nymaim | 6f7fe54613b35966dc9825bd09d92ed493572b157b5181412548e4faac62b2b4

General

Target

file.exe
Size

1.9MB
MD5

129e117a820cc83a8bf3666b3e922a15
SHA1

fea385a214450e1c16974c1daf1b441d460fce9b
SHA256

6f7fe54613b35966dc9825bd09d92ed493572b157b5181412548e4faac62b2b4
SHA512

9535c86c5b3ebe93093217417850b4ea794f4ab58a44925b2e620ce8de9b76fd3a5fd42ef32026bcae222680f29c847ca2bcfc5224c65d3483eda05baf332604
SSDEEP

49152:GinmpIyqcnePEx5W5hX7PnMGWPjSGWHLlcqNiEcBPjLX/nvYX0mk:GinknePw5W5hrvMN6Luq4xjLvvYE

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
4864	is-GPCPV.tmp
456	SplitFiles127.exe
2800	awyxU8w4.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	SplitFiles127.exe

Loads dropped DLL 1 IoCs

pid	Process
4864	is-GPCPV.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-0MI1D.tmp	is-GPCPV.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\is-31QBB.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CA00A.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\is-ENV32.tmp	is-GPCPV.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles127.exe	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MDU6E.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\is-BGG2C.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3QPSC.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-VC99S.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-UOQ5H.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-81995.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\is-RU2PG.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SVGI4.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\language\is-7EDLH.tmp	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-GPCPV.tmp
File created	C:\Program Files (x86)\Split Files\is-3A8MU.tmp	is-GPCPV.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
60	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
456	SplitFiles127.exe
456	SplitFiles127.exe
456	SplitFiles127.exe
456	SplitFiles127.exe
456	SplitFiles127.exe
456	SplitFiles127.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	60	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 4864	4972	file.exe	81
PID 4972 wrote to memory of 4864	4972	file.exe	81
PID 4972 wrote to memory of 4864	4972	file.exe	81
PID 4864 wrote to memory of 456	4864	is-GPCPV.tmp	82
PID 4864 wrote to memory of 456	4864	is-GPCPV.tmp	82
PID 4864 wrote to memory of 456	4864	is-GPCPV.tmp	82
PID 456 wrote to memory of 2800	456	SplitFiles127.exe	83
PID 456 wrote to memory of 2800	456	SplitFiles127.exe	83
PID 456 wrote to memory of 2800	456	SplitFiles127.exe	83
PID 456 wrote to memory of 4600	456	SplitFiles127.exe	91
PID 456 wrote to memory of 4600	456	SplitFiles127.exe	91
PID 456 wrote to memory of 4600	456	SplitFiles127.exe	91
PID 4600 wrote to memory of 60	4600	cmd.exe	93
PID 4600 wrote to memory of 60	4600	cmd.exe	93
PID 4600 wrote to memory of 60	4600	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Users\Admin\AppData\Local\Temp\is-FMITG.tmp\is-GPCPV.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-FMITG.tmp\is-GPCPV.tmp" /SL4 $901CE "C:\Users\Admin\AppData\Local\Temp\file.exe" 1723145 209408
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4864
- - C:\Program Files (x86)\Split Files\SplitFiles127.exe
    "C:\Program Files (x86)\Split Files\SplitFiles127.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:456
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\awyxU8w4.exe
      4⤵
      Executes dropped EXE
      PID:2800
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles127.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles127.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4600
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles127.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:60

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\SplitFiles127.exe

Filesize
3.3MB

MD5
99eeffda9e9bdc7b02ce4bba06a8b93a

SHA1
f6a443ad6d37019e1a8e9619d49efc56be73f4e6

SHA256
c800fb4af7d98cd1968b2c0228ca4e57368e4236fb34090046a91d53b6b0d66b

SHA512
318cd5832f467a2fa4d5482eedea7854b52cbea56e807b0a42f7a5a336969960f978f3b4b10f2daf0a190fe98f5feea671585da1d642997c2b89bf9e1d99f7a5

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles127.exe

Filesize
3.3MB

MD5
99eeffda9e9bdc7b02ce4bba06a8b93a

SHA1
f6a443ad6d37019e1a8e9619d49efc56be73f4e6

SHA256
c800fb4af7d98cd1968b2c0228ca4e57368e4236fb34090046a91d53b6b0d66b

SHA512
318cd5832f467a2fa4d5482eedea7854b52cbea56e807b0a42f7a5a336969960f978f3b4b10f2daf0a190fe98f5feea671585da1d642997c2b89bf9e1d99f7a5

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-FMITG.tmp\is-GPCPV.tmp

Filesize
798KB

MD5
00081e3866e7683ce75741b46d1c4606

SHA1
6652d800b30240d6d251fd65d8b44f0cf7b0bbee

SHA256
22aff95c972dce3e96efb036fd09de545601cff2de586273033cf3364ee27c4b

SHA512
97cf5be40c6b54c9f937b610a6a9e0d43c44c802913b3bbeea2bf38b3d9e112fa7302c46cf785b00d2527480b8f3e712cce1055915a1d1b908e317f9da8d6c55

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-FMITG.tmp\is-GPCPV.tmp

Filesize
798KB

MD5
00081e3866e7683ce75741b46d1c4606

SHA1
6652d800b30240d6d251fd65d8b44f0cf7b0bbee

SHA256
22aff95c972dce3e96efb036fd09de545601cff2de586273033cf3364ee27c4b

SHA512
97cf5be40c6b54c9f937b610a6a9e0d43c44c802913b3bbeea2bf38b3d9e112fa7302c46cf785b00d2527480b8f3e712cce1055915a1d1b908e317f9da8d6c55

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\awyxU8w4.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\awyxU8w4.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/456-143-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/456-142-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/456-144-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/456-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/456-152-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/456-155-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/4972-132-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/4972-137-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/4972-156-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download

Analysis

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