nymaim | 9f9b9a200438f06bf84313f2b500aa0efeb6aa4ce81c1a8996f72f0204f36ac5

General

Target

file.exe
Size

258KB
MD5

d167c0bc09924231ed0f3bd6b00172d6
SHA1

d186549a74185305356bf24132f44ae80f89e2ee
SHA256

9f9b9a200438f06bf84313f2b500aa0efeb6aa4ce81c1a8996f72f0204f36ac5
SHA512

7af318951fc1fe74107703263d571676b6df4a774247762ea88f562e0a559d8556d45f332dbcf216dc4bd4c259e1d66bc5937c01b48b2588c8b25460237e727c
SSDEEP

3072:Glu0ekm4YkR357xDwmzjSc2jdN/Y7kxXHg81z8S0Ct+PFsf7CAThBG5x:lzOwmf2dV4kxXHgEzD0zsfm

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
1404	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1888	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1704	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
1956	1404	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1516	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1720	file.exe
1720	file.exe
1720	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1404	Cleaner.exe
Token: SeDebugPrivilege	1516	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 1704	1720	file.exe	29
PID 1720 wrote to memory of 1704	1720	file.exe	29
PID 1720 wrote to memory of 1704	1720	file.exe	29
PID 1720 wrote to memory of 1704	1720	file.exe	29
PID 1704 wrote to memory of 1404	1704	cmd.exe	31
PID 1704 wrote to memory of 1404	1704	cmd.exe	31
PID 1704 wrote to memory of 1404	1704	cmd.exe	31
PID 1704 wrote to memory of 1404	1704	cmd.exe	31
PID 1404 wrote to memory of 1956	1404	Cleaner.exe	33
PID 1404 wrote to memory of 1956	1404	Cleaner.exe	33
PID 1404 wrote to memory of 1956	1404	Cleaner.exe	33
PID 1720 wrote to memory of 1888	1720	file.exe	34
PID 1720 wrote to memory of 1888	1720	file.exe	34
PID 1720 wrote to memory of 1888	1720	file.exe	34
PID 1720 wrote to memory of 1888	1720	file.exe	34
PID 1888 wrote to memory of 1516	1888	cmd.exe	36
PID 1888 wrote to memory of 1516	1888	cmd.exe	36
PID 1888 wrote to memory of 1516	1888	cmd.exe	36
PID 1888 wrote to memory of 1516	1888	cmd.exe	36

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:1720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\jnxQ1E0L2ngUqa3jmlA8\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Users\Admin\AppData\Local\Temp\jnxQ1E0L2ngUqa3jmlA8\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\jnxQ1E0L2ngUqa3jmlA8\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1404
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1404 -s 1156
      4⤵
      Program crash
      PID:1956
- 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:1888
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1516

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\jnxQ1E0L2ngUqa3jmlA8\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\jnxQ1E0L2ngUqa3jmlA8\Cleaner.exe

Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\jnxQ1E0L2ngUqa3jmlA8\Cleaner.exe

Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
\Users\Admin\AppData\Local\Temp\jnxQ1E0L2ngUqa3jmlA8\Cleaner.exe

Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
memory/1404-64-0x000007FEFC011000-0x000007FEFC013000-memory.dmp

Filesize
8KB

Download
memory/1404-66-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1404-63-0x0000000000F30000-0x00000000010B0000-memory.dmp

Filesize
1.5MB

Download
memory/1720-67-0x000000000026B000-0x0000000000292000-memory.dmp

Filesize
156KB

Download
memory/1720-55-0x000000000026B000-0x0000000000292000-memory.dmp

Filesize
156KB

Download
memory/1720-54-0x00000000757A1000-0x00000000757A3000-memory.dmp

Filesize
8KB

Download
memory/1720-56-0x00000000003C0000-0x00000000003FF000-memory.dmp

Filesize
252KB

Download
memory/1720-68-0x0000000000400000-0x000000000059B000-memory.dmp

Filesize
1.6MB

Download
memory/1720-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1720-75-0x000000000026B000-0x0000000000292000-memory.dmp

Filesize
156KB

Download
memory/1720-76-0x0000000000400000-0x000000000059B000-memory.dmp

Filesize
1.6MB

Download
memory/1720-57-0x0000000000400000-0x000000000059B000-memory.dmp

Filesize
1.6MB

Download

Analysis

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