5e38850c7d084959ee0d62fa802a9c3fd567d7c5229beb7dc6a7eb76e33bd34a

General

Target
8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe
Size 115KB
Sample240812-cwjrysvgpc
SHA256 5e38850c7d084959ee0d62fa802a9c3fd567d7c5229beb7dc6a7eb76e33bd34a
MD5 8cf26505203d553b12a389b745cc56b1
SHA1 86d99689b024fa5e00011488730322f8f33fab22
SHA512 48da22bd849cf34e3bb1b048bc7b096a781cb39b5fe0ed8234117f234e06d3d54215e3675591c2278ddf36380e494cffaa68edbf32b5d646241d1b7f82ad9b41
SSDEEP 1536:KUthJ4DCIiGIgT3DPdk9ypoSQnUJsBhNLw82aDBFtVltvHC8Yyx:KUtLFlgfPdk9ypHJqBhN0kDBFtpi8
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

defense_evasion discovery exploit

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
2412	takeown.exe
2252	icacls.exe

Deletes itself 1 IoCs

pid	Process
2536	regsvr32.exe

Loads dropped DLL 1 IoCs

pid	Process
2536	regsvr32.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2412	takeown.exe
2252	icacls.exe

File and Directory Permissions Modification: Windows File and Directory Permissions Modification 1 TTPs
defense_evasion

Windows File and Directory Permissions Modification
T1222.001

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\apa.dll	regsvr32.exe
File created	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe
File opened for modification	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe

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

System Information Discovery
T1082

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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	takeown.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2536	regsvr32.exe
2536	regsvr32.exe
2536	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2536	regsvr32.exe
Token: SeTakeOwnershipPrivilege	2412	takeown.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 3016 wrote to memory of 2536	3016	8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe	30
PID 2536 wrote to memory of 2412	2536	regsvr32.exe	31
PID 2536 wrote to memory of 2412	2536	regsvr32.exe	31
PID 2536 wrote to memory of 2412	2536	regsvr32.exe	31
PID 2536 wrote to memory of 2412	2536	regsvr32.exe	31
PID 2536 wrote to memory of 2252	2536	regsvr32.exe	33
PID 2536 wrote to memory of 2252	2536	regsvr32.exe	33
PID 2536 wrote to memory of 2252	2536	regsvr32.exe	33
PID 2536 wrote to memory of 2252	2536	regsvr32.exe	33
PID 2536 wrote to memory of 600	2536	regsvr32.exe	9

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch
1⤵
PID:600

C:\Users\Admin\AppData\Local\Temp\8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\system32\regsvr32.exe" /s C:\Users\Admin\AppData\Local\Temp\~~f768585.tmp ,C:\Users\Admin\AppData\Local\Temp\8cf26505203d553b12a389b745cc56b1_JaffaCakes118.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2536
- - C:\Windows\SysWOW64\takeown.exe
    takeown /f "C:\Windows\system32\rpcss.dll"
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2412
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Windows\system32\rpcss.dll" /grant administrators:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2252

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

2

T1222

Windows File and Directory Permissions Modification

1

T1222.001

Credential Access

Discovery

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

~~f768585.tmp

Path C:\Users\Admin\AppData\Local\Temp\~~f768585.tmp
Size 1.1MB
SHA256 073a122a22ba82652c700acdf1ef60593e5d69c068ae221b392e060b7f7235be
MD5 3b009b7fe9e96fb76d26425c8f6b8a59
SHA1 dd6e7ea240b7aaee747ed8b48509a64744aea995
SHA512 f4e12d3734d6510029af2322ae5e7ce057dd77d2786052cc7743d7d72d6fbe9095093eb5050e891354c2b9bf7fc2b2e348627257c3ad7d0e9f189dcd762220ab
SSDEEP 3072:5dNtsGPKv1AHllRl0l4jWLda0Zv6BRibf1xPc:fNtXyvCl0MWLda0Zv6Bqf1u
MD5 SHA1 SHA512 SSDEEP

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apa.dll

Path C:\Windows\SysWOW64\apa.dll
Size 225B
SHA256 740ccc3c65beaab40dc4ea85096a42a3afd09d5fb94261d6ca49434e848b3247
MD5 b37a723a56cd2aea6b461c2c1ae482ff
SHA1 51fb42b1da9a0d8a71465ac9f3044ede9ea8c8d6
SHA512 47d713021919d7b8f56954d20e238d81de006a135dc0b8f9c507445dcc791b0b16041436998d46b2abb0d285ccbde69768c14eadb0dfd8621a4011f0e1aa5e53
MD5 SHA1 SHA512

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memory/600-12-0x00000000001E0000-0x00000000001E1000-memory.dmp

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Analysis

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