nymaim | c81f81937e159270e5bc23b1e2493be6c7ebaa76edf14dc611d942c8abdc1e15

General

Target

file.exe
Size

1.9MB
MD5

9dcd2d5334d195e14301bdaebfea449d
SHA1

3377061801435b4dd14d60b97e34d06095743b8f
SHA256

c81f81937e159270e5bc23b1e2493be6c7ebaa76edf14dc611d942c8abdc1e15
SHA512

452452dd7cf106f4e5425bf159c28d99305097356bfaee4d848e28a974195b187608924c92dbb274f0884f3f4a3128fe8b612f68b61eee18dd295332080a1716
SSDEEP

49152:HiaWn5Ex4+0W46k+8qgFxmRBjHIImzAQVQZbbZD8nu8UkqB5:HiaWnuR4DqgFxmRBLGUbbyfqr

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
1164	is-JIOBQ.tmp
1808	SplitFiles131.exe
4748	JJBGe0959KHx.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	SplitFiles131.exe

Loads dropped DLL 1 IoCs

pid	Process
1164	is-JIOBQ.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-HUPIP.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\is-AGPDL.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-8CSS7.tmp	is-JIOBQ.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles131.exe	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\is-80G8O.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LMO2M.tmp	is-JIOBQ.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-Q9JQ1.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\is-60SND.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\is-6KBSG.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MAOB9.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1CGEQ.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1RHHA.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-87LJ9.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LGCK5.tmp	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-JIOBQ.tmp
File created	C:\Program Files (x86)\Split Files\is-QFUFM.tmp	is-JIOBQ.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
4380	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1808	SplitFiles131.exe
1808	SplitFiles131.exe
1808	SplitFiles131.exe
1808	SplitFiles131.exe
1808	SplitFiles131.exe
1808	SplitFiles131.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4380	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 1164	2072	file.exe	81
PID 2072 wrote to memory of 1164	2072	file.exe	81
PID 2072 wrote to memory of 1164	2072	file.exe	81
PID 1164 wrote to memory of 1808	1164	is-JIOBQ.tmp	82
PID 1164 wrote to memory of 1808	1164	is-JIOBQ.tmp	82
PID 1164 wrote to memory of 1808	1164	is-JIOBQ.tmp	82
PID 1808 wrote to memory of 4748	1808	SplitFiles131.exe	86
PID 1808 wrote to memory of 4748	1808	SplitFiles131.exe	86
PID 1808 wrote to memory of 4748	1808	SplitFiles131.exe	86
PID 1808 wrote to memory of 1060	1808	SplitFiles131.exe	91
PID 1808 wrote to memory of 1060	1808	SplitFiles131.exe	91
PID 1808 wrote to memory of 1060	1808	SplitFiles131.exe	91
PID 1060 wrote to memory of 4380	1060	cmd.exe	93
PID 1060 wrote to memory of 4380	1060	cmd.exe	93
PID 1060 wrote to memory of 4380	1060	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:2072
- C:\Users\Admin\AppData\Local\Temp\is-TFTES.tmp\is-JIOBQ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-TFTES.tmp\is-JIOBQ.tmp" /SL4 $D0062 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1666431 170496
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1164
- - C:\Program Files (x86)\Split Files\SplitFiles131.exe
    "C:\Program Files (x86)\Split Files\SplitFiles131.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1808
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\JJBGe0959KHx.exe
      4⤵
      Executes dropped EXE
      PID:4748
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles131.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles131.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1060
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles131.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4380

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\SplitFiles131.exe

Filesize
3.1MB

MD5
09f16de1c1b7193b65a1cdb90b0afccd

SHA1
6cb071c8fff4e63f5e9cdace0d1e4fd7bddc6c5d

SHA256
33b5d85accff5ca309b9d52398da8ebaafaf4b21be5aa596046e1efae25ab0b2

SHA512
c6335477cbb24899986645a4ae7d44d9f6cda0dc3ee9330b91e0ed0909f9014f2dd29ad026f2357da267c21f63d87d755420ce8c4772b41c9b74c1ac7e0f70df

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles131.exe

Filesize
3.1MB

MD5
09f16de1c1b7193b65a1cdb90b0afccd

SHA1
6cb071c8fff4e63f5e9cdace0d1e4fd7bddc6c5d

SHA256
33b5d85accff5ca309b9d52398da8ebaafaf4b21be5aa596046e1efae25ab0b2

SHA512
c6335477cbb24899986645a4ae7d44d9f6cda0dc3ee9330b91e0ed0909f9014f2dd29ad026f2357da267c21f63d87d755420ce8c4772b41c9b74c1ac7e0f70df

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LTHT1.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-TFTES.tmp\is-JIOBQ.tmp

Filesize
760KB

MD5
e8176050192fbb976d70238e3c121f4c

SHA1
2f1fd24efe1f3f3fee775cc3f5255b32f8880900

SHA256
ab4fe42a7b708ddb648bb2088216ff47b877ae599fd52ff50359fc1db8e11ef7

SHA512
27edf7a71c6546f1ab52e7ef97e404975ddd237d6c2d1038d24a49eab724971884510f00f427c713adb105857a0b12c7d57ca1ca1c70a6cefed4be619c345f4c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-TFTES.tmp\is-JIOBQ.tmp

Filesize
760KB

MD5
e8176050192fbb976d70238e3c121f4c

SHA1
2f1fd24efe1f3f3fee775cc3f5255b32f8880900

SHA256
ab4fe42a7b708ddb648bb2088216ff47b877ae599fd52ff50359fc1db8e11ef7

SHA512
27edf7a71c6546f1ab52e7ef97e404975ddd237d6c2d1038d24a49eab724971884510f00f427c713adb105857a0b12c7d57ca1ca1c70a6cefed4be619c345f4c

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\JJBGe0959KHx.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\JJBGe0959KHx.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1060-153-0x0000000000000000-mapping.dmp

Download
memory/1164-134-0x0000000000000000-mapping.dmp

Download
memory/1808-143-0x0000000000400000-0x0000000001526000-memory.dmp

Filesize
17.1MB

Download
memory/1808-144-0x0000000000400000-0x0000000001526000-memory.dmp

Filesize
17.1MB

Download
memory/1808-142-0x0000000000400000-0x0000000001526000-memory.dmp

Filesize
17.1MB

Download
memory/1808-139-0x0000000000000000-mapping.dmp

Download
memory/1808-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1808-152-0x0000000000400000-0x0000000001526000-memory.dmp

Filesize
17.1MB

Download
memory/1808-155-0x0000000000400000-0x0000000001526000-memory.dmp

Filesize
17.1MB

Download
memory/2072-132-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2072-137-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2072-156-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4380-154-0x0000000000000000-mapping.dmp

Download
memory/4748-145-0x0000000000000000-mapping.dmp

Download

Analysis

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