 4092
1⤵
PID:1348

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

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

autodll.dll

Path C:\Windows\autodll.dll
Size 3KB
SHA256 c1000ee449aaec9e4818a3685d2f461f65d09186c7be78268e5c61711edf13d4
MD5 4661302a7dfc52801be27dacf7eecb3b
SHA1 4e14a19c9ddb04297566886d67fe587b29ba57ba
SHA512 18aa92b469bc876eb5b29ba2b66185a67a9fc440e401ae2925f74a4cbf844c76abbe7f98296bef0ecc8e2fa255f7c130b23484e41cee23bb7ae135cdde0603c4
TLSH
T1AB518437A79A08F3E80C073010CB552A79F3906003D642080FCA4329BD362686FB6F82
MD5 SHA1 SHA512 TLSH

Submit Download

taskmrg.exe

Path C:\Windows\taskmrg.exe
Size 27KB
SHA256 f7a599275da6ea9db8910048af1c0df00bd79f878747247ae0586d77dd5b8530
MD5 8fd83de98c65ef4109fa1056f8fb00f6
SHA1 61e877ec6ed43dc9bc71561e3a8acd823b025b6b
SHA512 df40a1103cfc549091252cdcc1ae9855c400376c8dfa581a173fdeda77b2baf86f414698427fa37ac14be919fa08dfd033f2d6748881c7aa4af01924576068dc
SSDEEP 768:SG+WBZTOe/jjIEiFlMGL6IB2wxdfaYhx+EF5sqo/C:SG+sZcnlMfzA5xt7h
TLSH
T11DC2CFB42CE986EDC6DDF0335A0C7600CE3A109197DAB0EE0748F15524BB9001B7FD9A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4092-0-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/4092-7-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/4460-6-0x0000000000400000-0x0000000000438000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads