nymaim | fe0fe34e610a57bfa835481a69564d47ebae465cbd23a53b8e85364d3a783786

General

Target

file.exe
Size

2.0MB
MD5

30777b37d22c0b3e1dce5ac494ee4378
SHA1

8580ba4628213f6994a11a6a4d1d12111823de15
SHA256

fe0fe34e610a57bfa835481a69564d47ebae465cbd23a53b8e85364d3a783786
SHA512

5cb78abcafb06568dec8d0b4456011843396a88b40d54eb615be35688a6b9e0a004d91f3a4d59d77751e7908284044ad5f52f82d14c7900ec522e56dfe8f2966
SSDEEP

49152:oih71yxKixouZRMFm4z8mUv5ZGPtaI24cU97NP:oihxKBOsWm4QD5Ia34cQNP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4292	is-V8FTR.tmp
4896	SplitFiles130.exe
3740	BELxwIE.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	SplitFiles130.exe

Loads dropped DLL 1 IoCs

pid	Process
4292	is-V8FTR.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-K5DT4.tmp	is-V8FTR.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-S4CG5.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\is-GKBC5.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0CFDI.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3D8ML.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JT2NH.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-OMQVB.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CHR59.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-V2E9L.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\is-LTELE.tmp	is-V8FTR.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles130.exe	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\is-BU94F.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\is-IAGPD.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\is-B633Q.tmp	is-V8FTR.tmp
File created	C:\Program Files (x86)\Split Files\language\is-PPVC9.tmp	is-V8FTR.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1992	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4896	SplitFiles130.exe
4896	SplitFiles130.exe
4896	SplitFiles130.exe
4896	SplitFiles130.exe
4896	SplitFiles130.exe
4896	SplitFiles130.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4896	SplitFiles130.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 4292	1488	file.exe	79
PID 1488 wrote to memory of 4292	1488	file.exe	79
PID 1488 wrote to memory of 4292	1488	file.exe	79
PID 4292 wrote to memory of 4896	4292	is-V8FTR.tmp	80
PID 4292 wrote to memory of 4896	4292	is-V8FTR.tmp	80
PID 4292 wrote to memory of 4896	4292	is-V8FTR.tmp	80
PID 4896 wrote to memory of 3740	4896	SplitFiles130.exe	81
PID 4896 wrote to memory of 3740	4896	SplitFiles130.exe	81
PID 4896 wrote to memory of 3740	4896	SplitFiles130.exe	81
PID 4896 wrote to memory of 1432	4896	SplitFiles130.exe	83
PID 4896 wrote to memory of 1432	4896	SplitFiles130.exe	83
PID 4896 wrote to memory of 1432	4896	SplitFiles130.exe	83
PID 1432 wrote to memory of 1992	1432	cmd.exe	85
PID 1432 wrote to memory of 1992	1432	cmd.exe	85
PID 1432 wrote to memory of 1992	1432	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1488
- C:\Users\Admin\AppData\Local\Temp\is-CK4UN.tmp\is-V8FTR.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-CK4UN.tmp\is-V8FTR.tmp" /SL4 $D0066 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1801026 317440
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4292
- - C:\Program Files (x86)\Split Files\SplitFiles130.exe
    "C:\Program Files (x86)\Split Files\SplitFiles130.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4896
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\BELxwIE.exe
      4⤵
      Executes dropped EXE
      PID:3740
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles130.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles130.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1432
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles130.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1992

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Split Files\SplitFiles130.exe

Filesize
3.3MB

MD5
371f92d060d2d808501f06b28da092c8

SHA1
26f36a099210d058326e9bc98848c856ab321b84

SHA256
d8efa85ae0be52abd849bc0edd7ae016e59e9edf4f34375cfb714e51d77af230

SHA512
5e090d5be6c90c1a9f92791977322e6d2c2e9fd687b00be0d3340a4f64ae89472dd08face75adc670c455cc378b1b7c7a29f4cb74950d936f2b56a339c39855d

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles130.exe

Filesize
3.3MB

MD5
371f92d060d2d808501f06b28da092c8

SHA1
26f36a099210d058326e9bc98848c856ab321b84

SHA256
d8efa85ae0be52abd849bc0edd7ae016e59e9edf4f34375cfb714e51d77af230

SHA512
5e090d5be6c90c1a9f92791977322e6d2c2e9fd687b00be0d3340a4f64ae89472dd08face75adc670c455cc378b1b7c7a29f4cb74950d936f2b56a339c39855d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-07A3O.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-CK4UN.tmp\is-V8FTR.tmp

Filesize
904KB

MD5
86fa7d6a19cb2f684d41a87340ae236b

SHA1
9882401e2ee1201b81e34c59ab5baae572f8aaa8

SHA256
a50d5dee599a94b9997b0b8eef81f2a9b78e4e7180a531b00b0b2f17605704ad

SHA512
20d13e2f14ba4907d3a9988133eb07483afd6cbd5c43deb7f314cf1cd13835bd7b9cbd59a7a5075102bb47d7dcf27111519c79b2222584dc64e6a4c573f52149

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-CK4UN.tmp\is-V8FTR.tmp

Filesize
904KB

MD5
86fa7d6a19cb2f684d41a87340ae236b

SHA1
9882401e2ee1201b81e34c59ab5baae572f8aaa8

SHA256
a50d5dee599a94b9997b0b8eef81f2a9b78e4e7180a531b00b0b2f17605704ad

SHA512
20d13e2f14ba4907d3a9988133eb07483afd6cbd5c43deb7f314cf1cd13835bd7b9cbd59a7a5075102bb47d7dcf27111519c79b2222584dc64e6a4c573f52149

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\BELxwIE.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\BELxwIE.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1488-156-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1488-132-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1488-138-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4896-143-0x0000000000400000-0x000000000154A000-memory.dmp

Filesize
17.3MB

Download
memory/4896-148-0x0000000000400000-0x000000000154A000-memory.dmp

Filesize
17.3MB

Download
memory/4896-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4896-144-0x0000000000400000-0x000000000154A000-memory.dmp

Filesize
17.3MB

Download
memory/4896-142-0x0000000000400000-0x000000000154A000-memory.dmp

Filesize
17.3MB

Download
memory/4896-155-0x0000000000400000-0x000000000154A000-memory.dmp

Filesize
17.3MB

Download

Analysis

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