nymaim | 9da5b3814d6c27436505973bb864a80c081cbf6b62d0bef51b933896bd8590e9

Analysis

max time kernel
117s
max time network
120s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
25/09/2022, 09:06

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General

Target
file.exe
Size 290KB
Sample220925-k2qrfseag3
SHA256 9da5b3814d6c27436505973bb864a80c081cbf6b62d0bef51b933896bd8590e9
MD5 77e8a34e1fb3db6562754d1e11d48213
SHA1 e3f6090b70500c9e7d0d5055a7890b5e12342f91
SHA512 e6d1ca87d4ab0790c34054045f3006ea70a0e07e98fe257471b98921639a810db48a055f537916f20e0e09e3915e94f0a5a3853d6ea87b93e75a8a8a66221e1f
SSDEEP 6144:hc+nTbrP3Oef/n8DsNq1AE2k65Oc/W+NC33TTH:h1rPbHn1Nq8kjw83
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
980	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1304	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1492	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
2016	980	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1252	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1516	file.exe
1516	file.exe
1516	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	980	Cleaner.exe
Token: SeDebugPrivilege	1252	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1516 wrote to memory of 1492	1516	file.exe	29
PID 1516 wrote to memory of 1492	1516	file.exe	29
PID 1516 wrote to memory of 1492	1516	file.exe	29
PID 1516 wrote to memory of 1492	1516	file.exe	29
PID 1492 wrote to memory of 980	1492	cmd.exe	31
PID 1492 wrote to memory of 980	1492	cmd.exe	31
PID 1492 wrote to memory of 980	1492	cmd.exe	31
PID 1492 wrote to memory of 980	1492	cmd.exe	31
PID 980 wrote to memory of 2016	980	Cleaner.exe	33
PID 980 wrote to memory of 2016	980	Cleaner.exe	33
PID 980 wrote to memory of 2016	980	Cleaner.exe	33
PID 1516 wrote to memory of 1304	1516	file.exe	34
PID 1516 wrote to memory of 1304	1516	file.exe	34
PID 1516 wrote to memory of 1304	1516	file.exe	34
PID 1516 wrote to memory of 1304	1516	file.exe	34
PID 1304 wrote to memory of 1252	1304	cmd.exe	36
PID 1304 wrote to memory of 1252	1304	cmd.exe	36
PID 1304 wrote to memory of 1252	1304	cmd.exe	36
PID 1304 wrote to memory of 1252	1304	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:1516
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\Y332XfAvF8vxPaZ3ok8adUtJQS\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Users\Admin\AppData\Local\Temp\Y332XfAvF8vxPaZ3ok8adUtJQS\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\Y332XfAvF8vxPaZ3ok8adUtJQS\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:980
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 980 -s 1156
      4⤵
      Program crash
      PID:2016
- 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:1304
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1252

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\Y332XfAvF8vxPaZ3ok8adUtJQS\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\Y332XfAvF8vxPaZ3ok8adUtJQS\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\Y332XfAvF8vxPaZ3ok8adUtJQS\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\Y332XfAvF8vxPaZ3ok8adUtJQS\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/980-64-0x000007FEFB7F1000-0x000007FEFB7F3000-memory.dmp

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memory/980-63-0x00000000013C0000-0x0000000001540000-memory.dmp

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memory/980-66-0x0000000000B50000-0x0000000000B92000-memory.dmp

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memory/1516-54-0x0000000075111000-0x0000000075113000-memory.dmp

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memory/1516-55-0x00000000002CB000-0x00000000002F2000-memory.dmp

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memory/1516-56-0x0000000000270000-0x00000000002AF000-memory.dmp

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memory/1516-67-0x00000000002CB000-0x00000000002F2000-memory.dmp

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memory/1516-68-0x0000000000400000-0x00000000005A2000-memory.dmp

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memory/1516-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1516-75-0x00000000002CB000-0x00000000002F2000-memory.dmp

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memory/1516-76-0x0000000000400000-0x00000000005A2000-memory.dmp

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memory/1516-57-0x0000000000400000-0x00000000005A2000-memory.dmp

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