nymaim | 6a0077d90d64ead80108d4966c919112c787a5a13036099b36bc82759f7a1133

General

Target

file.exe
Size

229KB
MD5

ee681ff8a455d5e1f057de0f0d887b2f
SHA1

b9baec15bdf4c01ff6b2f8fbc94f9de59d358841
SHA256

6a0077d90d64ead80108d4966c919112c787a5a13036099b36bc82759f7a1133
SHA512

e79a88290009f0de7f1728802b03481865d1b58448a1537cc8bbaf5c4f322439dddbecf04751bd25c31120fe8e246f0b7f5d295fe5b90908c56f673e7e083c7e
SSDEEP

3072:9zR1kwKU1+Vg1s3g7EFC2ChKMiY6MqdRsO1VmkkDBWQZgdPJNL0NkHVUTnfgtEZN:933nVrOnmLW9dxNl1QnfgGZBgI9xcNG

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1120	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1436	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1332	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1732	1120	WerFault.exe	30

Kills process with taskkill 1 IoCs

evasion

pid	Process
1480	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1612	file.exe
1612	file.exe
1612	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1120	Cleaner.exe
Token: SeDebugPrivilege	1480	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 1332	1612	file.exe	28
PID 1612 wrote to memory of 1332	1612	file.exe	28
PID 1612 wrote to memory of 1332	1612	file.exe	28
PID 1612 wrote to memory of 1332	1612	file.exe	28
PID 1332 wrote to memory of 1120	1332	cmd.exe	30
PID 1332 wrote to memory of 1120	1332	cmd.exe	30
PID 1332 wrote to memory of 1120	1332	cmd.exe	30
PID 1332 wrote to memory of 1120	1332	cmd.exe	30
PID 1120 wrote to memory of 1732	1120	Cleaner.exe	32
PID 1120 wrote to memory of 1732	1120	Cleaner.exe	32
PID 1120 wrote to memory of 1732	1120	Cleaner.exe	32
PID 1612 wrote to memory of 1436	1612	file.exe	33
PID 1612 wrote to memory of 1436	1612	file.exe	33
PID 1612 wrote to memory of 1436	1612	file.exe	33
PID 1612 wrote to memory of 1436	1612	file.exe	33
PID 1436 wrote to memory of 1480	1436	cmd.exe	35
PID 1436 wrote to memory of 1480	1436	cmd.exe	35
PID 1436 wrote to memory of 1480	1436	cmd.exe	35
PID 1436 wrote to memory of 1480	1436	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\jDmcYUETe\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1332
- - C:\Users\Admin\AppData\Local\Temp\jDmcYUETe\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\jDmcYUETe\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1120
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1120 -s 1152
      4⤵
      Program crash
      PID:1732
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1436
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1480

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\jDmcYUETe\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\jDmcYUETe\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\jDmcYUETe\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
\Users\Admin\AppData\Local\Temp\jDmcYUETe\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
memory/1120-64-0x0000000001360000-0x00000000014B8000-memory.dmp

Filesize
1.3MB

Download
memory/1120-65-0x000007FEFBD91000-0x000007FEFBD93000-memory.dmp

Filesize
8KB

Download
memory/1120-67-0x00000000012E0000-0x0000000001322000-memory.dmp

Filesize
264KB

Download
memory/1612-56-0x0000000000250000-0x000000000028F000-memory.dmp

Filesize
252KB

Download
memory/1612-55-0x000000000075D000-0x0000000000784000-memory.dmp

Filesize
156KB

Download
memory/1612-54-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/1612-69-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1612-63-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1612-74-0x000000000075D000-0x0000000000784000-memory.dmp

Filesize
156KB

Download
memory/1612-75-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1612-57-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download

Analysis

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