nymaim | 60428724c18d374ade63bf70dce73d4d0e503ce95fc9eb3ea424ba9bd0519824

General

Target

file.exe
Size

1.9MB
MD5

bb6b0c6a0a631b0964fbc610cba38648
SHA1

307b378cefe3bd1480dd3af8c1f8cb560665ef13
SHA256

60428724c18d374ade63bf70dce73d4d0e503ce95fc9eb3ea424ba9bd0519824
SHA512

5701dbd3a293e7f1f6fd6be084205ea44d46190a70cadd235d9af404e2a89237f6ef31469e6e7b3ce11431b82775e6dfca9a4f67ca492383ff1678595276d6d7
SSDEEP

49152:PH1r1flZm1PiVfFNDNAONZ1Nn2B/dkbR2Z+8vb4UjaVJT4L6u5WP7p30:P/tbnHNn2BVkN2Eeb/Oe64Gd0

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
1336	is-I6KF9.tmp
4636	SplitFiles118.exe
4400	v68WThEseNc4D0.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	SplitFiles118.exe

Loads dropped DLL 1 IoCs

pid	Process
1336	is-I6KF9.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-JIH98.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-I0IRS.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-6MI3B.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\is-90JEH.tmp	is-I6KF9.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JTEF4.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-7O4OO.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\is-JI17L.tmp	is-I6KF9.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles118.exe	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-2PLH7.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DB1GU.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\is-A2MU5.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\is-M1KGR.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\is-90RE7.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LTLHG.tmp	is-I6KF9.tmp
File created	C:\Program Files (x86)\Split Files\language\is-Q6I68.tmp	is-I6KF9.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
5116	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4636	SplitFiles118.exe
4636	SplitFiles118.exe
4636	SplitFiles118.exe
4636	SplitFiles118.exe
4636	SplitFiles118.exe
4636	SplitFiles118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 1336	4532	file.exe	81
PID 4532 wrote to memory of 1336	4532	file.exe	81
PID 4532 wrote to memory of 1336	4532	file.exe	81
PID 1336 wrote to memory of 4636	1336	is-I6KF9.tmp	82
PID 1336 wrote to memory of 4636	1336	is-I6KF9.tmp	82
PID 1336 wrote to memory of 4636	1336	is-I6KF9.tmp	82
PID 4636 wrote to memory of 4400	4636	SplitFiles118.exe	83
PID 4636 wrote to memory of 4400	4636	SplitFiles118.exe	83
PID 4636 wrote to memory of 4400	4636	SplitFiles118.exe	83
PID 4636 wrote to memory of 2412	4636	SplitFiles118.exe	91
PID 4636 wrote to memory of 2412	4636	SplitFiles118.exe	91
PID 4636 wrote to memory of 2412	4636	SplitFiles118.exe	91
PID 2412 wrote to memory of 5116	2412	cmd.exe	93
PID 2412 wrote to memory of 5116	2412	cmd.exe	93
PID 2412 wrote to memory of 5116	2412	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:4532
- C:\Users\Admin\AppData\Local\Temp\is-D2LB7.tmp\is-I6KF9.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-D2LB7.tmp\is-I6KF9.tmp" /SL4 $9002C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1780424 133120
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1336
- - C:\Program Files (x86)\Split Files\SplitFiles118.exe
    "C:\Program Files (x86)\Split Files\SplitFiles118.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4636
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\v68WThEseNc4D0.exe
      4⤵
      Executes dropped EXE
      PID:4400
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles118.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles118.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2412
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles118.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:5116

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\SplitFiles118.exe

Filesize
3.3MB

MD5
a237f9b4a3e79b6e64bc71609eda1cd8

SHA1
f75a213ff6fcc3e38700250869acf3d1d1da9e05

SHA256
1b153717c0407b7c00c89029b374e2d5ba3c03b2a70562acaf4ba3b79538195d

SHA512
17d6453877c4a4ebf13e221d67bdb30aa957d37703ce54440fdeec3563ced6927ba95a22750df6d798efa60475a8d88af82667f13ec2a6e101f708389be3ac1a

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles118.exe

Filesize
3.3MB

MD5
a237f9b4a3e79b6e64bc71609eda1cd8

SHA1
f75a213ff6fcc3e38700250869acf3d1d1da9e05

SHA256
1b153717c0407b7c00c89029b374e2d5ba3c03b2a70562acaf4ba3b79538195d

SHA512
17d6453877c4a4ebf13e221d67bdb30aa957d37703ce54440fdeec3563ced6927ba95a22750df6d798efa60475a8d88af82667f13ec2a6e101f708389be3ac1a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-D2LB7.tmp\is-I6KF9.tmp

Filesize
723KB

MD5
703b4da86c2d38881230d26bc1051cb2

SHA1
13b9e7582e94cb6e4f703bc08a28c53cdc003019

SHA256
90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

SHA512
e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-D2LB7.tmp\is-I6KF9.tmp

Filesize
723KB

MD5
703b4da86c2d38881230d26bc1051cb2

SHA1
13b9e7582e94cb6e4f703bc08a28c53cdc003019

SHA256
90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

SHA512
e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-KQQ57.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}\v68WThEseNc4D0.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\v68WThEseNc4D0.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4532-156-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4532-132-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4532-134-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4636-143-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/4636-144-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/4636-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4636-152-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/4636-142-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/4636-155-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download

Analysis

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