nymaim | 2f45b8aae288b3abbbb7ed8d9ecfa3ae435920d295480b537e2fd6a00a144d21

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
23/09/2022, 22:28

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General

Target
file.exe
Size 275KB
Sample220923-2dmtbsbebm
SHA256 2f45b8aae288b3abbbb7ed8d9ecfa3ae435920d295480b537e2fd6a00a144d21
MD5 795c64cb86bb41b400ef54d253b0ea89
SHA1 c467e9b37e8554e9a8882d3eb1e2796bf387412f
SHA512 3f0581fe8cb910eafe58bb75cc09014955d810fb80255337eac6437e80ed6021397ba04016743f1d295e0c5b3739e4c6564635fedb56b0892a5074868420e083
SSDEEP 3072:z+M8SsL6u3IIE75ixwGsvn9rT7sUnWThyILYSxRbBJAD7LFsylNoChrXOBfeE/P:0L7E41svhT7s0WYI9xRb+7maoCdXKe
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

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
1612	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
756	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
980	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
552	1612	WerFault.exe	30

Kills process with taskkill 1 IoCs

evasion

pid	Process
1592	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1300	file.exe
1300	file.exe
1300	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1612	Cleaner.exe
Token: SeDebugPrivilege	1592	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1300 wrote to memory of 980	1300	file.exe	28
PID 1300 wrote to memory of 980	1300	file.exe	28
PID 1300 wrote to memory of 980	1300	file.exe	28
PID 1300 wrote to memory of 980	1300	file.exe	28
PID 980 wrote to memory of 1612	980	cmd.exe	30
PID 980 wrote to memory of 1612	980	cmd.exe	30
PID 980 wrote to memory of 1612	980	cmd.exe	30
PID 980 wrote to memory of 1612	980	cmd.exe	30
PID 1612 wrote to memory of 552	1612	Cleaner.exe	32
PID 1612 wrote to memory of 552	1612	Cleaner.exe	32
PID 1612 wrote to memory of 552	1612	Cleaner.exe	32
PID 1300 wrote to memory of 756	1300	file.exe	33
PID 1300 wrote to memory of 756	1300	file.exe	33
PID 1300 wrote to memory of 756	1300	file.exe	33
PID 1300 wrote to memory of 756	1300	file.exe	33
PID 756 wrote to memory of 1592	756	cmd.exe	35
PID 756 wrote to memory of 1592	756	cmd.exe	35
PID 756 wrote to memory of 1592	756	cmd.exe	35
PID 756 wrote to memory of 1592	756	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:1300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:980
- - C:\Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1612
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1612 -s 1152
      4⤵
      Program crash
      PID:552
- 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:756
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\SamSAhw6IXt4Rs8NDoCOeVNi9\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/1300-55-0x000000000026B000-0x0000000000292000-memory.dmp

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memory/1300-75-0x000000000026B000-0x0000000000292000-memory.dmp

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memory/1300-64-0x000000000026B000-0x0000000000292000-memory.dmp

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memory/1300-65-0x0000000000400000-0x000000000059F000-memory.dmp

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memory/1300-76-0x0000000000400000-0x000000000059F000-memory.dmp

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memory/1300-57-0x0000000000400000-0x000000000059F000-memory.dmp

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memory/1300-56-0x00000000003C0000-0x00000000003FF000-memory.dmp

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memory/1300-54-0x0000000074F41000-0x0000000074F43000-memory.dmp

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memory/1300-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1612-68-0x00000000003D0000-0x0000000000412000-memory.dmp

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memory/1612-66-0x000007FEFBAE1000-0x000007FEFBAE3000-memory.dmp

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memory/1612-63-0x0000000000250000-0x00000000003D0000-memory.dmp

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